Commit graph

967814 commits

Author SHA1 Message Date
Linus Torvalds 111e91a6df - fix system call exit path; avoid return to user space with
any TIF/CIF/PIF set
 
 - fix file permission for cpum_sfb_size parameter
 
 - another small defconfig update
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Merge tag 's390-5.10-4' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull s390 fixes from Heiko Carstens:

 - fix system call exit path; avoid return to user space with any
   TIF/CIF/PIF set

 - fix file permission for cpum_sfb_size parameter

 - another small defconfig update

* tag 's390-5.10-4' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/cpum_sf.c: fix file permission for cpum_sfb_size
  s390: update defconfigs
  s390: fix system call exit path
2020-11-17 11:22:03 -08:00
Linus Torvalds ed129cd75a - fix bug preventing booting on several platforms
- fix for build error, when modules need has_transparent_hugepage
 - fix for memleak in alchemy clk setup
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Merge tag 'mips_fixes_5.10_1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux

Pull MIPS fixes from Thomas Bogendoerfer:

 - fix bug preventing booting on several platforms

 - fix for build error, when modules need has_transparent_hugepage

 - fix for memleak in alchemy clk setup

* tag 'mips_fixes_5.10_1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux:
  MIPS: Alchemy: Fix memleak in alchemy_clk_setup_cpu
  MIPS: kernel: Fix for_each_memblock conversion
  MIPS: export has_transparent_hugepage() for modules
2020-11-17 11:15:08 -08:00
Ryan Sharpelletti 1b9e2a8c99 tcp: only postpone PROBE_RTT if RTT is < current min_rtt estimate
During loss recovery, retransmitted packets are forced to use TCP
timestamps to calculate the RTT samples, which have a millisecond
granularity. BBR is designed using a microsecond granularity. As a
result, multiple RTT samples could be truncated to the same RTT value
during loss recovery. This is problematic, as BBR will not enter
PROBE_RTT if the RTT sample is <= the current min_rtt sample, meaning
that if there are persistent losses, PROBE_RTT will constantly be
pushed off and potentially never re-entered. This patch makes sure
that BBR enters PROBE_RTT by checking if RTT sample is < the current
min_rtt sample, rather than <=.

The Netflix transport/TCP team discovered this bug in the Linux TCP
BBR code during lab tests.

Fixes: 0f8782ea14 ("tcp_bbr: add BBR congestion control")
Signed-off-by: Ryan Sharpelletti <sharpelletti@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Soheil Hassas Yeganeh <soheil@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Link: https://lore.kernel.org/r/20201116174412.1433277-1-sharpelletti.kdev@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-17 11:03:22 -08:00
Joel Stanley 3d5179458d net: ftgmac100: Fix crash when removing driver
When removing the driver we would hit BUG_ON(!list_empty(&dev->ptype_specific))
in net/core/dev.c due to still having the NC-SI packet handler
registered.

 # echo 1e660000.ethernet > /sys/bus/platform/drivers/ftgmac100/unbind
  ------------[ cut here ]------------
  kernel BUG at net/core/dev.c:10254!
  Internal error: Oops - BUG: 0 [#1] SMP ARM
  CPU: 0 PID: 115 Comm: sh Not tainted 5.10.0-rc3-next-20201111-00007-g02e0365710c4 #46
  Hardware name: Generic DT based system
  PC is at netdev_run_todo+0x314/0x394
  LR is at cpumask_next+0x20/0x24
  pc : [<806f5830>]    lr : [<80863cb0>]    psr: 80000153
  sp : 855bbd58  ip : 00000001  fp : 855bbdac
  r10: 80c03d00  r9 : 80c06228  r8 : 81158c54
  r7 : 00000000  r6 : 80c05dec  r5 : 80c05d18  r4 : 813b9280
  r3 : 813b9054  r2 : 8122c470  r1 : 00000002  r0 : 00000002
  Flags: Nzcv  IRQs on  FIQs off  Mode SVC_32  ISA ARM  Segment none
  Control: 00c5387d  Table: 85514008  DAC: 00000051
  Process sh (pid: 115, stack limit = 0x7cb5703d)
 ...
  Backtrace:
  [<806f551c>] (netdev_run_todo) from [<80707eec>] (rtnl_unlock+0x18/0x1c)
   r10:00000051 r9:854ed710 r8:81158c54 r7:80c76bb0 r6:81158c10 r5:8115b410
   r4:813b9000
  [<80707ed4>] (rtnl_unlock) from [<806f5db8>] (unregister_netdev+0x2c/0x30)
  [<806f5d8c>] (unregister_netdev) from [<805a8180>] (ftgmac100_remove+0x20/0xa8)
   r5:8115b410 r4:813b9000
  [<805a8160>] (ftgmac100_remove) from [<805355e4>] (platform_drv_remove+0x34/0x4c)

Fixes: bd466c3fb5 ("net/faraday: Support NCSI mode")
Signed-off-by: Joel Stanley <joel@jms.id.au>
Link: https://lore.kernel.org/r/20201117024448.1170761-1-joel@jms.id.au
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-17 10:59:03 -08:00
Zhang Changzhong 7b027c249d net: b44: fix error return code in b44_init_one()
Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function.

Fixes: 39a6f4bce6 ("b44: replace the ssb_dma API with the generic DMA API")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>
Reviewed-by: Michael Chan <michael.chan@broadcom.com>
Link: https://lore.kernel.org/r/1605582131-36735-1-git-send-email-zhangchangzhong@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-17 10:50:28 -08:00
Linus Torvalds be1dd6692a perf tools updates for v5.10: 3rd batch.
- Fix file corruption due to event deletion in 'perf inject'.
 
 - Update arch/x86/lib/mem{cpy,set}_64.S copies used in 'perf bench mem
   memcpy', silencing perf build warning.
 
 - Avoid an msan warning in a copied stack in 'perf test'.
 
 - Correct tracepoint field name "flags" in ARM's CS-ETM hardware tracing
   'perf test' entry.
 
 - Update branch sample pattern for cs-etm to cope with excluding guest
   in userspace counting.
 
 - Don't free "lock_seq_stat" if read_count isn't zero in 'perf lock'.
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 
 Test results:
 
 The first ones are container based builds of tools/perf with and without libelf
 support.  Where clang is available, it is also used to build perf with/without
 libelf, and building with LIBCLANGLLVM=1 (built-in clang) with gcc and clang
 when clang and its devel libraries are installed.
 
 The objtool and samples/bpf/ builds are disabled now that I'm switching from
 using the sources in a local volume to fetching them from a http server to
 build it inside the container, to make it easier to build in a container cluster.
 Those will come back later.
 
 Several are cross builds, the ones with -x-ARCH and the android one, and those
 may not have all the features built, due to lack of multi-arch devel packages,
 available and being used so far on just a few, like
 debian:experimental-x-{arm64,mipsel}.
 
 The 'perf test' one will perform a variety of tests exercising
 tools/perf/util/, tools/lib/{bpf,traceevent,etc}, as well as run perf commands
 with a variety of command line event specifications to then intercept the
 sys_perf_event syscall to check that the perf_event_attr fields are set up as
 expected, among a variety of other unit tests.
 
 Then there is the 'make -C tools/perf build-test' ones, that build tools/perf/
 with a variety of feature sets, exercising the build with an incomplete set of
 features as well as with a complete one. It is planned to have it run on each
 of the containers mentioned above, using some container orchestration
 infrastructure. Get in contact if interested in helping having this in place.
 
   $ grep "model name" -m1 /proc/cpuinfo
   model name: AMD Ryzen 9 3900X 12-Core Processor
   $ export PERF_TARBALL=http://192.168.86.5/perf/perf-5.10.0-rc3.tar.xz
   $ dm
    1    71.39 alpine:3.4                    : Ok   gcc (Alpine 5.3.0) 5.3.0, clang version 3.8.0 (tags/RELEASE_380/final)
    2    70.77 alpine:3.5                    : Ok   gcc (Alpine 6.2.1) 6.2.1 20160822, clang version 3.8.1 (tags/RELEASE_381/final)
    3    73.70 alpine:3.6                    : Ok   gcc (Alpine 6.3.0) 6.3.0, clang version 4.0.0 (tags/RELEASE_400/final)
    4    82.24 alpine:3.7                    : Ok   gcc (Alpine 6.4.0) 6.4.0, Alpine clang version 5.0.0 (tags/RELEASE_500/final) (based on LLVM 5.0.0)
    5    82.21 alpine:3.8                    : Ok   gcc (Alpine 6.4.0) 6.4.0, Alpine clang version 5.0.1 (tags/RELEASE_501/final) (based on LLVM 5.0.1)
    6    84.79 alpine:3.9                    : Ok   gcc (Alpine 8.3.0) 8.3.0, Alpine clang version 5.0.1 (tags/RELEASE_502/final) (based on LLVM 5.0.1)
    7   106.15 alpine:3.10                   : Ok   gcc (Alpine 8.3.0) 8.3.0, Alpine clang version 8.0.0 (tags/RELEASE_800/final) (based on LLVM 8.0.0)
    8   120.21 alpine:3.11                   : Ok   gcc (Alpine 9.3.0) 9.3.0, Alpine clang version 9.0.0 (https://git.alpinelinux.org/aports f7f0d2c2b8bcd6a5843401a9a702029556492689) (based on LLVM 9.0.0)
    9   111.49 alpine:3.12                   : Ok   gcc (Alpine 9.3.0) 9.3.0, Alpine clang version 10.0.0 (https://gitlab.alpinelinux.org/alpine/aports.git 7445adce501f8473efdb93b17b5eaf2f1445ed4c)
   10   119.72 alpine:edge                   : Ok   gcc (Alpine 10.2.0) 10.2.0, Alpine clang version 10.0.1
   11    70.03 alt:p8                        : Ok   x86_64-alt-linux-gcc (GCC) 5.3.1 20151207 (ALT p8 5.3.1-alt3.M80P.1), clang version 3.8.0 (tags/RELEASE_380/final)
   12    86.89 alt:p9                        : Ok   x86_64-alt-linux-gcc (GCC) 8.4.1 20200305 (ALT p9 8.4.1-alt0.p9.1), clang version 10.0.0
   13    84.45 alt:sisyphus                  : Ok   x86_64-alt-linux-gcc (GCC) 9.3.1 20200518 (ALT Sisyphus 9.3.1-alt1), clang version 10.0.1
   14    67.56 amazonlinux:1                 : Ok   gcc (GCC) 7.2.1 20170915 (Red Hat 7.2.1-2), clang version 3.6.2 (tags/RELEASE_362/final)
   15   101.57 amazonlinux:2                 : Ok   gcc (GCC) 7.3.1 20180712 (Red Hat 7.3.1-9), clang version 7.0.1 (Amazon Linux 2 7.0.1-1.amzn2.0.2)
   16    22.59 android-ndk:r12b-arm          : Ok   arm-linux-androideabi-gcc (GCC) 4.9.x 20150123 (prerelease)
   17    22.50 android-ndk:r15c-arm          : Ok   arm-linux-androideabi-gcc (GCC) 4.9.x 20150123 (prerelease)
   18    12.05 centos:6                      : FAIL gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-23)
 
