It shouldn't happen, but can happen that readable eeprom size is smaller
than announced. Then we would be stuck in an endless loop here because
after reaching the actual end reads return eeprom.len = 0. I faced this
issue when making a mistake in driver development. Detect this scenario
and return an error.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Removed "stdbool.h" inclusion in iosm_ipc_imem.h
Fixes: 13bb8429ca ("net: wwan: iosm: firmware flashing and coredump collection")
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: M Chetan Kumar <m.chetan.kumar@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Also correct how initialize_dco_operating_mode is called
Signed-off-by: Min Li <min.li.xe@renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
So far we don't need to support new 5.2 functions but different register
addresses
Signed-off-by: Min Li <min.li.xe@renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Not need since TCS firmware file will configure it properlly.
Signed-off-by: Min Li <min.li.xe@renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch is a follow-up to beb401ec50 ("r8169: deprecate support for
RTL_GIGA_MAC_VER_27") that came with 5.12. Nobody complained, so let's
remove support for this chip version.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Guvenc Gulce says:
====================
net/smc: add EID support
please apply the following patch series for smc to netdev's net-next
tree. The series introduce the so called Enterprise ID support for smc
protocol. Including the generic netlink based interface.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
With SMC-Dv2 users can configure if the static system EID should be used
during CLC handshake, or if only user EIDs are allowed.
Add generic netlink support to enable and disable the system EID, and
to retrieve the system EID and its current enabled state.
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Reviewed-by: Guvenc Gulce <guvenc@linux.ibm.com>
Signed-off-by: Guvenc Gulce <guvenc@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The system EID is retrieved using an registered ISM device each time
when needed. This adds some unnecessary complexity at all places where
the system EID is needed, but no ISM device is at hand.
Simplify the code and save the system EID in a static variable in
smc_ism.c.
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Reviewed-by: Guvenc Gulce <guvenc@linux.ibm.com>
Signed-off-by: Guvenc Gulce <guvenc@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
SMC-Dv2 allows users to define EIDs which allows to create separate
name spaces enabling users to cluster their SMC-Dv2 connections.
Add support for user defined EIDs and extent the generic netlink
interface so users can add, remove and dump EIDs.
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Reviewed-by: Guvenc Gulce <guvenc@linux.ibm.com>
Signed-off-by: Guvenc Gulce <guvenc@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Karsten Graul says:
====================
s390/net: updates 2021-09-14
Please apply the following patches to netdev's net-next tree.
Stop using the wrappers in include/linux/pci-dma-compat.h,
and fix warnings about incorrect kernel-doc comments.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
The wrappers in include/linux/pci-dma-compat.h should go away.
The patch has been generated with the coccinelle script below.
@@
expression e1, e2;
@@
- pci_set_dma_mask(e1, e2)
+ dma_set_mask(&e1->dev, e2)
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Many comments above functions start with a kernel doc indicator, but
the comments are not using kernel doc style. Get rid of the warnings
by simply removing the indicator.
E.g.:
drivers/s390/net/netiucv.c:1852: warning:
This comment starts with '/**', but isn't a kernel-doc comment.
Reviewed-by: Alexandra Winter <wintera@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Many comments above functions start with a kernel doc indicator, but
the comments are not using kernel doc style. Get rid of the warnings
by simply removing the indicator.
E.g.:
drivers/s390/net/lcs.c:2355: warning:
This comment starts with '/**', but isn't a kernel-doc comment.
Acked-by: Alexandra Winter <wintera@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Many comments above functions start with a kernel doc indicator, but
the comments are not using kernel doc style. Get rid of the warnings
by simply removing the indicator.
E.g.:
drivers/s390/net/ctcm_main.c:979: warning:
This comment starts with '/**', but isn't a kernel-doc comment.
Acked-by: Alexandra Winter <wintera@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Karsten Graul <kgraul@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Ido Schimmel says:
====================
mlxsw: spectrum: Adjustments to port split and label port
Jiri says:
This patchset includes patches that prepare the driver to support modular
systems.
PLLP register is introduced to get front panel port label which is no
longer equivalent to "module + 1" for modular systems, where the
numbering is per line card.
So far for all systems all front panel ports had same format and could
be split to the same number of subports. This is no longer true for
modular systems, where every line card can have different types of front
panel ports.
The PMTDB register is introduced to easily query FW for split
capabilities of particular front panel port. It is generic for use in
modular and non-modular systems.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
It is not used anymore, remove it.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Newly introduced PMTDB register is there to provide all needed info
about particular requested port split configuration. Use it instead of
figuring the info out manually in the driver.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The PMTDB register allows to query the possible module<->local port
mapping than can be used in PMLP. It does not represent the actual/current
mapping of the local to module. Actual mapping is only defined by PMLP.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Instead of relying on the values coming from the PMLP register, use PLLP
to get the information about port front panel number and split number.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The PLLP register returns the mapping from Local Port into Label Port.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
During port creation, mlxsw_core_port_init() is called with the front
panel port number and the split port sub-number. Currently, this
information is determined by the driver without firmware assistance.
