The dma_free_coherent() function needs a valid device pointer or it will
crash.
Fixes: 550c591a89a1 ("dmaengine: sh: Add DMAC driver for RZ/G2L SoC")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Link: https://lore.kernel.org/r/20210827085410.GA9183@kili
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Pointer lmdesc is being inintialized with a value that is never read,
it is later being re-assigned a new value. Fix this by initializing
it with the latter value.
Addresses-Coverity: ("Unused value")
Fixes: 550c591a89a1 ("dmaengine: sh: Add DMAC driver for RZ/G2L SoC")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20210829152811.529766-1-colin.king@canonical.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Building on ARCH=um causes a "redefined" warning, so remove this
PT_OFFSET macro to avoid the warning.
drivers/dma/ptdma/ptdma.h:34: warning: "PT_OFFSET" redefined
34 | #define PT_OFFSET 0x0
|
In file included from ./arch/um/include/asm/thread_info.h:17,
from ./include/linux/thread_info.h:60,
from ./include/asm-generic/preempt.h:5,
from ./arch/um/include/generated/asm/preempt.h:1,
from ./include/linux/preempt.h:78,
from ./include/linux/spinlock.h:55,
from ./include/linux/wait.h:9,
from ./include/linux/wait_bit.h:8,
from ./include/linux/fs.h:6,
from ./include/linux/debugfs.h:15,
from drivers/dma/ptdma/ptdma-debugfs.c:12:
./arch/x86/um/shared/sysdep/ptrace_user.h:4: note: this is the location of the previous definition
4 | #define PT_OFFSET(r) ((r) * sizeof(long))
Reported-by: kernel test robot <lkp@intel.com>
Fixes: 2a99524459ce ("dmaengine: ptdma: Initial driver for the AMD PTDMA")
Signed-off-by: Sanjay R Mehta <sanju.mehta@amd.com>
Link: https://lore.kernel.org/r/1630178908-54973-1-git-send-email-Sanju.Mehta@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Expose data about the configuration and operation of the
PTDMA through debugfs entries: device name, capabilities,
configuration, statistics.
Signed-off-by: Sanjay R Mehta <sanju.mehta@amd.com>
Link: https://lore.kernel.org/r/1629208559-51964-4-git-send-email-Sanju.Mehta@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Add support for AMD PTDMA controller. It performs high-bandwidth
memory to memory and IO copy operation. Device commands are managed
via a circular queue of 'descriptors', each of which specifies source
and destination addresses for copying a single buffer of data.
Signed-off-by: Sanjay R Mehta <sanju.mehta@amd.com>
Link: https://lore.kernel.org/r/1629208559-51964-2-git-send-email-Sanju.Mehta@amd.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
The spinlock is not being used in hard interrupt context. There is no need
to disable irq when acquiring the lock. The interrupt thread handler also
is not in bottom half context, therefore we can also remove disabling of
the bh. Convert all dev_lock acquisition to plain spin_lock() calls.
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/162984026772.1939166.11504067782824765879.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
The cmd_lock spinlock is not being used in hard interrupt context. There is
no need to disable irq when acquiring the lock. Convert all cmd_lock
acquisition to plain spin_lock() calls.
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/162984027930.1939209.15758413737332339204.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
DSA spec says WQ priv bit is 0 if the Privileged Mode Enable field of the
PCI Express PASID capability is 0 and pasid is enabled. Make sure that the
WQCFG priv field is set correctly according to usage type. Reject config if
setting up kernel WQ type and no support. Also add the correct priv setup
for a descriptor.
Fixes: 484f910e93 ("dmaengine: idxd: fix wq config registers offset programming")
Cc: Ramesh Thomas <ramesh.thomas@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/162939084657.903168.14160019185148244596.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
The xilinx dma driver uses the consistent allocations, so for correct
operation also set the DMA mask for coherent APIs. It fixes the below
kernel crash with dmatest client when DMA IP is configured with 64-bit
address width and linux is booted from high (>4GB) memory.
Call trace:
[ 489.531257] dma_alloc_from_pool+0x8c/0x1c0
[ 489.535431] dma_direct_alloc+0x284/0x330
[ 489.539432] dma_alloc_attrs+0x80/0xf0
[ 489.543174] dma_pool_alloc+0x160/0x2c0
[ 489.547003] xilinx_cdma_prep_memcpy+0xa4/0x180
[ 489.551524] dmatest_func+0x3cc/0x114c
[ 489.555266] kthread+0x124/0x130
[ 489.558486] ret_from_fork+0x10/0x3c
[ 489.562051] ---[ end trace 248625b2d596a90a ]---
Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Reviewed-by: Harini Katakam <harini.katakam@xilinx.com>
Link: https://lore.kernel.org/r/1629363528-30347-1-git-send-email-radhey.shyam.pandey@xilinx.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
The CSI2RX subsystem on J721E is serviced by UDMA via PSI-L to transfer
frames to memory. It can have up to 32 threads per instance. J721E has
two instances of the subsystem, so there are 64 threads total. Add them
to the endpoint map.
Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Acked-by: Peter Ujfalusi <peter.ujflausi@gmail.com>
Link: https://lore.kernel.org/r/20210819110106.31409-1-p.yadav@ti.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Add DMA Controller driver for RZ/G2L SoC.
Based on the work done by Chris Brandt for RZ/A DMA driver.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20210806095322.2326-4-biju.das.jz@bp.renesas.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Add DMA_SLAVE_BUSWIDTH_128_BYTES to dma_slave_width for DMA engines
and users to select 128 bytes as bus width.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/r/20210806095322.2326-3-biju.das.jz@bp.renesas.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Now that UML has PCI support, this driver must depend also on
!UML since it pokes at X86_64 architecture internals that don't
exist on ARCH=um.
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Acked-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/20210809112409.a3a0974874d2.I2ffe3d11ed37f735da2f39884a74c953b258b995@changeid
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Since submission is sent to limited portal, the actual wq size for shared
wq is set by the threshold rather than the wq size. When the wq type is
shared, set the allocated descriptors to the threshold.
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/162827151733.3459223.3829837172226042408.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
The submission path for dmaengine API does not do descriptor freeing on
failure. Also, with the abort mechanism, the freeing of descriptor happens
when the abort callback is completed. Therefore free descriptor on all
error paths for submission call to make things consistent. Also remove the
double free that would happen on abort in idxd_dma_tx_submit() call.
Fixes: 6b4b87f2c3 ("dmaengine: idxd: fix submission race window")
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/162827146072.3459011.10255348500504659810.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
- Prevent a memory ordering issue in the timer expiry code which makes it
possible to observe falsely that the callback has been executed already
while that's not the case, which violates the guarantee of del_timer_sync().
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Merge tag 'timers-urgent-2021-08-08' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fix from Thomas Gleixner:
"A single timer fix:
- Prevent a memory ordering issue in the timer expiry code which
makes it possible to observe falsely that the callback has been
executed already while that's not the case, which violates the
guarantee of del_timer_sync()"
* tag 'timers-urgent-2021-08-08' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
timers: Move clearing of base::timer_running under base:: Lock
- Prevent a double enqueue caused by rt_effective_prio() being invoked
twice in __sched_setscheduler().
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Merge tag 'sched-urgent-2021-08-08' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fix from Thomas Gleixner:
"A single scheduler fix:
- Prevent a double enqueue caused by rt_effective_prio() being
invoked twice in __sched_setscheduler()"
* tag 'sched-urgent-2021-08-08' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/rt: Fix double enqueue caused by rt_effective_prio
- Correct the permission checks for perf event which send SIGTRAP to a
different process and clean up that code to be more readable.
- Prevent an out of bound MSR access in the x86 perf code which happened
due to an incomplete limiting to the actually available hardware
counters.
- Prevent access to the AMD64_EVENTSEL_HOSTONLY bit when running inside a
guest.
- Handle small core counter re-enabling correctly by issuing an ACK right
before reenabling it to prevent a stale PEBS record being kept around.
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Merge tag 'perf-urgent-2021-08-08' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Thomas Gleixner:
"A set of perf fixes:
- Correct the permission checks for perf event which send SIGTRAP to
a different process and clean up that code to be more readable.
- Prevent an out of bound MSR access in the x86 perf code which
happened due to an incomplete limiting to the actually available
hardware counters.
- Prevent access to the AMD64_EVENTSEL_HOSTONLY bit when running
inside a guest.
- Handle small core counter re-enabling correctly by issuing an ACK
right before reenabling it to prevent a stale PEBS record being
kept around"
* tag 'perf-urgent-2021-08-08' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/x86/intel: Apply mid ACK for small core
perf/x86/amd: Don't touch the AMD64_EVENTSEL_HOSTONLY bit inside the guest
perf/x86: Fix out of bound MSR access
perf: Refactor permissions check into perf_check_permission()
perf: Fix required permissions if sigtrap is requested
Here are some small char/misc driver fixes for 5.14-rc5.
They resolve a few regressions that people reported:
- acrn driver fix
- fpga driver fix
- interconnect tiny driver fixes
All have been in linux-next for a while with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'char-misc-5.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
Pull char/misc driver fixes from Greg KH:
"Here are some small char/misc driver fixes for 5.14-rc5.