 	Ancient gcc get this wrong:
 
 	/git/linux/tools/lib/bpf/libbpf.h:203: error: wrong number of arguments specified for 'deprecated' attribute
 
 	But when using NO_LIBBPF we should not hit this, changes for that to happen will land in 5.11 as they require
 	more surgery than advisable for this late in 5.10 rc.
 
   19    32.72 centos:7                      : Ok   gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-44)
   20   118.02 centos:8                      : Ok   gcc (GCC) 8.3.1 20191121 (Red Hat 8.3.1-5), clang version 9.0.1 (Red Hat 9.0.1-2.module_el8.2.0+309+0c7b6b03)
   21    62.52 clearlinux:latest             : Ok   gcc (Clear Linux OS for Intel Architecture) 10.2.1 20201105 releases/gcc-10.2.0-465-g2b4cba9a30, clang version 10.0.1
   22    78.48 debian:8                      : Ok   gcc (Debian 4.9.2-10+deb8u2) 4.9.2, Debian clang version 3.5.0-10 (tags/RELEASE_350/final) (based on LLVM 3.5.0)
   23    79.18 debian:9                      : Ok   gcc (Debian 6.3.0-18+deb9u1) 6.3.0 20170516, clang version 3.8.1-24 (tags/RELEASE_381/final)
   24    76.33 debian:10                     : Ok   gcc (Debian 8.3.0-6) 8.3.0, clang version 7.0.1-8+deb10u2 (tags/RELEASE_701/final)
   25    93.16 debian:experimental           : Ok   gcc (Debian 10.2.0-16) 10.2.0, Debian clang version 11.0.0-4
   26    30.47 debian:experimental-x-mips64  : Ok   mips64-linux-gnuabi64-gcc (Debian 9.3.0-8) 9.3.0
   27    31.23 fedora:20                     : Ok   gcc (GCC) 4.8.3 20140911 (Red Hat 4.8.3-7)
   28    31.77 fedora:22                     : Ok   gcc (GCC) 5.3.1 20160406 (Red Hat 5.3.1-6), clang version 3.5.0 (tags/RELEASE_350/final)
   29    70.66 fedora:23                     : Ok   gcc (GCC) 5.3.1 20160406 (Red Hat 5.3.1-6), clang version 3.7.0 (tags/RELEASE_370/final)
   30    82.84 fedora:24                     : Ok   gcc (GCC) 6.3.1 20161221 (Red Hat 6.3.1-1), clang version 3.8.1 (tags/RELEASE_381/final)
   31    25.41 fedora:24-x-ARC-uClibc        : Ok   arc-linux-gcc (ARCompact ISA Linux uClibc toolchain 2017.09-rc2) 7.1.1 20170710
   32    84.37 fedora:25                     : Ok   gcc (GCC) 6.4.1 20170727 (Red Hat 6.4.1-1), clang version 3.9.1 (tags/RELEASE_391/final)
   33    96.38 fedora:26                     : Ok   gcc (GCC) 7.3.1 20180130 (Red Hat 7.3.1-2), clang version 4.0.1 (tags/RELEASE_401/final)
   34    97.16 fedora:27                     : Ok   gcc (GCC) 7.3.1 20180712 (Red Hat 7.3.1-6), clang version 5.0.2 (tags/RELEASE_502/final)
   35   107.89 fedora:28                     : Ok   gcc (GCC) 8.3.1 20190223 (Red Hat 8.3.1-2), clang version 6.0.1 (tags/RELEASE_601/final)
   36   113.43 fedora:29                     : Ok   gcc (GCC) 8.3.1 20190223 (Red Hat 8.3.1-2), clang version 7.0.1 (Fedora 7.0.1-6.fc29)
   37   117.85 fedora:30                     : Ok   gcc (GCC) 9.3.1 20200408 (Red Hat 9.3.1-2), clang version 8.0.0 (Fedora 8.0.0-3.fc30)
   38    25.36 fedora:30-x-ARC-uClibc        : Ok   arc-linux-gcc (ARCv2 ISA Linux uClibc toolchain 2019.03-rc1) 8.3.1 20190225
   39   116.54 fedora:31                     : Ok   gcc (GCC) 9.3.1 20200408 (Red Hat 9.3.1-2), clang version 9.0.1 (Fedora 9.0.1-4.fc31)
   40    98.36 fedora:32                     : Ok   gcc (GCC) 10.2.1 20201016 (Red Hat 10.2.1-6), clang version 10.0.1 (Fedora 10.0.1-3.fc32)
   41    97.72 fedora:33                     : Ok   gcc (GCC) 10.2.1 20201005 (Red Hat 10.2.1-5), clang version 11.0.0 (Fedora 11.0.0-1.fc33)
   42    98.60 fedora:rawhide                : Ok   gcc (GCC) 10.2.1 20201112 (Red Hat 10.2.1-8), clang version 11.0.0 (Fedora 11.0.0-2.fc34)
   43    35.00 gentoo-stage3-amd64:latest    : Ok   gcc (Gentoo 9.3.0-r1 p3) 9.3.0
   44    70.27 mageia:5                      : Ok   gcc (GCC) 4.9.2, clang version 3.5.2 (tags/RELEASE_352/final)
   45    86.27 mageia:6                      : Ok   gcc (Mageia 5.5.0-1.mga6) 5.5.0, clang version 3.9.1 (tags/RELEASE_391/final)
   46   103.63 manjaro:latest                : Ok   gcc (GCC) 10.2.0, clang version 10.0.1
   47   228.99 openmandriva:cooker           : Ok   gcc (GCC) 10.2.0 20200723 (OpenMandriva), OpenMandriva 11.0.0-1 clang version 11.0.0 (/builddir/build/BUILD/llvm-project-llvmorg-11.0.0/clang 63e22714ac938c6b537bd958f70680d3331a2030)
   48   120.44 opensuse:15.0                 : Ok   gcc (SUSE Linux) 7.4.1 20190905 [gcc-7-branch revision 275407], clang version 5.0.1 (tags/RELEASE_501/final 312548)
   49   127.26 opensuse:15.1                 : Ok   gcc (SUSE Linux) 7.5.0, clang version 7.0.1 (tags/RELEASE_701/final 349238)
   50   117.76 opensuse:15.2                 : Ok   gcc (SUSE Linux) 7.5.0, clang version 9.0.1
   51   114.96 opensuse:42.3                 : Ok   gcc (SUSE Linux) 4.8.5, clang version 3.8.0 (tags/RELEASE_380/final 262553)
   52   110.55 opensuse:tumbleweed           : Ok   gcc (SUSE Linux) 10.2.1 20200825 [revision c0746a1beb1ba073c7981eb09f55b3d993b32e5c], clang version 10.0.1
   53    11.81 oraclelinux:6                 : FAIL gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-23.0.1)
 