Subsequent patches are going to query this information from firmware,
but this requires the port to assigned to SWID.
Therefore, move port SWID assignment before mlxsw_core_port_init().
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
During port creation, mlxsw_core_port_init() is called with the front
panel port number and the split port sub-number. Currently, this
information is determined by the driver without firmware assistance.
Subsequent patches are going to query this information from firmware,
but this requires the port to be mapped to a module.
Therefore, move port mapping before mlxsw_core_port_init().
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add latest verified version of Nvidia Spectrum-family switch firmware,
for Spectrum (13.2008.3326), Spectrum-2 (29.2008.3326) and Spectrum-3
(30.2008.3326).
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch brings-in support for M.2 7560 Device firmware flashing &
coredump collection using devlink.
- Driver Registers with Devlink framework.
- Register devlink params callback for configuring device params
required in flashing or coredump flow.
- Implements devlink ops flash_update callback that programs modem
firmware.
- Creates region & snapshot required for device coredump log collection.
On early detection of device in boot rom stage. Driver registers with
Devlink framework and establish transport channel for PSI (Primary Signed
Image) injection. Once PSI is injected to device, the device execution
stage details are read to determine whether device is in flash or
exception mode. The collected information is reported to devlink user
space application & based on this informationi, application proceeds with
either modem firmware flashing or coredump collection.
Signed-off-by: M Chetan Kumar <m.chetan.kumar@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Krzysztof Kozlowski says:
====================
nfc: minor printk cleanup
Changes since v1:
1. Remove unused variable in pn533 (reported by kbuild).
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
nci_skb_alloc() already prints an error message on memory allocation
failure.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
nfc_mei_phy_alloc() already prints an error message on memory allocation
failure.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
nfc_mei_phy_alloc() already prints an error message on memory allocation
failure.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
ftrace is a preferred and standard way to debug entering and exiting
functions so drop useless debug prints.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Print error message with reference to a device.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
ftrace is a preferred and standard way to debug entering and exiting
functions so drop useless debug prints.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
ftrace is a preferred and standard way to debug entering and exiting
functions so drop useless debug prints.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Remove unneeded line break between pr_debug and arguments.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
As noted in the "Deprecated Interfaces, Language Features, Attributes,
and Conventions" documentation [1], size calculations (especially
multiplication) should not be performed in memory allocator (or similar)
function arguments due to the risk of them overflowing. This could lead
to values wrapping around and a smaller allocation being made than the
caller was expecting. Using those allocations could lead to linear
overflows of heap memory and other misbehaviors.
So, use the struct_size() helper to do the arithmetic instead of the
argument "size + count * size" in the kzalloc() function.
[1] https://www.kernel.org/doc/html/v5.14/process/deprecated.html#open-coded-arithmetic-in-allocator-arguments
Signed-off-by: Len Baker <len.baker@gmx.com>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
As it was reported and discussed in: https://lore.kernel.org/lkml/CAHk-=whF9F89vsfH8E9TGc0tZA-yhzi2Di8wOtquNB5vRkFX5w@mail.gmail.com/
This patch improves the stack space of qede_config_rx_mode() by
splitting filter_config() to 3 functions and removing the
union qed_filter_type_params.
Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Signed-off-by: Ariel Elior <aelior@marvell.com>
Signed-off-by: Shai Malin <smalin@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
wireless and can.
Current release - regressions:
- qrtr: revert check in qrtr_endpoint_post(), fixes audio and wifi
- ip_gre: validate csum_start only on pull
- bnxt_en: fix 64-bit doorbell operation on 32-bit kernels
- ionic: fix double use of queue-lock, fix a sleeping in atomic
- can: c_can: fix null-ptr-deref on ioctl()
- cs89x0: disable compile testing on powerpc
Current release - new code bugs:
- bridge: mcast: fix vlan port router deadlock, consistently disable BH
Previous releases - regressions:
- dsa: tag_rtl4_a: fix egress tags, only port 0 was working
- mptcp: fix possible divide by zero
- netfilter: nft_ct: protect nft_ct_pcpu_template_refcnt with mutex
- netfilter: socket: icmp6: fix use-after-scope
- stmmac: fix MAC not working when system resume back with WoL active
Previous releases - always broken:
- ip/ip6_gre: use the same logic as SIT interfaces when computing v6LL
address
- seg6: set fc_nlinfo in nh_create_ipv4, nh_create_ipv6
- mptcp: only send extra TCP acks in eligible socket states
- dsa: lantiq_gswip: fix maximum frame length
- stmmac: fix overall budget calculation for rxtx_napi
- bnxt_en: fix firmware version reporting via devlink
- renesas: sh_eth: add missing barrier to fix freeing wrong tx descriptor
Stragglers:
- netfilter: conntrack: switch to siphash
- netfilter: refuse insertion if chain has grown too large
- ncsi: add get MAC address command to get Intel i210 MAC address
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
-----BEGIN PGP SIGNATURE-----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=Zvuz
-----END PGP SIGNATURE-----
Merge tag 'net-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Pull networking fixes and stragglers from Jakub Kicinski:
"Networking stragglers and fixes, including changes from netfilter,
wireless and can.