They resolve a few regressions that people reported:
- acrn driver fix
- fpga driver fix
- interconnect tiny driver fixes
All have been in linux-next for a while with no reported issues"
* tag 'char-misc-5.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc:
interconnect: Fix undersized devress_alloc allocation
interconnect: qcom: icc-rpmh: Add BCMs to commit list in pre_aggregate
interconnect: qcom: icc-rpmh: Ensure floor BW is enforced for all nodes
fpga: dfl: fme: Fix cpu hotplug issue in performance reporting
virt: acrn: Do hcall_destroy_vm() before resource release
interconnect: Always call pre_aggregate before aggregate
interconnect: Zero initial BW after sync-state
Here are 3 tiny driver core and firmware loader fixes for 5.14-rc5.
They are:
- driver core fix for when probing fails
- firmware loader fixes for reported problems.
All have been in linux-next for a while with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-5.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core fixes from Greg KH:
"Here are three tiny driver core and firmware loader fixes for
5.14-rc5. They are:
- driver core fix for when probing fails
- firmware loader fixes for reported problems.
All have been in linux-next for a while with no reported issues"
* tag 'driver-core-5.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
firmware_loader: fix use-after-free in firmware_fallback_sysfs
firmware_loader: use -ETIMEDOUT instead of -EAGAIN in fw_load_sysfs_fallback
drivers core: Fix oops when driver probe fails
Here are a few small staging driver fixes for 5.14-rc5 to resolve some
reported problems. They include:
- mt7621 driver fix
- rtl8723bs driver fixes
- rtl8712 driver fixes.
Nothing major, just small problems resolved.
All have been in linux-next for a while with no reported issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-5.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging driver fixes from Greg KH:
"Here are a few small staging driver fixes for 5.14-rc5 to resolve some
reported problems. They include:
- mt7621 driver fix
- rtl8723bs driver fixes
- rtl8712 driver fixes.
Nothing major, just small problems resolved.
All have been in linux-next for a while with no reported issues"
* tag 'staging-5.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
staging: mt7621-pci: avoid to re-disable clock for those pcies not in use
staging: rtl8712: error handling refactoring
staging: rtl8712: get rid of flush_scheduled_work
staging: rtl8723bs: select CONFIG_CRYPTO_LIB_ARC4
staging: rtl8723bs: Fix a resource leak in sd_int_dpc
Here are some small tty/serial driver fixes for 5.14-rc5 to resolve a
number of reported problems.
They include:
- mips serial driver fixes
- 8250 driver fixes for reported problems
- fsl_lpuart driver fixes
- other tiny driver fixes
All have been in linux-next for a while with no reported problems.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-5.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty/serial fixes from Greg KH:
"Here are some small tty/serial driver fixes for 5.14-rc5 to resolve a
number of reported problems.
They include:
- mips serial driver fixes
- 8250 driver fixes for reported problems
- fsl_lpuart driver fixes
- other tiny driver fixes
All have been in linux-next for a while with no reported problems"
* tag 'tty-5.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
serial: 8250_pci: Avoid irq sharing for MSI(-X) interrupts.
serial: 8250_mtk: fix uart corruption issue when rx power off
tty: serial: fsl_lpuart: fix the wrong return value in lpuart32_get_mctrl
serial: 8250_pci: Enumerate Elkhart Lake UARTs via dedicated driver
serial: 8250: fix handle_irq locking
serial: tegra: Only print FIFO error message when an error occurs
MIPS: Malta: Do not byte-swap accesses to the CBUS UART
serial: 8250: Mask out floating 16/32-bit bus bits
serial: max310x: Unprepare and disable clock in error path
Here are some small USB driver fixes for 5.14-rc5. They resolve a
number of small reported issues, including:
- cdnsp driver fixes
- usb serial driver fixes and device id updates
- usb gadget hid fixes
- usb host driver fixes
- usb dwc3 driver fixes
- other usb gadget driver fixes
All of these have been in linux-next for a while with no reported
issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-5.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB driver fixes from Greg KH:
"Here are some small USB driver fixes for 5.14-rc5. They resolve a
number of small reported issues, including:
- cdnsp driver fixes
- usb serial driver fixes and device id updates
- usb gadget hid fixes
- usb host driver fixes
- usb dwc3 driver fixes
- other usb gadget driver fixes
All of these have been in linux-next for a while with no reported
issues"
* tag 'usb-5.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (21 commits)
usb: typec: tcpm: Keep other events when receiving FRS and Sourcing_vbus events
usb: dwc3: gadget: Avoid runtime resume if disabling pullup
usb: dwc3: gadget: Use list_replace_init() before traversing lists
USB: serial: ftdi_sio: add device ID for Auto-M3 OP-COM v2
USB: serial: pl2303: fix GT type detection
USB: serial: option: add Telit FD980 composition 0x1056
USB: serial: pl2303: fix HX type detection
USB: serial: ch341: fix character loss at high transfer rates
usb: cdnsp: Fix the IMAN_IE_SET and IMAN_IE_CLEAR macro
usb: cdnsp: Fixed issue with ZLP
usb: cdnsp: Fix incorrect supported maximum speed
usb: cdns3: Fixed incorrect gadget state
usb: gadget: f_hid: idle uses the highest byte for duration
Revert "thunderbolt: Hide authorized attribute if router does not support PCIe tunnels"
usb: otg-fsm: Fix hrtimer list corruption
usb: host: ohci-at91: suspend/resume ports after/before OHCI accesses
usb: musb: Fix suspend and resume issues for PHYs on I2C and SPI
usb: gadget: f_hid: added GET_IDLE and SET_IDLE handlers
usb: gadget: f_hid: fixed NULL pointer dereference
usb: gadget: remove leaked entry from udc driver list
...