 	See explanation for centos:6
 
   54    32.31 oraclelinux:7                 : Ok   gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-44.0.3)
   55   116.81 oraclelinux:8                 : Ok   gcc (GCC) 8.3.1 20191121 (Red Hat 8.3.1-5.0.3), clang version 9.0.1 (Red Hat 9.0.1-2.0.1.module+el8.2.0+5599+9ed9ef6d)
   56    28.44 ubuntu:12.04                  : Ok   gcc (Ubuntu/Linaro 4.6.3-1ubuntu5) 4.6.3, Ubuntu clang version 3.0-6ubuntu3 (tags/RELEASE_30/final) (based on LLVM 3.0)
   57    31.16 ubuntu:14.04                  : Ok   gcc (Ubuntu 4.8.4-2ubuntu1~14.04.4) 4.8.4
   58    79.71 ubuntu:16.04                  : Ok   gcc (Ubuntu 5.4.0-6ubuntu1~16.04.12) 5.4.0 20160609, clang version 3.8.0-2ubuntu4 (tags/RELEASE_380/final)
   59    27.05 ubuntu:16.04-x-arm            : Ok   arm-linux-gnueabihf-gcc (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609
   60    27.14 ubuntu:16.04-x-arm64          : Ok   aarch64-linux-gnu-gcc (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609
   61    25.89 ubuntu:16.04-x-powerpc        : Ok   powerpc-linux-gnu-gcc (Ubuntu 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609
   62    26.39 ubuntu:16.04-x-powerpc64      : Ok   powerpc64-linux-gnu-gcc (Ubuntu/IBM 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609
   63    26.32 ubuntu:16.04-x-powerpc64el    : Ok   powerpc64le-linux-gnu-gcc (Ubuntu/IBM 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609
   64    25.61 ubuntu:16.04-x-s390           : Ok   s390x-linux-gnu-gcc (Ubuntu 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609
   65    91.53 ubuntu:18.04                  : Ok   gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0, clang version 6.0.0-1ubuntu2 (tags/RELEASE_600/final)
   66    28.76 ubuntu:18.04-x-arm            : Ok   arm-linux-gnueabihf-gcc (Ubuntu/Linaro 7.5.0-3ubuntu1~18.04) 7.5.0
   67    27.64 ubuntu:18.04-x-arm64          : Ok   aarch64-linux-gnu-gcc (Ubuntu/Linaro 7.5.0-3ubuntu1~18.04) 7.5.0
   68    22.90 ubuntu:18.04-x-m68k           : Ok   m68k-linux-gnu-gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0
   69    27.23 ubuntu:18.04-x-powerpc        : Ok   powerpc-linux-gnu-gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0
   70    29.56 ubuntu:18.04-x-powerpc64      : Ok   powerpc64-linux-gnu-gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0
   71    29.76 ubuntu:18.04-x-powerpc64el    : Ok   powerpc64le-linux-gnu-gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0
   72   161.85 ubuntu:18.04-x-riscv64        : Ok   riscv64-linux-gnu-gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0
   73    25.41 ubuntu:18.04-x-s390           : Ok   s390x-linux-gnu-gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0
   74    27.77 ubuntu:18.04-x-sh4            : Ok   sh4-linux-gnu-gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0
   75    25.38 ubuntu:18.04-x-sparc64        : Ok   sparc64-linux-gnu-gcc (Ubuntu 7.5.0-3ubuntu1~18.04) 7.5.0
   76    71.37 ubuntu:19.10                  : Ok   gcc (Ubuntu 9.2.1-9ubuntu2) 9.2.1 20191008, clang version 8.0.1-3build1 (tags/RELEASE_801/final)
   77    27.53 ubuntu:19.10-x-alpha          : Ok   alpha-linux-gnu-gcc (Ubuntu 9.2.1-9ubuntu1) 9.2.1 20191008
   78    24.90 ubuntu:19.10-x-hppa           : Ok   hppa-linux-gnu-gcc (Ubuntu 9.2.1-9ubuntu1) 9.2.1 20191008
   79    75.35 ubuntu:20.04                  : Ok   gcc (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0, clang version 10.0.0-4ubuntu1
   80    31.41 ubuntu:20.04-x-powerpc64el    : Ok   powerpc64le-linux-gnu-gcc (Ubuntu 10.2.0-5ubuntu1~20.04) 10.2.0
   81    76.36 ubuntu:20.10                  : Ok   gcc (Ubuntu 10.2.0-13ubuntu1) 10.2.0, Ubuntu clang version 11.0.0-2
   $
 
   # uname -a
   Linux quaco 5.8.14-200.fc32.x86_64 #1 SMP Wed Oct 7 14:47:56 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
   # git log --oneline -1
   568beb2795 perf test: Avoid an msan warning in a copied stack.
   # perf version --build-options
   perf version 5.10.rc3.g568beb27959b
                    dwarf: [ on  ]  # HAVE_DWARF_SUPPORT
       dwarf_getlocations: [ on  ]  # HAVE_DWARF_GETLOCATIONS_SUPPORT
                    glibc: [ on  ]  # HAVE_GLIBC_SUPPORT
            syscall_table: [ on  ]  # HAVE_SYSCALL_TABLE_SUPPORT
                   libbfd: [ on  ]  # HAVE_LIBBFD_SUPPORT
                   libelf: [ on  ]  # HAVE_LIBELF_SUPPORT
                  libnuma: [ on  ]  # HAVE_LIBNUMA_SUPPORT
   numa_num_possible_cpus: [ on  ]  # HAVE_LIBNUMA_SUPPORT
                  libperl: [ on  ]  # HAVE_LIBPERL_SUPPORT
                libpython: [ on  ]  # HAVE_LIBPYTHON_SUPPORT
                 libslang: [ on  ]  # HAVE_SLANG_SUPPORT
                libcrypto: [ on  ]  # HAVE_LIBCRYPTO_SUPPORT
                libunwind: [ on  ]  # HAVE_LIBUNWIND_SUPPORT
       libdw-dwarf-unwind: [ on  ]  # HAVE_DWARF_SUPPORT
                     zlib: [ on  ]  # HAVE_ZLIB_SUPPORT
                     lzma: [ on  ]  # HAVE_LZMA_SUPPORT
                get_cpuid: [ on  ]  # HAVE_AUXTRACE_SUPPORT
                      bpf: [ on  ]  # HAVE_LIBBPF_SUPPORT
                      aio: [ on  ]  # HAVE_AIO_SUPPORT
                     zstd: [ on  ]  # HAVE_ZSTD_SUPPORT
   # perf test
    1: vmlinux symtab matches kallsyms                                 : Ok
    2: Detect openat syscall event                                     : Ok
    3: Detect openat syscall event on all cpus                         : Ok
    4: Read samples using the mmap interface                           : Ok
    5: Test data source output                                         : Ok
    6: Parse event definition strings                                  : Ok
    7: Simple expression parser                                        : Ok
    8: PERF_RECORD_* events & perf_sample fields                       : Ok
    9: Parse perf pmu format                                           : Ok
   10: PMU events                                                      :
   10.1: PMU event table sanity                                        : Ok
   10.2: PMU event map aliases                                         : Ok
   10.3: Parsing of PMU event table metrics                            : Skip (some metrics failed)
   10.4: Parsing of PMU event table metrics with fake PMUs             : Ok
   11: DSO data read                                                   : Ok
   12: DSO data cache                                                  : Ok
   13: DSO data reopen                                                 : Ok
   14: Roundtrip evsel->name                                           : Ok
   15: Parse sched tracepoints fields                                  : Ok
   16: syscalls:sys_enter_openat event fields                          : Ok
   17: Setup struct perf_event_attr                                    : Ok
   18: Match and link multiple hists                                   : Ok
   19: 'import perf' in python                                         : Ok
   20: Breakpoint overflow signal handler                              : Ok
   21: Breakpoint overflow sampling                                    : Ok
   22: Breakpoint accounting                                           : Ok
   23: Watchpoint                                                      :
   23.1: Read Only Watchpoint                                          : Skip
   23.2: Write Only Watchpoint                                         : Ok
   23.3: Read / Write Watchpoint                                       : Ok
   23.4: Modify Watchpoint                                             : Ok
   24: Number of exit events of a simple workload                      : Ok
   25: Software clock events period values                             : Ok
   26: Object code reading                                             : Ok
   27: Sample parsing                                                  : Ok
   28: Use a dummy software event to keep tracking                     : Ok
   29: Parse with no sample_id_all bit set                             : Ok
   30: Filter hist entries                                             : Ok
   31: Lookup mmap thread                                              : Ok
   32: Share thread maps                                               : Ok
   33: Sort output of hist entries                                     : Ok
   34: Cumulate child hist entries                                     : Ok
   35: Track with sched_switch                                         : Ok
   36: Filter fds with revents mask in a fdarray                       : Ok
   37: Add fd to a fdarray, making it autogrow                         : Ok
   38: kmod_path__parse                                                : Ok
   39: Thread map                                                      : Ok
   40: LLVM search and compile                                         :
   40.1: Basic BPF llvm compile                                        : Ok
   40.2: kbuild searching                                              : Ok
   40.3: Compile source for BPF prologue generation                    : Ok
   40.4: Compile source for BPF relocation                             : Ok
   41: Session topology                                                : Ok
   42: BPF filter                                                      :
   42.1: Basic BPF filtering                                           : Ok
   42.2: BPF pinning                                                   : Ok
   42.3: BPF prologue generation                                       : Ok
   42.4: BPF relocation checker                                        : Ok
   43: Synthesize thread map                                           : Ok
   44: Remove thread map                                               : Ok
   45: Synthesize cpu map                                              : Ok
   46: Synthesize stat config                                          : Ok
   47: Synthesize stat                                                 : Ok
   48: Synthesize stat round                                           : Ok
   49: Synthesize attr update                                          : Ok
   50: Event times                                                     : Ok
   51: Read backward ring buffer                                       : Ok
   52: Print cpu map                                                   : Ok
   53: Merge cpu map                                                   : Ok
   54: Probe SDT events                                                : Ok
   55: is_printable_array                                              : Ok
   56: Print bitmap                                                    : Ok
   57: perf hooks                                                      : Ok
   58: builtin clang support                                           : Skip (not compiled in)
   59: unit_number__scnprintf                                          : Ok
   60: mem2node                                                        : Ok
   61: time utils                                                      : Ok
   62: Test jit_write_elf                                              : Ok
   63: Test libpfm4 support                                            : Skip (not compiled in)
   64: Test api io                                                     : Ok
   65: maps__merge_in                                                  : Ok
   66: Demangle Java                                                   : Ok
   67: Parse and process metrics                                       : Ok
   68: PE file support                                                 : Ok
   69: Event expansion for cgroups                                     : Ok
   70: x86 rdpmc                                                       : Ok
   71: Convert perf time to TSC                                        : Ok
   72: DWARF unwind                                                    : Ok
   73: x86 instruction decoder - new instructions                      : Ok
   74: Intel PT packet decoder                                         : Ok
   75: x86 bp modify                                                   : Ok
   76: probe libc's inet_pton & backtrace it with ping                 : Ok
   77: Use vfs_getname probe to get syscall args filenames             : Ok
   78: Check Arm CoreSight trace data recording and synthesized samples: Skip
   79: build id cache operations                                       : Ok
   80: Add vfs_getname probe to get syscall args filenames             : Ok
   81: Check open filename arg using perf trace + vfs_getname          : Ok
   82: Zstd perf.data compression/decompression                        : Ok
   #
 