Current release - regressions:
- qrtr: revert check in qrtr_endpoint_post(), fixes audio and wifi
- ip_gre: validate csum_start only on pull
- bnxt_en: fix 64-bit doorbell operation on 32-bit kernels
- ionic: fix double use of queue-lock, fix a sleeping in atomic
- can: c_can: fix null-ptr-deref on ioctl()
- cs89x0: disable compile testing on powerpc
Current release - new code bugs:
- bridge: mcast: fix vlan port router deadlock, consistently disable
BH
Previous releases - regressions:
- dsa: tag_rtl4_a: fix egress tags, only port 0 was working
- mptcp: fix possible divide by zero
- netfilter: nft_ct: protect nft_ct_pcpu_template_refcnt with mutex
- netfilter: socket: icmp6: fix use-after-scope
- stmmac: fix MAC not working when system resume back with WoL active
Previous releases - always broken:
- ip/ip6_gre: use the same logic as SIT interfaces when computing
v6LL address
- seg6: set fc_nlinfo in nh_create_ipv4, nh_create_ipv6
- mptcp: only send extra TCP acks in eligible socket states
- dsa: lantiq_gswip: fix maximum frame length
- stmmac: fix overall budget calculation for rxtx_napi
- bnxt_en: fix firmware version reporting via devlink
- renesas: sh_eth: add missing barrier to fix freeing wrong tx
descriptor
Stragglers:
- netfilter: conntrack: switch to siphash
- netfilter: refuse insertion if chain has grown too large
- ncsi: add get MAC address command to get Intel i210 MAC address"
* tag 'net-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (76 commits)
ieee802154: Remove redundant initialization of variable ret
net: stmmac: fix MAC not working when system resume back with WoL active
net: phylink: add suspend/resume support
net: renesas: sh_eth: Fix freeing wrong tx descriptor
bonding: 3ad: pass parameter bond_params by reference
cxgb3: fix oops on module removal
can: c_can: fix null-ptr-deref on ioctl()
can: rcar_canfd: add __maybe_unused annotation to silence warning
net: wwan: iosm: Unify IO accessors used in the driver
net: wwan: iosm: Replace io.*64_lo_hi() with regular accessors
net: qcom/emac: Replace strlcpy with strscpy
ip6_gre: Revert "ip6_gre: add validation for csum_start"
net: hns3: make hclgevf_cmd_caps_bit_map0 and hclge_cmd_caps_bit_map0 static
selftests/bpf: Test XDP bonding nest and unwind
bonding: Fix negative jump label count on nested bonding
MAINTAINERS: add VM SOCKETS (AF_VSOCK) entry
stmmac: dwmac-loongson:Fix missing return value
iwlwifi: fix printk format warnings in uefi.c
net: create netdev->dev_addr assignment helpers
bnxt_en: Fix possible unintended driver initiated error recovery
...
- Page ownership tracking between host EL1 and EL2
- Rely on userspace page tables to create large stage-2 mappings
- Fix incompatibility between pKVM and kmemleak
- Fix the PMU reset state, and improve the performance of the virtual PMU
- Move over to the generic KVM entry code
- Address PSCI reset issues w.r.t. save/restore
- Preliminary rework for the upcoming pKVM fixed feature
- A bunch of MM cleanups
- a vGIC fix for timer spurious interrupts
- Various cleanups
s390:
- enable interpretation of specification exceptions
- fix a vcpu_idx vs vcpu_id mixup
x86:
- fast (lockless) page fault support for the new MMU
- new MMU now the default
- increased maximum allowed VCPU count
- allow inhibit IRQs on KVM_RUN while debugging guests
- let Hyper-V-enabled guests run with virtualized LAPIC as long as they
do not enable the Hyper-V "AutoEOI" feature
- fixes and optimizations for the toggling of AMD AVIC (virtualized LAPIC)
- tuning for the case when two-dimensional paging (EPT/NPT) is disabled
- bugfixes and cleanups, especially with respect to 1) vCPU reset and
2) choosing a paging mode based on CR0/CR4/EFER
- support for 5-level page table on AMD processors
Generic:
- MMU notifier invalidation callbacks do not take mmu_lock unless necessary
- improved caching of LRU kvm_memory_slot
- support for histogram statistics
- add statistics for halt polling and remote TLB flush requests
-----BEGIN PGP SIGNATURE-----
iQFIBAABCAAyFiEE8TM4V0tmI4mGbHaCv/vSX3jHroMFAmE2CIAUHHBib256aW5p