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Merge tag 'io_uring-5.14-2021-08-07' of git://git.kernel.dk/linux-block
Pull io_uring from Jens Axboe:
"A few io-wq related fixes:
- Fix potential nr_worker race and missing max_workers check from one
path (Hao)
- Fix race between worker exiting and new work queue (me)"
* tag 'io_uring-5.14-2021-08-07' of git://git.kernel.dk/linux-block:
io-wq: fix lack of acct->nr_workers < acct->max_workers judgement
io-wq: fix no lock protection of acct->nr_worker
io-wq: fix race between worker exiting and activating free worker
* A fix to avoid dereferencing a null task pointer while walking the
stack.
* A fix to the memory size in the HiFive Unleashed device tree.
* A fix to disable stack protectors when randstruct is enabled, which
results in non-deterministic offsets during module builds.
* A pair of fixes to avoid relying on a constant physical memory base
for the non-XIP builds.
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Merge tag 'riscv-for-linus-5.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
Pull RISC-V fixes from Palmer Dabbelt:
- avoid dereferencing a null task pointer while walking the stack
- fix the memory size in the HiFive Unleashed device tree
- disable stack protectors when randstruct is enabled, which results in
non-deterministic offsets during module builds
- a pair of fixes to avoid relying on a constant physical memory base
for the non-XIP builds
* tag 'riscv-for-linus-5.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
Revert "riscv: Remove CONFIG_PHYS_RAM_BASE_FIXED"
riscv: Get rid of CONFIG_PHYS_RAM_BASE in kernel physical address conversion
riscv: Disable STACKPROTECTOR_PER_TASK if GCC_PLUGIN_RANDSTRUCT is enabled
riscv: dts: fix memory size for the SiFive HiFive Unmatched
riscv: stacktrace: Fix NULL pointer dereference
- Correct the Extended Regular Expressions in tools
- Adjust scripts/checkversion.pl for the current Kbuild
- Unset sub_make_done for 'make install' to make DKMS working again
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Merge tag 'kbuild-fixes-v5.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild fixes from Masahiro Yamada:
- Correct the Extended Regular Expressions in tools
- Adjust scripts/checkversion.pl for the current Kbuild
- Unset sub_make_done for 'make install' to make DKMS work again
* tag 'kbuild-fixes-v5.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
kbuild: cancel sub_make_done for the install target to fix DKMS
scripts: checkversion: modernize linux/version.h search strings
mips: Fix non-POSIX regexp
x86/tools/relocs: Fix non-POSIX regexp
This reverts commit 9b79878ced.
The removal of this config exposes CONFIG_PHYS_RAM_BASE for all kernel
types: this value being implementation-specific, this breaks the
genericity of the RISC-V kernel so revert it.
Signed-off-by: Alexandre Ghiti <alex@ghiti.fr>
Tested-by: Emil Renner Berthing <kernel@esmil.dk>
Reviewed-by: Jisheng Zhang <jszhang@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
The usage of CONFIG_PHYS_RAM_BASE for all kernel types was a mistake:
this value is implementation-specific and this breaks the genericity of
the RISC-V kernel.
Fix this by introducing a new variable phys_ram_base that holds this
value at runtime and use it in the kernel physical address conversion
macro. Since this value is used only for XIP kernels, evaluate it only if
CONFIG_XIP_KERNEL is set which in addition optimizes this macro for
standard kernels at compile-time.
Signed-off-by: Alexandre Ghiti <alex@ghiti.fr>
Tested-by: Emil Renner Berthing <kernel@esmil.dk>
Reviewed-by: Jisheng Zhang <jszhang@kernel.org>
Fixes: 44c9225729 ("RISC-V: enable XIP")
Cc: stable@vger.kernel.org
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
The kyber ioscheduler calls trace_block_rq_insert() *after* the request
is added to the queue but the documentation for trace_block_rq_insert()
says that the call should be made *before* the request is added to the
queue. Move the tracepoint for the kyber ioscheduler so that it is
consistent with the documentation.