   $ git log --oneline -1
   568beb2795 (HEAD -> perf/urgent) perf test: Avoid an msan warning in a copied stack.
   $ time make -C tools/perf build-test
   make: Entering directory '/home/acme/git/perf/tools/perf'
   - tarpkg: ./tests/perf-targz-src-pkg .
               make_with_gtk2_O: make GTK2=1
         make_with_babeltrace_O: make LIBBABELTRACE=1
                     make_doc_O: make doc
               make_no_libbpf_O: make NO_LIBBPF=1
                    make_help_O: make help
            make_no_libbionic_O: make NO_LIBBIONIC=1
                  make_no_sdt_O: make NO_SDT=1
                   make_no_ui_O: make NO_NEWT=1 NO_SLANG=1 NO_GTK2=1
        make_util_pmu_bison_o_O: make util/pmu-bison.o
               make_no_libelf_O: make NO_LIBELF=1
               make_clean_all_O: make clean all
             make_no_demangle_O: make NO_DEMANGLE=1
                 make_install_O: make install
              make_no_libnuma_O: make NO_LIBNUMA=1
    make_install_prefix_slash_O: make install prefix=/tmp/krava/
                    make_tags_O: make tags
                   make_debug_O: make DEBUG=1
              make_no_libperl_O: make NO_LIBPERL=1
             make_install_bin_O: make install-bin
                  make_perf_o_O: make perf.o
          make_install_prefix_O: make install prefix=/tmp/krava
          make_with_clangllvm_O: make LIBCLANGLLVM=1
         make_no_libbpf_DEBUG_O: make NO_LIBBPF=1 DEBUG=1
            make_no_libpython_O: make NO_LIBPYTHON=1
            make_no_backtrace_O: make NO_BACKTRACE=1
                 make_no_gtk2_O: make NO_GTK2=1
            make_with_libpfm4_O: make LIBPFM4=1
          make_no_syscall_tbl_O: make NO_SYSCALL_TABLE=1
                make_no_slang_O: make NO_SLANG=1
              make_no_scripts_O: make NO_LIBPYTHON=1 NO_LIBPERL=1
                 make_no_newt_O: make NO_NEWT=1
            make_no_libcrypto_O: make NO_LIBCRYPTO=1
                 make_minimal_O: make NO_LIBPERL=1 NO_LIBPYTHON=1 NO_NEWT=1 NO_GTK2=1 NO_DEMANGLE=1 NO_LIBELF=1 NO_LIBUNWIND=1 NO_BACKTRACE=1 NO_LIBNUMA=1 NO_LIBAUDIT=1 NO_LIBBIONIC=1 NO_LIBDW_DWARF_UNWIND=1 NO_AUXTRACE=1 NO_LIBBPF=1 NO_LIBCRYPTO=1 NO_SDT=1 NO_JVMTI=1 NO_LIBZSTD=1 NO_LIBCAP=1 NO_SYSCALL_TABLE=1
              make_util_map_o_O: make util/map.o
             make_no_auxtrace_O: make NO_AUXTRACE=1
                  make_static_O: make LDFLAGS=-static NO_PERF_READ_VDSO32=1 NO_PERF_READ_VDSOX32=1 NO_JVMTI=1
   make_no_libdw_dwarf_unwind_O: make NO_LIBDW_DWARF_UNWIND=1
             make_no_libaudit_O: make NO_LIBAUDIT=1
            make_no_libunwind_O: make NO_LIBUNWIND=1
                    make_pure_O: make
   OK
   make: Leaving directory '/home/acme/git/perf/tools/perf'
   $
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Merge tag 'perf-tools-fixes-for-v5.10-2020-11-17' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux

Pull perf tools fixes from Arnaldo Carvalho de Melo:

 - Fix file corruption due to event deletion in 'perf inject'.

 - Update arch/x86/lib/mem{cpy,set}_64.S copies used in 'perf bench mem
   memcpy', silencing perf build warning.

 - Avoid an msan warning in a copied stack in 'perf test'.

 - Correct tracepoint field name "flags" in ARM's CS-ETM hardware
   tracing 'perf test' entry.

 - Update branch sample pattern for cs-etm to cope with excluding guest
   in userspace counting.

 - Don't free "lock_seq_stat" if read_count isn't zero in 'perf lock'.

* tag 'perf-tools-fixes-for-v5.10-2020-11-17' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux:
  perf test: Avoid an msan warning in a copied stack.
  perf inject: Fix file corruption due to event deletion
  perf test: Update branch sample pattern for cs-etm
  perf test: Fix a typo in cs-etm testing
  tools arch: Update arch/x86/lib/mem{cpy,set}_64.S copies used in 'perf bench mem memcpy'
  perf lock: Don't free "lock_seq_stat" if read_count isn't zero
  perf lock: Correct field name "flags"
2020-11-17 10:47:45 -08:00
Zhang Changzhong cb47d16ea2 qed: fix error return code in qed_iwarp_ll2_start()
Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function.

Fixes: 469981b17a ("qed: Add unaligned and packed packet processing")
Fixes: fcb39f6c10 ("qed: Add mpa buffer descriptors for storing and processing mpa fpdus")
Fixes: 1e28eaad07 ("qed: Add iWARP support for fpdu spanned over more than two tcp packets")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>
Acked-by: Michal Kalderon <michal.kalderon@marvell.com>
Link: https://lore.kernel.org/r/1605532033-27373-1-git-send-email-zhangchangzhong@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-17 10:40:34 -08:00
Linus Torvalds 9dacf44c38 Merge branch 'urgent-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu
Pull RCU fix from Paul McKenney:
 "A single commit that fixes a bug that was introduced a couple of merge
  windows ago, but which rather more recently converged to an
  agreed-upon fix. The bug is that interrupts can be incorrectly enabled
  while holding an irq-disabled spinlock. This can of course result in
  self-deadlocks.

  The bug is a bit difficult to trigger. It requires that a preempted
  task be blocking a preemptible-RCU grace period long enough to trigger
  an RCU CPU stall warning. In addition, an interrupt must occur at just
  the right time, and that interrupt's handler must acquire that same
  irq-disabled spinlock. Still, a deadlock is a deadlock.

  Furthermore, we do now have a fix, and that fix survives kernel test
  robot, -next, and rcutorture testing. It has also been verified by
  Sebastian as fixing the bug. Therefore..."

* 'urgent-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu:
  rcu: Don't invoke try_invoke_on_locked_down_task() with irqs disabled
2020-11-17 10:31:56 -08:00
Xiongfeng Wang 6654b57866 drm/sun4i: dw-hdmi: fix error return code in sun8i_dw_hdmi_bind()
Fix to return a negative error code from the error handling case instead
of 0 in function sun8i_dw_hdmi_bind().

Fixes: b7c7436a5f ("drm/sun4i: Implement A83T HDMI driver")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Xiongfeng Wang <wangxiongfeng2@huawei.com>
Reviewed-by: Jernej Skrabec <jernej.skrabec@siol.net>
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
Link: https://patchwork.freedesktop.org/patch/msgid/1605488969-5211-1-git-send-email-wangxiongfeng2@huawei.com
2020-11-17 18:23:00 +01:00
Lukas Wunner 04a9cd51d3
spi: npcm-fiu: Don't leak SPI master in probe error path
If the calls to of_match_device(), of_alias_get_id(),
devm_ioremap_resource(), devm_regmap_init_mmio() or devm_clk_get()
fail on probe of the NPCM FIU SPI driver, the spi_controller struct is
erroneously not freed.

Fix by switching over to the new devm_spi_alloc_master() helper.

Fixes: ace55c411b ("spi: npcm-fiu: add NPCM FIU controller driver")
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Cc: <stable@vger.kernel.org> # v5.4+: 5e844cc37a: spi: Introduce device-managed SPI controller allocation
Cc: <stable@vger.kernel.org> # v5.4+
Cc: Tomer Maimon <tmaimon77@gmail.com>
Link: https://lore.kernel.org/r/a420c23a363a3bc9aa684c6e790c32a8af106d17.1605512876.git.lukas@wunner.de
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-11-17 17:08:39 +00:00
Serge Semin a41b0ad07b
spi: dw: Set transfer handler before unmasking the IRQs
It turns out the IRQs most like can be unmasked before the controller is
enabled with no problematic consequences. The manual doesn't explicitly
state that, but the examples perform the controller initialization
procedure in that order. So the commit da8f58909e ("spi: dw: Unmask IRQs
after enabling the chip") hasn't been that required as I thought. But
anyway setting the IRQs up after the chip enabling still worth adding
since it has simplified the code a bit. The problem is that it has
introduced a potential bug. The transfer handler pointer is now
initialized after the IRQs are enabled. That may and eventually will cause
an invalid or uninitialized callback invocation. Fix that just by
performing the callback initialization before the IRQ unmask procedure.

Fixes: da8f58909e ("spi: dw: Unmask IRQs after enabling the chip")
Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Link: https://lore.kernel.org/r/20201117094054.4696-1-Sergey.Semin@baikalelectronics.ru
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-11-17 17:08:39 +00:00
Laurent Pinchart dc293f2106 xtensa: uaccess: Add missing __user to strncpy_from_user() prototype
When adding __user annotations in commit 2adf5352a3, the
strncpy_from_user() function declaration for the
CONFIG_GENERIC_STRNCPY_FROM_USER case was missed. Fix it.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Message-Id: <20200831210937.17938-1-laurent.pinchart@ideasonboard.com>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2020-11-17 05:09:28 -08:00
Joakim Tjernlund 54a2a3898f ALSA: usb-audio: Add delay quirk for all Logitech USB devices
Found one more Logitech device, BCC950 ConferenceCam, which needs
the same delay here. This makes 3 out of 3 devices I have tried.

Therefore, add a delay for all Logitech devices as it does not hurt.

Signed-off-by: Joakim Tjernlund <joakim.tjernlund@infinera.com>
Cc: <stable@vger.kernel.org> # 4.19.y, 5.4.y
Link: https://lore.kernel.org/r/20201117122803.24310-1-joakim.tjernlund@infinera.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2020-11-17 13:47:09 +01:00
Rafael J. Wysocki 14c620cf2e Merge branch 'cpufreq/arm/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm
Pull cpufreq-arm fixes for 5.10-rc5 from Viresh Kumar:

"- tegra186: Fix ->get() callback.
 - arm/scmi: Add dummy clock provider to fix failure."