QHJlZGhhdC5jb20ACgkQv/vSX3jHroMyqwf+Ky2WoThuQ9Ra0r/m8pUTAx5+gsAf
MmG24rNLE+26X0xuBT9Q5+etYYRLrRTWJvo5cgHooz7muAYW6scR+ho5xzvLTAxi
DAuoijkXsSdGoFCp0OMUHiwG3cgY5N7feTEwLPAb2i6xr/l6SZyCP4zcwiiQbJ2s
UUD0i3rEoNQ02/hOEveud/ENxzUli9cmmgHKXR3kNgsJClSf1fcuLnhg+7EGMhK9
+c2V+hde5y0gmEairQWm22MLMRolNZ5NL4kjykiNh2M5q9YvbHe5+f/JmENlNZMT
bsUQT6Ry1ukuJ0V59rZvUw71KknPFzZ3d6HgW4pwytMq6EJKiISHzRbVnQ==
=FCAB
-----END PGP SIGNATURE-----
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM updates from Paolo Bonzini:
"ARM:
- Page ownership tracking between host EL1 and EL2
- Rely on userspace page tables to create large stage-2 mappings
- Fix incompatibility between pKVM and kmemleak
- Fix the PMU reset state, and improve the performance of the virtual
PMU
- Move over to the generic KVM entry code
- Address PSCI reset issues w.r.t. save/restore
- Preliminary rework for the upcoming pKVM fixed feature
- A bunch of MM cleanups
- a vGIC fix for timer spurious interrupts
- Various cleanups
s390:
- enable interpretation of specification exceptions
- fix a vcpu_idx vs vcpu_id mixup
x86:
- fast (lockless) page fault support for the new MMU
- new MMU now the default
- increased maximum allowed VCPU count
- allow inhibit IRQs on KVM_RUN while debugging guests
- let Hyper-V-enabled guests run with virtualized LAPIC as long as
they do not enable the Hyper-V "AutoEOI" feature
- fixes and optimizations for the toggling of AMD AVIC (virtualized
LAPIC)
- tuning for the case when two-dimensional paging (EPT/NPT) is
disabled
- bugfixes and cleanups, especially with respect to vCPU reset and
choosing a paging mode based on CR0/CR4/EFER
- support for 5-level page table on AMD processors
Generic:
- MMU notifier invalidation callbacks do not take mmu_lock unless
necessary
- improved caching of LRU kvm_memory_slot
- support for histogram statistics
- add statistics for halt polling and remote TLB flush requests"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (210 commits)
KVM: Drop unused kvm_dirty_gfn_invalid()
KVM: x86: Update vCPU's hv_clock before back to guest when tsc_offset is adjusted
KVM: MMU: mark role_regs and role accessors as maybe unused
KVM: MIPS: Remove a "set but not used" variable
x86/kvm: Don't enable IRQ when IRQ enabled in kvm_wait
KVM: stats: Add VM stat for remote tlb flush requests
KVM: Remove unnecessary export of kvm_{inc,dec}_notifier_count()
KVM: x86/mmu: Move lpage_disallowed_link further "down" in kvm_mmu_page
KVM: x86/mmu: Relocate kvm_mmu_page.tdp_mmu_page for better cache locality
Revert "KVM: x86: mmu: Add guest physical address check in translate_gpa()"
KVM: x86/mmu: Remove unused field mmio_cached in struct kvm_mmu_page
kvm: x86: Increase KVM_SOFT_MAX_VCPUS to 710
kvm: x86: Increase MAX_VCPUS to 1024
kvm: x86: Set KVM_MAX_VCPU_ID to 4*KVM_MAX_VCPUS
KVM: VMX: avoid running vmx_handle_exit_irqoff in case of emulation
KVM: x86/mmu: Don't freak out if pml5_root is NULL on 4-level host
KVM: s390: index kvm->arch.idle_mask by vcpu_idx
KVM: s390: Enable specification exception interpretation
KVM: arm64: Trim guest debug exception handling
KVM: SVM: Add 5-level page table support for SVM
...
Pull dmi fix from Jean Delvare.
Unbreak some existing udev/hwdb modalias matches due to misplaced
product_sku field.
* 'dmi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
firmware: dmi: Move product_sku info to the end of the modalias
-----BEGIN PGP SIGNATURE-----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=1kqW
-----END PGP SIGNATURE-----
Merge tag 'ntb-5.15' of git://github.com/jonmason/ntb
Pull NTB updates from Jon Mason:
"Bug fixes and clean-ups for Linux v5.15"
* tag 'ntb-5.15' of git://github.com/jonmason/ntb:
NTB: switch from 'pci_' to 'dma_' API
ntb: ntb_pingpong: remove redundant initialization of variables msg_data and spad_data
NTB: perf: Fix an error code in perf_setup_inbuf()
NTB: Fix an error code in ntb_msit_probe()
ntb: intel: remove invalid email address in header comment
This moves the crash recovery worker to the freezable work queue to
avoid interaction with other drivers during suspend & resume. It fixes a
couple of typos in comments.