Signed-off-by: Vincent Fu <vincent.fu@samsung.com>
Link: https://lore.kernel.org/r/20210804194913.10497-1-vincent.fu@samsung.com
Reviewed by: Adam Manzanares <a.manzanares@samsung.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
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Merge tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Pull ext4 fixes from Ted Ts'o:
"A regression fix, bug fix, and a comment cleanup for ext4"
* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
ext4: fix potential htree corruption when growing large_dir directories
ext4: remove conflicting comment from __ext4_forget
ext4: fix potential uninitialized access to retval in kmmpd
As callbacks to a tracepoint are paired with the data that is passed in when
the callback is registered to the tracepoint, it must have that data passed
to the callback when the tracepoint is triggered, else bad things will
happen. To keep the two together, they are both assigned to a tracepoint
structure and added to an array. The tracepoint call site will dereference
the structure (via RCU) and call the callback in that structure along with
the data in that structure. This keeps the callback and data tightly
coupled.
Because of the overhead that retpolines have on tracepoint callbacks, if
there's only one callback attached to a tracepoint (a common case), then it
is called via a static call (code modified to do a direct call instead of an
indirect call). But to implement this, the data had to be decoupled from the
callback, as now the callback is implemented via a direct call from the
static call and not an indirect call from the dereferenced structure.
Note, the static call only calls a callback used when there's a single
callback attached to the tracepoint. If more than one callback is attached
to the same tracepoint, then the static call will call an iterator
function that goes back to dereferencing the structure keeping the callback
and its data tightly coupled again.
Issues can arise when going from 0 callbacks to one, as the static call is
assigned to the callback, and it must take care that the data passed to it
is loaded before the static call calls the callback. Going from 1 to 2
callbacks is not an issue, as long as the static call is updated to the
iterator before the tracepoint structure array is updated via RCU. Going
from 2 to more or back down to 2 is not an issue as the iterator can handle
all theses cases. But going from 2 to 1, care must be taken as the static
call is now calling a callback and the data that is loaded must be the data
for that callback.
Care was taken to ensure the callback and data would be in-sync, but after
a bug was reported, it became clear that not enough was done to make sure
that was the case. These changes address this.
The first change is to compare the old and new data instead of the old and
new callback, as it's the data that can corrupt the callback, even if the
callback is the same (something getting freed).
The next change is to convert these transitions into states, to make it
easier to know when a synchronization is needed, and to perform those
synchronizations. The problem with this patch is that it slows down
disabling all events from under a second, to making it take over 10 seconds
to do the same work. But that is addressed in the final patch.
The final patch uses the RCU state functions to keep track of the RCU state
between the transitions, and only needs to perform the synchronization if an
RCU synchronization hasn't been done already. This brings the performance of
disabling all events back to its original value. That's because no
synchronization is required between disabling tracepoints but is required
when enabling a tracepoint after its been disabled. If an RCU
synchronization happens after the tracepoint is disabled, and before it is
re-enabled, there's no need to do the synchronization again.
Both the second and third patch have subtle complexities that they are
separated into two patches. But because the second patch causes such a
regression in performance, the third patch adds a "Fixes" tag to the second
patch, such that the two must be backported together and not just the second
patch.
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Merge tag 'trace-v5.14-rc4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing fixes from Steven Rostedt:
"Fix tracepoint race between static_call and callback data
As callbacks to a tracepoint are paired with the data that is passed
in when the callback is registered to the tracepoint, it must have
that data passed to the callback when the tracepoint is triggered,
else bad things will happen. To keep the two together, they are both
assigned to a tracepoint structure and added to an array. The
tracepoint call site will dereference the structure (via RCU) and call
the callback in that structure along with the data in that structure.
This keeps the callback and data tightly coupled.
Because of the overhead that retpolines have on tracepoint callbacks,
if there's only one callback attached to a tracepoint (a common case),
then it is called via a static call (code modified to do a direct call
instead of an indirect call). But to implement this, the data had to
be decoupled from the callback, as now the callback is implemented via
a direct call from the static call and not an indirect call from the
dereferenced structure.
Note, the static call only calls a callback used when there's a single
callback attached to the tracepoint. If more than one callback is
attached to the same tracepoint, then the static call will call an
iterator function that goes back to dereferencing the structure
keeping the callback and its data tightly coupled again.
Issues can arise when going from 0 callbacks to one, as the static
call is assigned to the callback, and it must take care that the data
passed to it is loaded before the static call calls the callback.
Going from 1 to 2 callbacks is not an issue, as long as the static
call is updated to the iterator before the tracepoint structure array
is updated via RCU. Going from 2 to more or back down to 2 is not an
issue as the iterator can handle all theses cases. But going from 2 to
1, care must be taken as the static call is now calling a callback and
the data that is loaded must be the data for that callback.
Care was taken to ensure the callback and data would be in-sync, but
after a bug was reported, it became clear that not enough was done to
make sure that was the case. These changes address this.
The first change is to compare the old and new data instead of the old
and new callback, as it's the data that can corrupt the callback, even
if the callback is the same (something getting freed).