* 'cpufreq/arm/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/pm:
  cpufreq: scmi: Fix OPP addition failure with a dummy clock provider
  cpufreq: tegra186: Fix get frequency callback
2020-11-17 13:25:06 +01:00
Sami Tolvanen ebd19fc372 perf/x86: fix sysfs type mismatches
This change switches rapl to use PMU_FORMAT_ATTR, and fixes two other
macros to use device_attribute instead of kobj_attribute to avoid
callback type mismatches that trip indirect call checking with Clang's
Control-Flow Integrity (CFI).

Reported-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lkml.kernel.org/r/20201113183126.1239404-1-samitolvanen@google.com
2020-11-17 13:15:38 +01:00
Boqun Feng 43be4388e9 lockdep: Put graph lock/unlock under lock_recursion protection
A warning was hit when running xfstests/generic/068 in a Hyper-V guest:

[...] ------------[ cut here ]------------
[...] DEBUG_LOCKS_WARN_ON(lockdep_hardirqs_enabled())
[...] WARNING: CPU: 2 PID: 1350 at kernel/locking/lockdep.c:5280 check_flags.part.0+0x165/0x170
[...] ...
[...] Workqueue: events pwq_unbound_release_workfn
[...] RIP: 0010:check_flags.part.0+0x165/0x170
[...] ...
[...] Call Trace:
[...]  lock_is_held_type+0x72/0x150
[...]  ? lock_acquire+0x16e/0x4a0
[...]  rcu_read_lock_sched_held+0x3f/0x80
[...]  __send_ipi_one+0x14d/0x1b0
[...]  hv_send_ipi+0x12/0x30
[...]  __pv_queued_spin_unlock_slowpath+0xd1/0x110
[...]  __raw_callee_save___pv_queued_spin_unlock_slowpath+0x11/0x20
[...]  .slowpath+0x9/0xe
[...]  lockdep_unregister_key+0x128/0x180
[...]  pwq_unbound_release_workfn+0xbb/0xf0
[...]  process_one_work+0x227/0x5c0
[...]  worker_thread+0x55/0x3c0
[...]  ? process_one_work+0x5c0/0x5c0
[...]  kthread+0x153/0x170
[...]  ? __kthread_bind_mask+0x60/0x60
[...]  ret_from_fork+0x1f/0x30

The cause of the problem is we have call chain lockdep_unregister_key()
-> <irq disabled by raw_local_irq_save()> lockdep_unlock() ->
arch_spin_unlock() -> __pv_queued_spin_unlock_slowpath() -> pv_kick() ->
__send_ipi_one() -> trace_hyperv_send_ipi_one().

Although this particular warning is triggered because Hyper-V has a
trace point in ipi sending, but in general arch_spin_unlock() may call
another function having a trace point in it, so put the arch_spin_lock()
and arch_spin_unlock() after lock_recursion protection to fix this
problem and avoid similiar problems.

Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20201113110512.1056501-1-boqun.feng@gmail.com
2020-11-17 13:15:35 +01:00
Juri Lelli 2279f540ea sched/deadline: Fix priority inheritance with multiple scheduling classes
Glenn reported that "an application [he developed produces] a BUG in
deadline.c when a SCHED_DEADLINE task contends with CFS tasks on nested
PTHREAD_PRIO_INHERIT mutexes.  I believe the bug is triggered when a CFS
task that was boosted by a SCHED_DEADLINE task boosts another CFS task
(nested priority inheritance).

 ------------[ cut here ]------------
 kernel BUG at kernel/sched/deadline.c:1462!
 invalid opcode: 0000 [#1] PREEMPT SMP
 CPU: 12 PID: 19171 Comm: dl_boost_bug Tainted: ...
 Hardware name: ...
 RIP: 0010:enqueue_task_dl+0x335/0x910
 Code: ...
 RSP: 0018:ffffc9000c2bbc68 EFLAGS: 00010002
 RAX: 0000000000000009 RBX: ffff888c0af94c00 RCX: ffffffff81e12500
 RDX: 000000000000002e RSI: ffff888c0af94c00 RDI: ffff888c10b22600
 RBP: ffffc9000c2bbd08 R08: 0000000000000009 R09: 0000000000000078
 R10: ffffffff81e12440 R11: ffffffff81e1236c R12: ffff888bc8932600
 R13: ffff888c0af94eb8 R14: ffff888c10b22600 R15: ffff888bc8932600
 FS:  00007fa58ac55700(0000) GS:ffff888c10b00000(0000) knlGS:0000000000000000
 CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 CR2: 00007fa58b523230 CR3: 0000000bf44ab003 CR4: 00000000007606e0
 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
 PKRU: 55555554
 Call Trace:
  ? intel_pstate_update_util_hwp+0x13/0x170
  rt_mutex_setprio+0x1cc/0x4b0
  task_blocks_on_rt_mutex+0x225/0x260
  rt_spin_lock_slowlock_locked+0xab/0x2d0
  rt_spin_lock_slowlock+0x50/0x80
  hrtimer_grab_expiry_lock+0x20/0x30
  hrtimer_cancel+0x13/0x30
  do_nanosleep+0xa0/0x150
  hrtimer_nanosleep+0xe1/0x230
  ? __hrtimer_init_sleeper+0x60/0x60
  __x64_sys_nanosleep+0x8d/0xa0
  do_syscall_64+0x4a/0x100
  entry_SYSCALL_64_after_hwframe+0x49/0xbe
 RIP: 0033:0x7fa58b52330d
 ...
 ---[ end trace 0000000000000002 ]—

He also provided a simple reproducer creating the situation below:

 So the execution order of locking steps are the following
 (N1 and N2 are non-deadline tasks. D1 is a deadline task. M1 and M2
 are mutexes that are enabled * with priority inheritance.)

 Time moves forward as this timeline goes down:

 N1              N2               D1
 |               |                |
 |               |                |
 Lock(M1)        |                |
 |               |                |
 |             Lock(M2)           |
 |               |                |
 |               |              Lock(M2)
 |               |                |
 |             Lock(M1)           |
 |             (!!bug triggered!) |

Daniel reported a similar situation as well, by just letting ksoftirqd
run with DEADLINE (and eventually block on a mutex).

Problem is that boosted entities (Priority Inheritance) use static
DEADLINE parameters of the top priority waiter. However, there might be
cases where top waiter could be a non-DEADLINE entity that is currently
boosted by a DEADLINE entity from a different lock chain (i.e., nested
priority chains involving entities of non-DEADLINE classes). In this
case, top waiter static DEADLINE parameters could be null (initialized
to 0 at fork()) and replenish_dl_entity() would hit a BUG().

Fix this by keeping track of the original donor and using its parameters
when a task is boosted.

Reported-by: Glenn Elliott <glenn@aurora.tech>
Reported-by: Daniel Bristot de Oliveira <bristot@redhat.com>
Signed-off-by: Juri Lelli <juri.lelli@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Daniel Bristot de Oliveira <bristot@redhat.com>
Link: https://lkml.kernel.org/r/20201117061432.517340-1-juri.lelli@redhat.com
2020-11-17 13:15:28 +01:00
Peter Zijlstra ec618b84f6 sched: Fix rq->nr_iowait ordering
schedule()				ttwu()
    deactivate_task();			  if (p->on_rq && ...) // false
					    atomic_dec(&task_rq(p)->nr_iowait);
    if (prev->in_iowait)
      atomic_inc(&rq->nr_iowait);

Allows nr_iowait to be decremented before it gets incremented,
resulting in more dodgy IO-wait numbers than usual.

Note that because we can now do ttwu_queue_wakelist() before
p->on_cpu==0, we lose the natural ordering and have to further delay
the decrement.

Fixes: c6e7bd7afa ("sched/core: Optimize ttwu() spinning on p->on_cpu")
Reported-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Mel Gorman <mgorman@techsingularity.net>
Link: https://lkml.kernel.org/r/20201117093829.GD3121429@hirez.programming.kicks-ass.net
2020-11-17 13:15:28 +01:00
Peter Zijlstra f97bb5272d sched: Fix data-race in wakeup
Mel reported that on some ARM64 platforms loadavg goes bananas and
Will tracked it down to the following race:

  CPU0					CPU1

  schedule()
    prev->sched_contributes_to_load = X;
    deactivate_task(prev);

					try_to_wake_up()
					  if (p->on_rq &&) // false
					  if (smp_load_acquire(&p->on_cpu) && // true
					      ttwu_queue_wakelist())
					        p->sched_remote_wakeup = Y;

    smp_store_release(prev->on_cpu, 0);

where both p->sched_contributes_to_load and p->sched_remote_wakeup are
in the same word, and thus the stores X and Y race (and can clobber
one another's data).

Whereas prior to commit c6e7bd7afa ("sched/core: Optimize ttwu()
spinning on p->on_cpu") the p->on_cpu handoff serialized access to
p->sched_remote_wakeup (just as it still does with
p->sched_contributes_to_load) that commit broke that by calling
ttwu_queue_wakelist() with p->on_cpu != 0.

However, due to

  p->XXX = X			ttwu()
  schedule()			  if (p->on_rq && ...) // false
    smp_mb__after_spinlock()	  if (smp_load_acquire(&p->on_cpu) &&
    deactivate_task()		      ttwu_queue_wakelist())
      p->on_rq = 0;		        p->sched_remote_wakeup = Y;

We can be sure any 'current' store is complete and 'current' is
guaranteed asleep. Therefore we can move p->sched_remote_wakeup into
the current flags word.

Note: while the observed failure was loadavg accounting gone wrong due
to ttwu() cobbering p->sched_contributes_to_load, the reverse problem
is also possible where schedule() clobbers p->sched_remote_wakeup,
this could result in enqueue_entity() wrecking ->vruntime and causing
scheduling artifacts.

Fixes: c6e7bd7afa ("sched/core: Optimize ttwu() spinning on p->on_cpu")
Reported-by: Mel Gorman <mgorman@techsingularity.net>
Debugged-by: Will Deacon <will@kernel.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20201117083016.GK3121392@hirez.programming.kicks-ass.net
2020-11-17 13:15:27 +01:00
Quentin Perret 8e1ac4299a sched/fair: Fix overutilized update in enqueue_task_fair()
enqueue_task_fair() attempts to skip the overutilized update for new
tasks as their util_avg is not accurate yet. However, the flag we check
to do so is overwritten earlier on in the function, which makes the
condition pretty much a nop.