It adds support for handling the audio DSP on SDM660 and it fixes a race
between the Qualcomm wireless subsystem driver and the associated driver
for the RF chip.
-----BEGIN PGP SIGNATURE-----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=EX0n
-----END PGP SIGNATURE-----
Merge tag 'rproc-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/andersson/remoteproc
Pull remoteproc updates from Bjorn Andersson:
- move the crash recovery worker to the freezable work queue to avoid
interaction with other drivers during suspend & resume
- fix a couple of typos in comments
- add support for handling the audio DSP on SDM660
- fix a race between the Qualcomm wireless subsystem driver and the
associated driver for the RF chip
* tag 'rproc-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/andersson/remoteproc:
remoteproc: q6v5_pas: Add sdm660 ADSP PIL compatible
dt-bindings: remoteproc: qcom: adsp: Add SDM660 ADSP
remoteproc: use freezable workqueue for crash notifications
remoteproc: fix kernel doc for struct rproc_ops
remoteproc: fix an typo in fw_elf_get_class code comments
remoteproc: qcom: wcnss: Fix race with iris probe
- Add support for registering devices via MFD cells to Simple MFD (I2C)
- New Drivers
- Add support for Renesas Synchronization Management Unit (SMU)
- New Device Support
- Add support for N5010 to Intel M10 BMC
- Add support for Cannon Lake to Intel LPSS ACPI
- Add support for Samsung SSG{1,2} to ST-Ericsson's U8500 family
- Add support for TQMx110EB and TQMxE40x to TQ-Systems PLD TQMx86
- New Functionality
- Add support for GPIO to Intel LPC ICH
- Add support for Reset to Texas Instruments TPS65086
- Fix-ups
- Trivial, sorting, whitespace, renaming, etc; mt6360-core, db8500-prcmu-regs, tqmx86
- Device Tree fiddling; syscon, axp20x, qcom,pm8008, ti,tps65086, brcm,cru
- Use proper APIs for IRQ map resolution; ab8500-core, stmpe, tc3589x, wm8994-irq
- Pass 'supplied-from' property through axp288_fuel_gauge via swnode
- Remove unused file entry; MAINTAINERS
- Make interrupt line optional; tps65086
- Rename db8500-cpuidle driver symbol; db8500-prcmu
- Remove support for unused hardware; tqmx86
- Provide a standard LPC clock frequency for unknown boards; tqmx86
- Remove unused code; ti_am335x_tscadc
- Use of_iomap() instead of ioremap(); syscon
- Bug Fixes
- Clear GPIO IRQ resource flags when no IRQ is set; tqmx86
- Fix incorrect/misleading frequencies; db8500-prcmu
- Mitigate namespace clash with other GPIOBASE users
-----BEGIN PGP SIGNATURE-----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=7Zv8
-----END PGP SIGNATURE-----
Merge tag 'mfd-next-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd
Pull MFD updates from Lee Jones:
"Core Frameworks:
- Add support for registering devices via MFD cells to Simple MFD (I2C)
New Drivers:
- Add support for Renesas Synchronization Management Unit (SMU)
New Device Support:
- Add support for N5010 to Intel M10 BMC
- Add support for Cannon Lake to Intel LPSS ACPI
- Add support for Samsung SSG{1,2} to ST-Ericsson's U8500 family
- Add support for TQMx110EB and TQMxE40x to TQ-Systems PLD TQMx86
New Functionality:
- Add support for GPIO to Intel LPC ICH
- Add support for Reset to Texas Instruments TPS65086
Fix-ups:
- Trivial, sorting, whitespace, renaming, etc; mt6360-core, db8500-prcmu-regs, tqmx86
- Device Tree fiddling; syscon, axp20x, qcom,pm8008, ti,tps65086, brcm,cru
- Use proper APIs for IRQ map resolution; ab8500-core, stmpe, tc3589x, wm8994-irq
- Pass 'supplied-from' property through axp288_fuel_gauge via swnode
- Remove unused file entry; MAINTAINERS
- Make interrupt line optional; tps65086
- Rename db8500-cpuidle driver symbol; db8500-prcmu
- Remove support for unused hardware; tqmx86
- Provide a standard LPC clock frequency for unknown boards; tqmx86