The next change is to convert these transitions into states, to make
it easier to know when a synchronization is needed, and to perform
those synchronizations. The problem with this patch is that it slows
down disabling all events from under a second, to making it take over
10 seconds to do the same work. But that is addressed in the final
patch.
The final patch uses the RCU state functions to keep track of the RCU
state between the transitions, and only needs to perform the
synchronization if an RCU synchronization hasn't been done already.
This brings the performance of disabling all events back to its
original value. That's because no synchronization is required between
disabling tracepoints but is required when enabling a tracepoint after
its been disabled. If an RCU synchronization happens after the
tracepoint is disabled, and before it is re-enabled, there's no need
to do the synchronization again.
Both the second and third patch have subtle complexities that they are
separated into two patches. But because the second patch causes such a
regression in performance, the third patch adds a "Fixes" tag to the
second patch, such that the two must be backported together and not
just the second patch"
* tag 'trace-v5.14-rc4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
tracepoint: Use rcu get state and cond sync for static call updates
tracepoint: Fix static call function vs data state mismatch
tracepoint: static call: Compare data on transition from 2->1 callees
Fix a recent regression in the timer events oriented (TEO) cpuidle
governor causing it to misbehave when idle state 0 is disabled and
rename two local variables for improved clarity on top of that.
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Merge tag 'pm-5.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull power management fixes from Rafael Wysocki:
"Fix a recent regression in the timer events oriented (TEO) cpuidle
governor causing it to misbehave when idle state 0 is disabled and
rename two local variables for improved clarity on top of that"
* tag 'pm-5.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
cpuidle: teo: Rename two local variables in teo_select()
cpuidle: teo: Fix alternative idle state lookup
Revert a recent ACPICA commit causing boot issues to appear on some
systems.
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Merge tag 'acpi-5.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI fix from Rafael Wysocki:
"Revert a recent ACPICA commit causing boot issues to appear on some
systems"
* tag 'acpi-5.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
Revert "ACPICA: Fix memory leak caused by _CID repair function"
Lots of small fixes for Arm SoCs this time, nothing
too worrying:
- omap/beaglebone boot regression fix in gpt12 timer
- revert for i.mx8 soc driver breaking as a platform_driver
- kexec/kdump fixes for op-tee
- various fixes for incorrect DT settings on imx, mvebu, omap,
stm32, and tegra causing problems.
- device tree fixes for static checks in nomadik, versatile, stm32
- code fixes for issues found in build testing and with static
checking on tegra, ixp4xx, imx, omap
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Merge tag 'soc-fixes-5.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Pull ARM SoC fixes from Arnd Bergmann:
"Lots of small fixes for Arm SoCs this time, nothing too worrying:
- omap/beaglebone boot regression fix in gpt12 timer
- revert for i.mx8 soc driver breaking as a platform_driver
- kexec/kdump fixes for op-tee
- various fixes for incorrect DT settings on imx, mvebu, omap, stm32,
and tegra causing problems.
- device tree fixes for static checks in nomadik, versatile, stm32
- code fixes for issues found in build testing and with static
checking on tegra, ixp4xx, imx, omap"
* tag 'soc-fixes-5.14-2' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (36 commits)
soc: ixp4xx/qmgr: fix invalid __iomem access
soc: ixp4xx: fix printing resources
ARM: ixp4xx: goramo_mlr depends on old PCI driver
ARM: ixp4xx: fix compile-testing soc drivers
soc/tegra: Make regulator couplers depend on CONFIG_REGULATOR
ARM: dts: nomadik: Fix up interrupt controller node names
ARM: dts: stm32: Fix touchscreen IRQ line assignment on DHCOM
ARM: dts: stm32: Disable LAN8710 EDPD on DHCOM
ARM: dts: stm32: Prefer HW RTC on DHCOM SoM
omap5-board-common: remove not physically existing vdds_1v8_main fixed-regulator
ARM: dts: am437x-l4: fix typo in can@0 node
ARM: dts: am43x-epos-evm: Reduce i2c0 bus speed for tps65218
bus: ti-sysc: AM3: RNG is GP only
ARM: omap2+: hwmod: fix potential NULL pointer access
arm64: dts: armada-3720-turris-mox: remove mrvl,i2c-fast-mode
arm64: dts: armada-3720-turris-mox: fixed indices for the SDHC controllers
ARM: dts: imx: Swap M53Menlo pinctrl_power_button/pinctrl_power_out pins
ARM: imx: fix missing 3rd argument in macro imx_mmdc_perf_init
ARM: dts: colibri-imx6ull: limit SDIO clock to 25MHz
arm64: dts: ls1028: sl28: fix networking for variant 2
...