Fix this by saving the flag early on.

Fixes: 2802bf3cd9 ("sched/fair: Add over-utilization/tipping point indicator")
Reported-by: Rick Yiu <rickyiu@google.com>
Signed-off-by: Quentin Perret <qperret@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Vincent Guittot <vincent.guittot@linaro.org>
Reviewed-by: Valentin Schneider <valentin.schneider@arm.com>
Link: https://lkml.kernel.org/r/20201112111201.2081902-1-qperret@google.com
2020-11-17 13:15:27 +01:00
Zhang Qilong ac3b57adf8 MIPS: Alchemy: Fix memleak in alchemy_clk_setup_cpu
If the clk_register fails, we should free h before
function returns to prevent memleak.

Fixes: 474402291a ("MIPS: Alchemy: clock framework integration of onchip clocks")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zhang Qilong <zhangqilong3@huawei.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
2020-11-17 12:53:57 +01:00
Manish Narani d06d60d52e mmc: sdhci-of-arasan: Issue DLL reset explicitly
In the current implementation DLL reset will be issued for
each ITAP and OTAP setting inside ATF, this is creating issues
in some scenarios and this sequence is not inline with the TRM.
To fix the issue, DLL reset should be removed from the ATF and
host driver will request it explicitly.
This patch update host driver to explicitly request for DLL reset
before ITAP (assert DLL) and after OTAP (release DLL) settings.

Fixes: a5c8b2ae2e ("mmc: sdhci-of-arasan: Add support for ZynqMP Platform Tap Delays Setup")
Signed-off-by: Sai Krishna Potthuri <lakshmi.sai.krishna.potthuri@xilinx.com>
Signed-off-by: Manish Narani <manish.narani@xilinx.com>
Acked-by: Michal Simek <michal.simek@xilinx.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/1605515565-117562-4-git-send-email-manish.narani@xilinx.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2020-11-17 12:44:44 +01:00
Manish Narani d338c6d01d mmc: sdhci-of-arasan: Use Mask writes for Tap delays
Mask the ITAP and OTAP delay bits before updating with the new
tap value for Versal platform.

Fixes: 1a470721c8 ("sdhci: arasan: Add support for Versal Tap Delays")
Signed-off-by: Sai Krishna Potthuri <lakshmi.sai.krishna.potthuri@xilinx.com>
Signed-off-by: Manish Narani <manish.narani@xilinx.com>
Acked-by: Michal Simek <michal.simek@xilinx.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/1605515565-117562-3-git-send-email-manish.narani@xilinx.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2020-11-17 12:44:40 +01:00
Manish Narani 9e95343293 mmc: sdhci-of-arasan: Allow configuring zero tap values
Allow configuring the Output and Input tap values with zero to avoid
failures in some cases (one of them is SD boot mode) where the output
and input tap values may be already set to non-zero.

Fixes: a5c8b2ae2e ("mmc: sdhci-of-arasan: Add support for ZynqMP Platform Tap Delays Setup")
Signed-off-by: Sai Krishna Potthuri <lakshmi.sai.krishna.potthuri@xilinx.com>
Signed-off-by: Manish Narani <manish.narani@xilinx.com>
Acked-by: Michal Simek <michal.simek@xilinx.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/1605515565-117562-2-git-send-email-manish.narani@xilinx.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2020-11-17 12:43:47 +01:00
Adrian Hunter 60d5356610 mmc: sdhci-pci: Prefer SDR25 timing for High Speed mode for BYT-based Intel controllers
A UHS setting of SDR25 can give better results for High Speed mode.
This is because there is no setting corresponding to high speed.  Currently
SDHCI sets no value, which means zero which is also the setting for SDR12.
There was an attempt to change this in sdhci.c but it caused problems for
some drivers, so it was reverted and the change was made to sdhci-brcmstb
in commit 2fefc7c5f7 ("mmc: sdhci-brcmstb: Fix incorrect switch to HS
mode").  Several other drivers also do this.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: stable@vger.kernel.org # v5.4+
Link: https://lore.kernel.org/r/20201112133656.20317-1-adrian.hunter@intel.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
2020-11-17 12:33:06 +01:00
Greg Kroah-Hartman 2dde2821b5 First set of IIO and counter fixes for the 5.10 cycle.
IIO
 
 cros_ec
  - Provide defauts for max and min frequency when older machines fail
    to return them correctly.
 ingenic-adc
  - Fix wrong vref value for JZ4770 SoC
  - Fix AUX / VBAT readings when touchscreen in use by pausing touchscreen
    readings during a read of these channels.
 kxcjk1013
  - Fix an issue with KIOX010A ACPI id using devices which need to run
    a ACPI device specific method to avoid leaving the keyboard disabled.
    Includes a minor precursor patch to make this fix easier to do.
 mt6577-auxadc
  - Fix an issue with dev_comp not being set resulting in a null ptr deref.
 st_lsm6dsx
  - Set a 10ms min shub slave timeout to handle fast snesors where more time
    is needed to set up the config than the cycles allowed.
 stm32-adc
  - Fix an issue due to a clash between an ADC configured to use IRQs and
    a second configured to use DMA cause by some incorrect register masking.
 vcnl4035
  - Kconfig missing dependency
 
 Counter
 
 ti-eqep
  - wrong value for max_register as one beyond the end instead of the end.
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Merge tag 'iio-fixes-for-5.10a' of https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-linus

Jonathan writes:

First set of IIO and counter fixes for the 5.10 cycle.

IIO

cros_ec
 - Provide defauts for max and min frequency when older machines fail
   to return them correctly.
ingenic-adc
 - Fix wrong vref value for JZ4770 SoC
 - Fix AUX / VBAT readings when touchscreen in use by pausing touchscreen
   readings during a read of these channels.
kxcjk1013
 - Fix an issue with KIOX010A ACPI id using devices which need to run
   a ACPI device specific method to avoid leaving the keyboard disabled.
   Includes a minor precursor patch to make this fix easier to do.
mt6577-auxadc
 - Fix an issue with dev_comp not being set resulting in a null ptr deref.
st_lsm6dsx
 - Set a 10ms min shub slave timeout to handle fast snesors where more time
   is needed to set up the config than the cycles allowed.
stm32-adc
 - Fix an issue due to a clash between an ADC configured to use IRQs and
   a second configured to use DMA cause by some incorrect register masking.
vcnl4035
 - Kconfig missing dependency

Counter

ti-eqep
 - wrong value for max_register as one beyond the end instead of the end.

* tag 'iio-fixes-for-5.10a' of https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio:
  iio: accel: kxcjk1013: Add support for KIOX010A ACPI DSM for setting tablet-mode
  iio: accel: kxcjk1013: Replace is_smo8500_device with an acpi_type enum
  iio: light: fix kconfig dependency bug for VCNL4035
  iio/adc: ingenic: Fix AUX/VBAT readings when touchscreen is used
  iio/adc: ingenic: Fix battery VREF for JZ4770 SoC
  iio: imu: st_lsm6dsx: set 10ms as min shub slave timeout
  counter/ti-eqep: Fix regmap max_register
  iio: adc: stm32-adc: fix a regression when using dma and irq
  iio: adc: mediatek: fix unset field
  iio: cros_ec: Use default frequencies when EC returns invalid information
2020-11-17 10:53:00 +01:00
Chen Yu 1a371e67dc x86/microcode/intel: Check patch signature before saving microcode for early loading
Currently, scan_microcode() leverages microcode_matches() to check
if the microcode matches the CPU by comparing the family and model.
However, the processor stepping and flags of the microcode signature
should also be considered when saving a microcode patch for early
update.

Use find_matching_signature() in scan_microcode() and get rid of the
now-unused microcode_matches() which is a good cleanup in itself.

Complete the verification of the patch being saved for early loading in
save_microcode_patch() directly. This needs to be done there too because
save_mc_for_early() will call save_microcode_patch() too.

The second reason why this needs to be done is because the loader still
tries to support, at least hypothetically, mixed-steppings systems and
thus adds all patches to the cache that belong to the same CPU model
albeit with different steppings.

For example:

  microcode: CPU: sig=0x906ec, pf=0x2, rev=0xd6
  microcode: mc_saved[0]: sig=0x906e9, pf=0x2a, rev=0xd6, total size=0x19400, date = 2020-04-23
  microcode: mc_saved[1]: sig=0x906ea, pf=0x22, rev=0xd6, total size=0x19000, date = 2020-04-27
  microcode: mc_saved[2]: sig=0x906eb, pf=0x2, rev=0xd6, total size=0x19400, date = 2020-04-23
  microcode: mc_saved[3]: sig=0x906ec, pf=0x22, rev=0xd6, total size=0x19000, date = 2020-04-27
  microcode: mc_saved[4]: sig=0x906ed, pf=0x22, rev=0xd6, total size=0x19400, date = 2020-04-23

The patch which is being saved for early loading, however, can only be
the one which fits the CPU this runs on so do the signature verification
before saving.

 [ bp: Do signature verification in save_microcode_patch()
       and rewrite commit message. ]

Fixes: ec400ddeff ("x86/microcode_intel_early.c: Early update ucode on Intel's CPU")
Signed-off-by: Chen Yu <yu.c.chen@intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: stable@vger.kernel.org
Link: https://bugzilla.kernel.org/show_bug.cgi?id=208535
Link: https://lkml.kernel.org/r/20201113015923.13960-1-yu.c.chen@intel.com
2020-11-17 10:33:18 +01:00
Thomas Bogendoerfer 61a2f1aecf MIPS: kernel: Fix for_each_memblock conversion
The loop over all memblocks works with PFNs and not physical
addresses, so we need for_each_mem_pfn_range().