- Remove unused code; ti_am335x_tscadc
- Use of_iomap() instead of ioremap(); syscon
Bug Fixes:
- Clear GPIO IRQ resource flags when no IRQ is set; tqmx86
- Fix incorrect/misleading frequencies; db8500-prcmu
- Mitigate namespace clash with other GPIOBASE users"
* tag 'mfd-next-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (31 commits)
mfd: lpc_sch: Rename GPIOBASE to prevent build error
mfd: syscon: Use of_iomap() instead of ioremap()
dt-bindings: mfd: Add Broadcom CRU
mfd: ti_am335x_tscadc: Delete superfluous error message
mfd: tqmx86: Assume 24MHz LPC clock for unknown boards
mfd: tqmx86: Add support for TQ-Systems DMI IDs
mfd: tqmx86: Add support for TQMx110EB and TQMxE40x
mfd: tqmx86: Fix typo in "platform"
mfd: tqmx86: Remove incorrect TQMx90UC board ID
mfd: tqmx86: Clear GPIO IRQ resource when no IRQ is set
mfd: simple-mfd-i2c: Add support for registering devices via MFD cells
mfd/cpuidle: ux500: Rename driver symbol
mfd: tps65086: Add cell entry for reset driver
mfd: tps65086: Make interrupt line optional
dt-bindings: mfd: Convert tps65086.txt to YAML
MAINTAINERS: Adjust ARM/NOMADIK/Ux500 ARCHITECTURES to file renaming
mfd: db8500-prcmu: Handle missing FW variant
mfd: db8500-prcmu: Rename register header
mfd: axp20x: Add supplied-from property to axp288_fuel_gauge cell
mfd: Don't use irq_create_mapping() to resolve a mapping
...
- new driver: gpio-virtio allowing a guest VM running linux to access
GPIO lines provided by the host
- split the GPIO driver out of the rockchip pin control driver
- add support for a new model to gpio-aspeed-sgpio, refactor the driver
and use generic device property interfaces, improve property sanitization
- add ACPI support to gpio-tegra186
- improve the code setting the line names to support multiple GPIO banks
per device
- constify a bunch of OF functions in the core GPIO code and make the
declaration for one of the core OF functions we use consistent within its
header
- use software nodes in intel_quark_i2c_gpio
- add support for the gpio-line-names property in gpio-mt7621
- use the standard GPIO function for setting the GPIO names in gpio-brcmstb
- fix a bunch of leaks and other bugs in gpio-mpc8xxx
- use generic pm callbacks in gpio-ml-ioh
- improve resource management and PM handling in gpio-mlxbf2
- modernize and improve the gpio-dwapb driver
- coding style improvements in gpio-rcar
- documentation fixes and improvements
- update the MAINTAINERS entry for gpio-zynq
- minor tweaks in several drivers
-----BEGIN PGP SIGNATURE-----
iQIzBAABCAAdFiEEFp3rbAvDxGAT0sefEacuoBRx13IFAmE3ItgACgkQEacuoBRx
13LKqA//Q2E9QYJx0lLO0C15JKzJjqYGyVqSm73Huo8pKWRSKr9YuB4/tBPKz5Ya
pg/h7wbsk+mtQ0pqot/SEGVLo1rK6ZcPiCDkYkuaVsY9pS0zX7A/Sb2N7xKML+Nj
wTFuhSZH2byxH6QgUrX3RLMagW4p/owlDvFjZ6Z6Vh8Ulsnb0pdL3nYg5L017GMT
A1ySzbP79NK3LfOLTqdqgALv4EF2x+paolyEpI/Jv0naBYkIP4AcbOBQEVMpoCY/
XEcIdPvqMyPm4PdYSy3iCqtkf7jclDbV030SHlir2bKHjI79l8ARy0Tu6hvISRSG
8XMwt6ke40GYnPkESZTkWlqeVHYzli84FxYXYLnqFa/21c4qswHk/aZZq5h83fn8
7aonkEQQuHfQM00MvLu0mhtKXYdLbqv7jjd0CYChwxQSpu0iu7IQSWW8c2YmGvvt
vqfM8TdKyGNPAmSl2/enPKOr+LugG4rcgMehU9/p6QvHbB6y2SxC1MykldPOdC6d
53PeDeNP6XOp2s10zVPWh6P0rbrMaEtv/GZ143kUw9bhb1g3woX5SaS7W76cOXhE
kty6g1e8xNaKDZbJ++UAh7G9IGQdtz0xRCXDUHFUc89uCThc9RcHowNPtzMMnmgM
ucWJ81XnGDSDyzzG/f7uhcOtszWYCOtFmteooaMGB36/pH2CG9Y=
=y/RY
-----END PGP SIGNATURE-----
Merge tag 'gpio-updates-for-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux
Pull gpio updates from Bartosz Golaszewski:
"We mostly have various improvements and refactoring all over the place
but also some interesting new features - like the virtio GPIO driver
that allows guest VMs to use host's GPIOs. We also have a new/old GPIO
driver for rockchip - this one has been split out of the pinctrl
driver.