- Fix extension/truncation of return values from 32-bit system calls
- Fix interaction between unwinding and tracing
- Fix spurious toolchain warning emitted during make
- Fix Kconfig help text for RANDOMIZE_MODULE_REGION_FULL
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Will Deacon:
"It's all pretty minor but the main fix is sorting out how we deal with
return values from 32-bit system calls as audit expects error codes to
be sign-extended to 64 bits
Summary:
- Fix extension/truncation of return values from 32-bit system calls
- Fix interaction between unwinding and tracing
- Fix spurious toolchain warning emitted during make
- Fix Kconfig help text for RANDOMIZE_MODULE_REGION_FULL"
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: stacktrace: avoid tracing arch_stack_walk()
arm64: stacktrace: fix comment
arm64: fix the doc of RANDOMIZE_MODULE_REGION_FULL
arm64: move warning about toolchains to archprepare
arm64: fix compat syscall return truncation
A small collection of fixes for SPI, small mostly driver specific things
plus a fix for module autoloading which hadn't been working properly for
DT systems.
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Merge tag 'spi-fix-v5.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Pull spi fixes from Mark Brown:
"A small collection of fixes for SPI, small mostly driver specific
things plus a fix for module autoloading which hadn't been working
properly for DT systems"
* tag 'spi-fix-v5.14-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
spi: cadence-quadspi: Fix check condition for DTR ops
spi: mediatek: Fix fifo transfer
spi: imx: mx51-ecspi: Fix CONFIGREG delay comment
spi: imx: mx51-ecspi: Fix low-speed CONFIGREG delay calculation
spi: update modalias_show after of_device_uevent_modalias support
spi: meson-spicc: fix memory leak in meson_spicc_remove
spi: spi-mux: Add module info needed for autoloading
Bunch of driver fixes, notably:
- idxd driver fixes for submission race, driver remove sequence, setup
sequence for MSIXPERM, array index and updating descriptor vector
- usb-dmac, pm reference leak fix
- xilinx_dma, read-after-free fix
- uniphier-xdmac fix for using atomic readl_poll_timeout_atomic()
- of-dma, router_xlate to return
- imx-dma, generic dma fix
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Merge tag 'dmaengine-fix-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine
Pull dmaengine fixes from Vinod Koul:
"A bunch of driver fixes, notably:
- idxd driver fixes for submission race, driver remove sequence,
setup sequence for MSIXPERM, array index and updating descriptor
vector
- usb-dmac, pm reference leak fix
- xilinx_dma, read-after-free fix
- uniphier-xdmac fix for using atomic readl_poll_timeout_atomic()
- of-dma, router_xlate to return
- imx-dma, generic dma fix"
* tag 'dmaengine-fix-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/dmaengine:
dmaengine: imx-dma: configure the generic DMA type to make it work
dmaengine: of-dma: router_xlate to return -EPROBE_DEFER if controller is not yet available
dmaengine: stm32-dmamux: Fix PM usage counter unbalance in stm32 dmamux ops
dmaengine: stm32-dma: Fix PM usage counter imbalance in stm32 dma ops
dmaengine: uniphier-xdmac: Use readl_poll_timeout_atomic() in atomic state
dmaengine: idxd: fix submission race window
dmaengine: idxd: fix sequence for pci driver remove() and shutdown()
dmaengine: idxd: fix desc->vector that isn't being updated
dmaengine: idxd: fix setup sequence for MSIXPERM table
dmaengine: idxd: fix array index when int_handles are being used
dmaengine: usb-dmac: Fix PM reference leak in usb_dmac_probe()
dmaengine: xilinx_dma: Fix read-after-free bug when terminating transfers
Several small recent regressions:
- Typo causing incorrect operation of the mlx5 mkey cache expiration
- Revert a CM patch that is breaking some ULPs
- Typo breaking SRQ in rxe
- Revert a rxe patch breaking icrc calculation
- Static checker warning about unbalance locking in hns
- Subtle cxgb4 regression from a recent atomic to refcount conversion
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma
Pull rdma fixes from Jason Gunthorpe:
"Several small recent regressions - rather more than usual, but nothing
too scary. Good to know people are testing.
- Typo causing incorrect operation of the mlx5 mkey cache
expiration
- Revert a CM patch that is breaking some ULPs
- Typo breaking SRQ in rxe
- Revert a rxe patch breaking icrc calculation
- Static checker warning about unbalanced locking in hns
- Subtle cxgb4 regression from a recent atomic to refcount
conversion"
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
RDMA/iw_cxgb4: Fix refcount underflow while destroying cqs.