Fixes: b10d6bca87 ("arch, drivers: replace for_each_membock() with for_each_mem_range()")
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Reviewed-by: Mike Rapoport <rppt@linux.ibm.com>
Reviewed-by: Serge Semin <fancer.lancer@gmail.com>
2020-11-17 10:31:31 +01:00
Sudeep Holla 8410e7f3b3 cpufreq: scmi: Fix OPP addition failure with a dummy clock provider
Commit dd461cd918 ("opp: Allow dev_pm_opp_get_opp_table() to return
-EPROBE_DEFER") handles -EPROBE_DEFER for the clock/interconnects within
_allocate_opp_table() which is called from dev_pm_opp_add and it
now propagates the error back to the caller.

SCMI performance domain re-used clock bindings to keep it simple. However
with the above mentioned change, if clock property is present in a device
node, opps fails to get added with below errors until clk_get succeeds.

 cpu0: failed to add opp 450000000Hz
 cpu0: failed to add opps to the device
 ....(errors on cpu1-cpu4)
 cpu5: failed to add opp 450000000Hz
 cpu5: failed to add opps to the device

So, in order to fix the issue, we need to register dummy clock provider.
With the dummy clock provider, clk_get returns NULL(no errors!), then opp
core proceeds to add OPPs for the CPUs.

Cc: Rafael J. Wysocki <rjw@rjwysocki.net>
Fixes: dd461cd918 ("opp: Allow dev_pm_opp_get_opp_table() to return -EPROBE_DEFER")
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2020-11-17 10:04:28 +05:30
Jon Hunter e010d1d25e cpufreq: tegra186: Fix get frequency callback
Commit b89c01c960 ("cpufreq: tegra186: Fix initial frequency")
implemented the CPUFREQ 'get' callback to determine the current
operating frequency for each CPU. This implementation used a simple
looked up to determine the current operating frequency. The problem
with this is that frequency table for different Tegra186 devices may
vary and so the default boot frequency for Tegra186 device may or may
not be present in the frequency table. If the default boot frequency is
not present in the frequency table, this causes the function
tegra186_cpufreq_get() to return 0 and in turn causes cpufreq_online()
to fail which prevents CPUFREQ from working.

Fix this by always calculating the CPU frequency based upon the current
'ndiv' setting for the CPU. Note that the CPU frequency for Tegra186 is
calculated by reading the current 'ndiv' setting, multiplying by the
CPU reference clock and dividing by a constant divisor.

Fixes: b89c01c960 ("cpufreq: tegra186: Fix initial frequency")

Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
2020-11-17 10:04:21 +05:30
Mike Christie f36199355c scsi: target: iscsi: Fix cmd abort fabric stop race
Maurizio found a race where the abort and cmd stop paths can race as
follows:

 1. thread1 runs iscsit_release_commands_from_conn and sets
    CMD_T_FABRIC_STOP.

 2. thread2 runs iscsit_aborted_task and then does __iscsit_free_cmd. It
    then returns from the aborted_task callout and we finish
    target_handle_abort and do:

    target_handle_abort -> transport_cmd_check_stop_to_fabric ->
	lio_check_stop_free -> target_put_sess_cmd

    The cmd is now freed.

 3. thread1 now finishes iscsit_release_commands_from_conn and runs
    iscsit_free_cmd while accessing a command we just released.

In __target_check_io_state we check for CMD_T_FABRIC_STOP and set the
CMD_T_ABORTED if the driver is not cleaning up the cmd because of a session
shutdown. However, iscsit_release_commands_from_conn only sets the
CMD_T_FABRIC_STOP and does not check to see if the abort path has claimed
completion ownership of the command.

This adds a check in iscsit_release_commands_from_conn so only the abort or
fabric stop path cleanup the command.

Link: https://lore.kernel.org/r/1605318378-9269-1-git-send-email-michael.christie@oracle.com
Reported-by: Maurizio Lombardi <mlombard@redhat.com>
Reviewed-by: Maurizio Lombardi <mlombard@redhat.com>
Signed-off-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-11-16 23:34:18 -05:00
Lee Duncan fe0a8a95e7 scsi: libiscsi: Fix NOP race condition
iSCSI NOPs are sometimes "lost", mistakenly sent to the user-land iscsid
daemon instead of handled in the kernel, as they should be, resulting in a
message from the daemon like:

  iscsid: Got nop in, but kernel supports nop handling.

This can occur because of the new forward- and back-locks, and the fact
that an iSCSI NOP response can occur before processing of the NOP send is
complete. This can result in "conn->ping_task" being NULL in
iscsi_nop_out_rsp(), when the pointer is actually in the process of being
set.

To work around this, we add a new state to the "ping_task" pointer. In
addition to NULL (not assigned) and a pointer (assigned), we add the state
"being set", which is signaled with an INVALID pointer (using "-1").

Link: https://lore.kernel.org/r/20201106193317.16993-1-leeman.duncan@gmail.com
Reviewed-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Lee Duncan <lduncan@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2020-11-16 22:32:50 -05:00
Jakub Kicinski d5bd32a876 Merge branch 'bnxt_en-bug-fixes'
Michael Chan says:

====================
bnxt_en: Bug fixes.

This first patch fixes a module eeprom A2h addressing issue.  The next
2 patches fix counter related issues.  The last one skips an
unsupported firmware call on the VF to avoid the error log.
====================

Link: https://lore.kernel.org/r/1605486472-28156-1-git-send-email-michael.chan@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-16 17:39:49 -08:00
Vasundhara Volam 0ae0a779ef bnxt_en: Avoid unnecessary NVM_GET_DEV_INFO cmd error log on VFs.
VFs do not have access permissions to issue NVM_GET_DEV_INFO
firmware command.

Fixes: 4933f6753b ("bnxt_en: Add bnxt_hwrm_nvm_get_dev_info() to query NVM info.")
Signed-off-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-16 17:39:47 -08:00
Michael Chan fa97f303fa bnxt_en: Fix counter overflow logic.
bnxt_add_one_ctr() adds a hardware counter to a software counter and
adjusts for the hardware counter wraparound against the mask.  The logic
assumes that the hardware counter is always smaller than or equal to
the mask.

This assumption is mostly correct.  But in some cases if the firmware
is older and does not provide the accurate mask, the driver can use
a mask that is smaller than the actual hardware mask.  This can cause
some extra carry bits to be added to the software counter, resulting in
counters that far exceed the actual value.  Fix it by masking the
hardware counter with the mask passed into bnxt_add_one_ctr().

Fixes: fea6b33355 ("bnxt_en: Accumulate all counters.")
Reviewed-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Reviewed-by: Edwin Peer <edwin.peer@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-16 17:39:46 -08:00
Michael Chan eba93de6d3 bnxt_en: Free port stats during firmware reset.
Firmware is unable to retain the port counters during any kind of
fatal or non-fatal resets, so we must clear the port counters to
avoid false detection of port counter overflow.

Fixes: fea6b33355 ("bnxt_en: Accumulate all counters.")
Reviewed-by: Edwin Peer <edwin.peer@broadcom.com>
Reviewed-by: Vasundhara Volam <vasundhara-v.volam@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-16 17:39:46 -08:00
Edwin Peer 4260330b32 bnxt_en: read EEPROM A2h address using page 0
The module eeprom address range returned by bnxt_get_module_eeprom()
should be 256 bytes of A0h address space, the lower half of the A2h
address space, and page 0 for the upper half of the A2h address space.

Fix the firmware call by passing page_number 0 for the A2h slave address
space.

Fixes: 42ee18fe4c ("bnxt_en: Add Support for ETHTOOL_GMODULEINFO and ETHTOOL_GMODULEEEPRO")
Signed-off-by: Edwin Peer <edwin.peer@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-16 17:39:46 -08:00
Alex Elder 064c9c32b1 net: ipa: lock when freeing transaction
Transactions sit on one of several lists, depending on their state
(allocated, pending, complete, or polled).  A spinlock protects
against concurrent access when transactions are moved between these
lists.

Transactions are also reference counted.  A newly-allocated
transaction has an initial count of 1; a transaction is released in
gsi_trans_free() only if its decremented reference count reaches 0.
Releasing a transaction includes removing it from the polled (or if
unused, allocated) list, so the spinlock is acquired when we release
a transaction.

The reference count is used to allow a caller to synchronously wait
for a committed transaction to complete.  In this case, the waiter
takes an extra reference to the transaction *before* committing it
(so it won't be freed), and releases its reference (calls
gsi_trans_free()) when it is done with it.

Similarly, gsi_channel_update() takes an extra reference to ensure a
transaction isn't released before the function is done operating on
it.  Until the transaction is moved to the completed list (by this
function) it won't be freed, so this reference is taken "safely."

But in the quiesce path, we want to wait for the "last" transaction,
which we find in the completed or polled list.  Transactions on
these lists can be freed at any time, so we (try to) prevent that
by taking the reference while holding the spinlock.

Currently gsi_trans_free() decrements a transaction's reference
count unconditionally, acquiring the lock to remove the transaction
from its list *only* when the count reaches 0.  This does not
protect the quiesce path, which depends on the lock to ensure its
extra reference prevents release of the transaction.

Fix this by only dropping the last reference to a transaction
in gsi_trans_free() while holding the spinlock.

Fixes: 9dd441e4ed ("soc: qcom: ipa: GSI transactions")
Reported-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Alex Elder <elder@linaro.org>
Link: https://lore.kernel.org/r/20201114182017.28270-1-elder@linaro.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-16 17:32:22 -08:00
Vadim Fedorenko 3fe16edf67 net/tls: fix corrupted data in recvmsg
If tcp socket has more data than Encrypted Handshake Message then
tls_sw_recvmsg will try to decrypt next record instead of returning
full control message to userspace as mentioned in comment. The next
message - usually Application Data - gets corrupted because it uses
zero copy for decryption that's why the data is not stored in skb
for next iteration. Revert check to not decrypt next record if
current is not Application Data.