Summary:
- new driver: gpio-virtio allowing a guest VM running linux to access
GPIO lines provided by the host
- split the GPIO driver out of the rockchip pin control driver
- add support for a new model to gpio-aspeed-sgpio, refactor the
driver and use generic device property interfaces, improve property
sanitization
- add ACPI support to gpio-tegra186
- improve the code setting the line names to support multiple GPIO
banks per device
- constify a bunch of OF functions in the core GPIO code and make the
declaration for one of the core OF functions we use consistent
within its header
- use software nodes in intel_quark_i2c_gpio
- add support for the gpio-line-names property in gpio-mt7621
- use the standard GPIO function for setting the GPIO names in
gpio-brcmstb
- fix a bunch of leaks and other bugs in gpio-mpc8xxx
- use generic pm callbacks in gpio-ml-ioh
- improve resource management and PM handling in gpio-mlxbf2
- modernize and improve the gpio-dwapb driver
- coding style improvements in gpio-rcar
- documentation fixes and improvements
- update the MAINTAINERS entry for gpio-zynq
- minor tweaks in several drivers"
* tag 'gpio-updates-for-v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux: (35 commits)
gpio: mpc8xxx: Use 'devm_gpiochip_add_data()' to simplify the code and avoid a leak
gpio: mpc8xxx: Fix a potential double iounmap call in 'mpc8xxx_probe()'
gpio: mpc8xxx: Fix a resources leak in the error handling path of 'mpc8xxx_probe()'
gpio: viperboard: remove platform_set_drvdata() call in probe
gpio: virtio: Add missing mailings lists in MAINTAINERS entry
gpio: virtio: Fix sparse warnings
gpio: remove the obsolete MX35 3DS BOARD MC9S08DZ60 GPIO functions
gpio: max730x: Use the right include
gpio: Add virtio-gpio driver
gpio: mlxbf2: Use DEFINE_RES_MEM_NAMED() helper macro
gpio: mlxbf2: Use devm_platform_ioremap_resource()
gpio: mlxbf2: Drop wrong use of ACPI_PTR()
gpio: mlxbf2: Convert to device PM ops
gpio: dwapb: Get rid of legacy platform data
mfd: intel_quark_i2c_gpio: Convert GPIO to use software nodes
gpio: dwapb: Read GPIO base from gpio-base property
gpio: dwapb: Unify ACPI enumeration checks in get_irq() and configure_irqs()
gpiolib: Deduplicate forward declaration in the consumer.h header
MAINTAINERS: update gpio-zynq.yaml reference
gpio: tegra186: Add ACPI support
...
-----BEGIN PGP SIGNATURE-----
iHUEABYIAB0WIQSQHSd0lITzzeNWNm3h3BK/laaZPAUCYTcNYgAKCRDh3BK/laaZ
PCaHAQCTfaWYK+H6kNIffxnRG+yGsMAmoZLGbc5l9M5GeTEmtgEA0vkmWbDt4h/I
PSA0Q2T0gzSsBdxkF4jQHqKO+HGMVg8=
=Vh9A
-----END PGP SIGNATURE-----
Merge tag 'fuse-update-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse
Pull fuse updates from Miklos Szeredi:
- Allow mounting an active fuse device. Previously the fuse device
would always be mounted during initialization, and sharing a fuse
superblock was only possible through mount or namespace cloning
- Fix data flushing in syncfs (virtiofs only)
- Fix data flushing in copy_file_range()
- Fix a possible deadlock in atomic O_TRUNC
- Misc fixes and cleanups
* tag 'fuse-update-5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
fuse: remove unused arg in fuse_write_file_get()
fuse: wait for writepages in syncfs
fuse: flush extending writes
fuse: truncate pagecache on atomic_o_trunc
fuse: allow sharing existing sb
fuse: move fget() to fuse_get_tree()
fuse: move option checking into fuse_fill_super()
fuse: name fs_context consistently
fuse: fix use after free in fuse_read_interrupt()
Changes for kgdb/kdb this cycle are dominated by a change from
Sumit that removes as small (256K) private heap from kdb. This is
change I've hoped for ever since I discovered how few users of this
heap remained in the kernel, so many thanks to Sumit for hunting
these down. Other change is an incremental step towards SPDX headers.