RDMA/hns: Fix the double unlock problem of poll_sem
RDMA/rxe: Restore setting tot_len in the IPv4 header
RDMA/rxe: Use the correct size of wqe when processing SRQ
RDMA/cma: Revert INIT-INIT patch
RDMA/mlx5: Delay emptying a cache entry when a new MR is added to it recently
Here is a collection of small fixes:
- A few regression fixes (PCM core fixes, USB-audio fixes)
- Follow up fixes for the USB-audio mixer changes in this cycle
- A long-standing ALSA sequencer race bug fix
- Usual device-specific quirks for HD- and USB-audio
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Merge tag 'sound-5.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"A collection of small fixes:
- A few regression fixes (PCM core fixes, USB-audio fixes)
- Follow up fixes for the USB-audio mixer changes in this cycle
- A long-standing ALSA sequencer race bug fix
- Usual device-specific quirks for HD- and USB-audio"
* tag 'sound-5.14-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: seq: Fix racy deletion of subscriber
ALSA: memalloc: Fix regression with SNDRV_DMA_TYPE_CONTINUOUS
ALSA: pcm - fix mmap capability check for the snd-dummy driver
ALSA: usb-audio: Avoid unnecessary or invalid connector selection at resume
ALSA: hda/realtek: add mic quirk for Acer SF314-42
ALSA: usb-audio: Add registration quirk for JBL Quantum 600
ALSA: hda/realtek: Fix headset mic for Acer SWIFT SF314-56 (ALC256)
ALSA: usb-audio: Fix superfluous autosuspend recovery
ALSA: usb-audio: fix incorrect clock source setting
ALSA: scarlett2: Fix line out/speaker switching notifications
ALSA: scarlett2: Correct channel mute status after mute button pressed
ALSA: scarlett2: Fix Direct Monitor control name for 2i2
ALSA: scarlett2: Fix Mute/Dim/MSD Mode control names
amdgpu:
- Fix potential out-of-bounds read when updating GPUVM mapping
- Renoir powergating fix
- Yellow Carp updates
- 8K fix for navi1x
- Beige Goby updates and new DIDs
- Fix DMUB firmware version output
- EDP fix
- pmops config fix
i915:
- Call i915_globals_exit if pci_register_device fails
- (follow on fix for section mismatch)
- Correct SFC_DONE register offset
kmb:
- DMA fix
- driver date/version macros
vmwgfx:
- Fix I/O memory access on 64-bit systems
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Merge tag 'drm-fixes-2021-08-06' of git://anongit.freedesktop.org/drm/drm
Pull drm fixes from Dave Airlie:
"Regular weekly fixes pull, live from a Brisbane lockdown with kids at
home.
A big bunch of scattered amdgpu fixes, but they are all pretty small,
minor i915 fixes, kmb, and one vmwgfx regression fixes, all pretty
quiet for this time.
amdgpu:
- Fix potential out-of-bounds read when updating GPUVM mapping
- Renoir powergating fix
- Yellow Carp updates
- 8K fix for navi1x
- Beige Goby updates and new DIDs
- Fix DMUB firmware version output
- EDP fix
- pmops config fix
i915:
- Call i915_globals_exit if pci_register_device fails
- (follow on fix for section mismatch)
- Correct SFC_DONE register offset
kmb:
- DMA fix
- driver date/version macros
vmwgfx:
- Fix I/O memory access on 64-bit systems"
* tag 'drm-fixes-2021-08-06' of git://anongit.freedesktop.org/drm/drm:
drm/amdgpu: add DID for beige goby
drm/amdgpu/display: fix DMUB firmware version info
drm/amd/display: workaround for hard hang on HPD on native DP
drm/amd/display: Fix resetting DCN3.1 HW when resuming from S4
drm/amd/display: Increase stutter watermark for dcn303
drm/amd/display: Fix Dynamic bpp issue with 8K30 with Navi 1X
drm/amd/display: Assume LTTPR interop for DCN31+
drm/amdgpu: fix checking pmops when PM_SLEEP is not enabled
drm/amd/pm: update yellow carp pmfw interface version
drm/i915: fix i915_globals_exit() section mismatch error
drm/i915: Call i915_globals_exit() if pci_register_device() fails
drm/i915: Correct SFC_DONE register offset
drm/vmwgfx: Fix a 64bit regression on svga3
drm/amdgpu: fix the doorbell missing when in CGPG issue for renoir.
drm/amdgpu: Fix out-of-bounds read when update mapping
drm/kmb: Define driver date and major/minor version
drm/kmb: Enable LCD DMA for low TVDDCV
Commit b5776e7524 ("ext4: fix potential htree index checksum
corruption) removed a required restart when multiple levels of index
nodes need to be split. Fix this to avoid directory htree corruptions
when using the large_dir feature.
Cc: stable@kernel.org # v5.11
Cc: Благодаренко Артём <artem.blagodarenko@gmail.com>
Fixes: b5776e7524 ("ext4: fix potential htree index checksum corruption)
Reported-by: Denis <denis@voxelsoft.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
The list lock is never acquired in interrupt context. Therefore there is no
need to disable interrupts. Remove interrupt flags for lock operations.
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/162826417450.3454650.3733188117742416238.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