Fixes: 692d7b5d1f ("tls: Fix recvmsg() to be able to peek across multiple records")
Signed-off-by: Vadim Fedorenko <vfedorenko@novek.ru>
Link: https://lore.kernel.org/r/1605413760-21153-1-git-send-email-vfedorenko@novek.ru
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-16 17:11:02 -08:00
Subash Abhinov Kasiviswanathan fc70f5bf5e net: qualcomm: rmnet: Fix incorrect receive packet handling during cleanup
During rmnet unregistration, the real device rx_handler is first cleared
followed by the removal of rx_handler_data after the rcu synchronization.

Any packets in the receive path may observe that the rx_handler is NULL.
However, there is no check when dereferencing this value to use the
rmnet_port information.

This fixes following splat by adding the NULL check.

Unable to handle kernel NULL pointer dereference at virtual
address 000000000000000d
pc : rmnet_rx_handler+0x124/0x284
lr : rmnet_rx_handler+0x124/0x284
 rmnet_rx_handler+0x124/0x284
 __netif_receive_skb_core+0x758/0xd74
 __netif_receive_skb+0x50/0x17c
 process_backlog+0x15c/0x1b8
 napi_poll+0x88/0x284
 net_rx_action+0xbc/0x23c
 __do_softirq+0x20c/0x48c

Fixes: ceed73a2cf ("drivers: net: ethernet: qualcomm: rmnet: Initial implementation")
Signed-off-by: Sean Tranchetti <stranche@codeaurora.org>
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Link: https://lore.kernel.org/r/1605298325-3705-1-git-send-email-subashab@codeaurora.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-16 16:34:49 -08:00
Lorenzo Bianconi 9c79a8ab5f net: mvneta: fix possible memory leak in mvneta_swbm_add_rx_fragment
Recycle the page running page_pool_put_full_page() in
mvneta_swbm_add_rx_fragment routine when the last descriptor
contains just the FCS or if the received packet contains more than
MAX_SKB_FRAGS fragments

Fixes: ca0e014609 ("net: mvneta: move skb build after descriptors processing")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://lore.kernel.org/r/df6a2bad70323ee58d3901491ada31c1ca2a40b9.1605291228.git.lorenzo@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-16 16:30:50 -08:00
Wong Vee Khee 8e5debed39 net: stmmac: Use rtnl_lock/unlock on netif_set_real_num_rx_queues() call
Fix an issue where dump stack is printed on suspend resume flow due to
netif_set_real_num_rx_queues() is not called with rtnl_lock held().

Fixes: 686cff3d70 ("net: stmmac: Fix incorrect location to set real_num_rx|tx_queues")
Reported-by: Christophe ROULLIER <christophe.roullier@st.com>
Tested-by: Christophe ROULLIER <christophe.roullier@st.com>
Cc: Alexandre TORGUE <alexandre.torgue@st.com>
Reviewed-by: Ong Boon Leong <boon.leong.ong@intel.com>
Signed-off-by: Wong Vee Khee <vee.khee.wong@intel.com>
Link: https://lore.kernel.org/r/20201115074210.23605-1-vee.khee.wong@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-16 16:12:36 -08:00
Heiner Kallweit 7a30ecc923 net: bridge: add missing counters to ndo_get_stats64 callback
In br_forward.c and br_input.c fields dev->stats.tx_dropped and
dev->stats.multicast are populated, but they are ignored in
ndo_get_stats64.

Fixes: 28172739f0 ("net: fix 64 bit counters on 32 bit arches")
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://lore.kernel.org/r/58ea9963-77ad-a7cf-8dfd-fc95ab95f606@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-16 15:47:50 -08:00
Zhang Changzhong 35f735c665 net: ethernet: ti: cpsw: fix error return code in cpsw_probe()
Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function.

Fixes: 83a8471ba2 ("net: ethernet: ti: cpsw: refactor probe to group common hw initialization")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>
Link: https://lore.kernel.org/r/1605250173-18438-1-git-send-email-zhangchangzhong@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-16 15:37:28 -08:00
Zhang Changzhong 661710bfd5 net: stmmac: dwmac-intel-plat: fix error return code in intel_eth_plat_probe()
Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function.

Fixes: 9efc9b2b04 ("net: stmmac: Add dwmac-intel-plat for GBE driver")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>
Link: https://lore.kernel.org/r/1605249243-17262-1-git-send-email-zhangchangzhong@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-16 15:32:30 -08:00
Mark Brown 63fa58d99a
Merge Intel catpt DSP fixes into asoc-5.10 2020-11-16 23:29:07 +00:00
Zhang Changzhong 3beb9be165 qlcnic: fix error return code in qlcnic_83xx_restart_hw()
Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function.

Fixes: 3ced0a88cd ("qlcnic: Add support to run firmware POST")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>
Link: https://lore.kernel.org/r/1605248186-16013-1-git-send-email-zhangchangzhong@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-16 15:26:42 -08:00
Zhang Changzhong cfbaa8b33e cx82310_eth: fix error return code in cx82310_bind()
Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function.

Fixes: ca139d76b0 ("cx82310_eth: re-enable ethernet mode after router reboot")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>
Link: https://lore.kernel.org/r/1605247627-15385-1-git-send-email-zhangchangzhong@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2020-11-16 15:23:44 -08:00
Linus Torvalds 9c87c9f412 ARM: SoC fixes for v5.10, part 2
Around one third of the fixes this time are for dts files that list
 their ethernet controller as using 'phy-mode="rgmii"' but are changed to
 'phy-mode="rgmii-id"' now, because the PHY drivers (realtek, ksz9031,
 dp83867, ...) now configure the internal delay based on that when they
 used to stay on the hardware default.
 
 The long story is archived at
 https://lore.kernel.org/netdev/CAMj1kXEEF_Un-4NTaD5iUN0NoZYaJQn-rPediX0S6oRiuVuW-A@mail.gmail.com/
 I was trying to hold off on the bugfixes until there was a solution that
 would avoid breaking all boards, but that does not seem to be happening
 any time soon, so I am now sending the correct version of the dts files to
 ensure that at least these machines can use their network devices again.
 
 The other changes this time are:
 
 - Updating the MAINTAINER lists for Allwinner and Samsung SoCs
 
 - Multiple i.MX8MN machines get updates for their CPU
   operating points to match the data sheet
 
 - A revert for a dts patch that caused a regression in USB
   support on Odroid U3
 
 - Two fixes for the AMD Tee driver, addressing a memory leak
   and missing locking
 
 - Mark the network subsystem on qoriq-fman3 as cache coherent
   for correctness as better performance.
 
 - Minor dts fixes elsewhere, addressing dtc warnings and similar
   problems
 
 Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Merge tag 'arm-soc-fixes-v5.10-2' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull ARM SoC fixes from Arnd Bergmann:
 "Around one third of the fixes this time are for dts files that list
  their ethernet controller as using 'phy-mode="rgmii"' but are changed
  to 'phy-mode="rgmii-id"' now, because the PHY drivers (realtek,
  ksz9031, dp83867, ...) now configure the internal delay based on that
  when they used to stay on the hardware default.

  The long story is archived at

    https://lore.kernel.org/netdev/CAMj1kXEEF_Un-4NTaD5iUN0NoZYaJQn-rPediX0S6oRiuVuW-A@mail.gmail.com/

  I was trying to hold off on the bugfixes until there was a solution
  that would avoid breaking all boards, but that does not seem to be
  happening any time soon, so I am now sending the correct version of
  the dts files to ensure that at least these machines can use their
  network devices again.

  The other changes this time are:

   - Updating the MAINTAINER lists for Allwinner and Samsung SoCs

   - Multiple i.MX8MN machines get updates for their CPU operating
     points to match the data sheet

   - A revert for a dts patch that caused a regression in USB support on
     Odroid U3

   - Two fixes for the AMD Tee driver, addressing a memory leak and
     missing locking

   - Mark the network subsystem on qoriq-fman3 as cache coherent for
     correctness as better performance.

   - Minor dts fixes elsewhere, addressing dtc warnings and similar
     problems"

* tag 'arm-soc-fixes-v5.10-2' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (48 commits)
  ARM: dts: exynos: revert "add input clock to CMU in Exynos4412 Odroid"
  ARM: dts: imx50-evk: Fix the chip select 1 IOMUX
  arm64: dts: imx8mm: fix voltage for 1.6GHz CPU operating point
  ARM: dts: stm32: Keep VDDA LDO1 always on on DHCOM
  ARM: dts: stm32: Enable thermal sensor support on stm32mp15xx-dhcor
  ARM: dts: stm32: Define VIO regulator supply on DHCOM
  ARM: dts: stm32: Fix LED5 on STM32MP1 DHCOM PDK2
  ARM: dts: stm32: Fix TA3-GPIO-C key on STM32MP1 DHCOM PDK2
  arm64: dts: renesas: r8a774e1: Add missing audio_clk_b
  tee: amdtee: synchronize access to shm list
  tee: amdtee: fix memory leak due to reset of global shm list
  arm64: dts: agilex/stratix10: Fix qspi node compatible
  ARM: dts: imx6q-prti6q: fix PHY address
  ARM: dts: vf610-zii-dev-rev-b: Fix MDIO over clocking
  arm: dts: imx6qdl-udoo: fix rgmii phy-mode for ksz9031 phy
  arm64: dts imx8mn: Remove non-existent USB OTG2
  arm64: dts: imx8mm-beacon-som: Fix Choppy BT audio
  arm64: dts: fsl: DPAA FMan DMA operations are coherent
  arm64: dts: fsl: fix endianness issue of rcpm
  arm64: dts: imx8mn-evk: fix missing PMIC's interrupt line pull-up
  ...
2020-11-16 15:07:08 -08:00
Zhang Xiaoxu b5462cc377 drm/i915/selftests: Fix wrong return value of perf_request_latency()
If intel context create failed, the perf_request_latency() will return 0
rather than error, because we doesn't initialize the return value.

Fixes: 25c26f18ea ("drm/i915/selftests: Measure dispatch latency")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zhang Xiaoxu <zhangxiaoxu5@huawei.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20201116143540.3648870-1-zhangxiaoxu5@huawei.com
(cherry picked from commit 1938445205)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
2020-11-16 18:06:28 -05:00