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
-----BEGIN PGP SIGNATURE-----
iQIzBAABCgAdFiEELzVBU1D3lWq6cKzwfOMlXTn3iKEFAmE2OuUACgkQfOMlXTn3
iKEcTQ/7BiMPnSzPeh7srNIG1a7/ig8CUtu+qMsrU50BUvCBzhas3+fGbzlZHV4p
GwCGTuRDWhVJjntpCkLYroSSF0h/AhN68pxqUx6EJUWEYMGuuMBuVtAdXYMSYbse
MW+Jw6Tec2fWPyw6lyWd0vwOKLzhf/pC8axbmGESzgdmZrsWeA4XEeF5XRHsHyJf
pL4GvBXN/mzH2TSQNQmSgda5VLnK3m6B66tlT17mywG8QTKwID8I4LXs9doNwqeW
6fkwJswAsCa+nO1GjMsRcA8HoUd7mtqLCYbjZzFVQdFJ6kF9eBKSPvgbaqr6oNvv
t6VBfm908+fM4/4yEQSuwVPT32IPe7I/Bk+aUqnSpPiXU8v75u0lIfB929O/DS07
X+NjqpXN7v6mEpLAFgWhqPyzTODw40OhpOi1uf9jzPB/OSNm9y1zs21FJQSx6KGa
AahMHrRoeZwlxNdD/2RBf9pQCSBWF5R1DyIye2iQX+e/jrvTXHMCK33tpcbcE9Cl
bMVqnnJ4Pnmul6hAAf9WlJduIrACV1Oq1iQrtXWE3wdFZdQuvqKvwHUK/Zko+O0f
cdW6neyW7Slo+8q2qXuEE0Bp+Ae61oZTrGIdfj29ZdXwp0+sBzcA5CFO7MKPJllV
yEq41Bxc3cgJPcsFMZWSaHcEAI5fq1iBmquVdCA0/vYbP9dsO1U=
=iMIF
-----END PGP SIGNATURE-----
Merge tag 'kgdb-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/danielt/linux
Pull kgdb updates from Daniel Thompson:
"Changes for kgdb/kdb this cycle are dominated by a change from Sumit
that removes as small (256K) private heap from kdb. This is change
I've hoped for ever since I discovered how few users of this heap
remained in the kernel, so many thanks to Sumit for hunting these
down.
The other change is an incremental step towards SPDX headers"
* tag 'kgdb-5.15-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/danielt/linux:
kernel: debug: Convert to SPDX identifier
kdb: Rename members of struct kdbtab_t
kdb: Simplify kdb_defcmd macro logic
kdb: Get rid of redundant kdb_register_flags()
kdb: Rename struct defcmd_set to struct kdb_macro
kdb: Get rid of custom debug heap allocator
This reverts commit b655843444.
Just like with the memcg lock accounting, the kernel test robot reports
a sizeable performance regression for this commit, and while it clearly
does the rigth thing in theory, we'll need to look at just how to avoid
or minimize the performance overhead of the memcg accounting.
People already have suggestions on how to do that, but it's "future
work".
So revert it for now.
[ Note: the first link below is for this same commit but a different
commit ID, because it's the kernel test robot ended up noticing it in
Andrew Morton's patch queue ]
Link: https://lore.kernel.org/lkml/20210905132732.GC15026@xsang-OptiPlex-9020/
Link: https://lore.kernel.org/lkml/20210907150757.GE17617@xsang-OptiPlex-9020/
Acked-by: Jens Axboe <axboe@kernel.dk>
Acked-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Roman Gushchin <guro@fb.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This reverts commit 0f12156dff.
The kernel test robot reports a sizeable performance regression for this
commit, and while it clearly does the rigth thing in theory, we'll need
to look at just how to avoid or minimize the performance overhead of the
memcg accounting.
People already have suggestions on how to do that, but it's "future
work".
So revert it for now.
Link: https://lore.kernel.org/lkml/20210907150757.GE17617@xsang-OptiPlex-9020/
Acked-by: Jens Axboe <axboe@kernel.dk>
Acked-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Roman Gushchin <guro@fb.com>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This reverts commit 9857a17f20.
That commit was completely broken, and I should have caught on to it
earlier. But happily, the kernel test robot noticed the breakage fairly
quickly.
The breakage is because "try_get_page()" is about avoiding the page
reference count overflow case, but is otherwise the exact same as a
plain "get_page()".
In contrast, "try_get_compound_head()" is an entirely different beast,
and uses __page_cache_add_speculative() because it's not just about the
page reference count, but also about possibly racing with the underlying
page going away.
So all the commentary about how
"try_get_page() has fallen a little behind in terms of maintenance,
try_get_compound_head() handles speculative page references more
thoroughly"
was just completely wrong: yes, try_get_compound_head() handles
speculative page references, but the point is that try_get_page() does
not, and must not.
So there's no lack of maintainance - there are fundamentally different
semantics.
A speculative page reference would be entirely wrong in "get_page()",
and it's entirely wrong in "try_get_page()". It's not about
speculation, it's purely about "uhhuh, you can't get this page because
you've tried to increment the reference count too much already".
The reason the kernel test robot noticed this bug was that it hit the
VM_BUG_ON() in __page_cache_add_speculative(), which is all about
verifying that the context of any speculative page access is correct.
But since that isn't what try_get_page() is all about, the VM_BUG_ON()
tests things that are not correct to test for try_get_page().
Reported-by: kernel test robot <oliver.sang@intel.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
