Pull documentation fixes from Jonathan Corbet:
 "A handful of relatively small documentation fixes"

* tag 'docs-5.11-3' of git://git.lwn.net/linux:
  docs: admin-guide: bootconfig: Fix feils to fails
  Documentation/admin-guide: kernel-parameters: hyphenate comma-separated
  docs: binfmt-misc: Fix .rst formatting
  docs: remove mention of ENABLE_MUST_CHECK
  atomic: remove further references to atomic_ops
  Documentation: doc-guide: fixes to sphinx.rst
  docs/mm: concepts.rst: Correct the threshold to low watermark
  Documentation: admin: early_param()s are also listed in kernel-parameters
  docs: Fix reST markup when linking to sections

Pull device properties framework fixes from Rafael Wysocki:
 "Revert a problematic commit that went in during the 5.10 cycle and
  improve the kerneldoc description of the function affected by it (both
  changes from Bard Liao)"

* tag 'devprop-5.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  device property: add description of fwnode cases
  Revert "device property: Keep secondary firmware node secondary by type"

Pull ACPI fixes from Rafael Wysocki:
 "These address two build issues and drop confusing text from a couple
  of Kconfig entries.

  Specifics:

   - Drop two local variables that are never read and the code updating
     their values from the x86 suspend-to-idle code (Rafael Wysocki)

   - Add empty stub of an ACPI helper function to avoid build issues
     when CONFIG_ACPI is not set (Shawn Guo)

   - Remove confusing text regarding modules from Kconfig entries that
     correspond to non-modular code (Peter Robinson)"

* tag 'acpi-5.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI: Update Kconfig help text for items that are no longer modular
  ACPI: scan: add stub acpi_create_platform_device() for !CONFIG_ACPI
  ACPI: PM: s2idle: Drop unused local variables and related code

Pull power management fixes from Rafael Wysocki:
 "These address two issues in the intel_pstate driver and one in the
  powernow-k8 cpufreq driver.

  Specifics:

   - Make the powernow-k8 cpufreq driver avoid calling
     cpufreq_cpu_get(), which theoretically may return NULL, to get a
     policy pointer that is known to it already (Colin Ian King)

   - Drop two functions that are not used any more from the intel_pstate
     driver (Lukas Bulwahn)

   - Make intel_pstate check the HWP capabilities to get the maximum
     available P-state in the passive mode to avoid using a stale value
     of it in case of out-of-band updates (Rafael Wysocki)"

* tag 'pm-5.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  cpufreq: intel_pstate: remove obsolete functions
  cpufreq: powernow-k8: pass policy rather than use cpufreq_cpu_get()
  cpufreq: intel_pstate: Use HWP capabilities in intel_cpufreq_adjust_perf()

Pull drm fixes from Daniel Vetter:
 "Looks like people are back from the break, usual small pile of fixes
  all over. Next week Dave should be back.

  The only thing pending I'm aware of is a "this shouldn't have become
  uapi" reverts for amdgpu, but they're already on the list and not that
  important really so can wait another week.

  Summary:

   - fix for ttm list corruption in radeon, reported by a few people

   - fixes for amdgpu, i915, msm

   - dma-buf use-after free fix"

* tag 'drm-fixes-2021-01-08' of git://anongit.freedesktop.org/drm/drm: (29 commits)
  drm/msm: Only enable A6xx LLCC code on A6xx
  drm/msm: Add modparam to allow vram carveout
  drm/msm: Call msm_init_vram before binding the gpu
  drm/msm/dp: postpone irq_hpd event during connection pending state
  drm/ttm: unexport ttm_pool_init/fini
  drm/radeon: stop re-init the TTM page pool
  dmabuf: fix use-after-free of dmabuf's file->f_inode
  Revert "drm/amd/display: Fix memory leaks in S3 resume"
  drm/amdgpu/display: drop DCN support for aarch64
  drm/amdgpu: enable ras eeprom support for sienna cichlid
  drm/amdgpu: fix no bad_pages issue after umc ue injection
  drm/amdgpu: fix potential memory leak during navi12 deinitialization
  drm/amd/display: Fix unused variable warning
  drm/amd/pm: improve the fine grain tuning function for RV/RV2/PCO
  drm/amd/pm: fix the failure when change power profile for renoir
  drm/amdgpu: fix a GPU hang issue when remove device
  drm/amdgpu: fix a memory protection fault when remove amdgpu device
  drm/amdgpu: switched to cached noretry setting for vangogh
  drm/amd/display: fix sysfs amdgpu_current_backlight_pwm NULL pointer issue
  drm/amd/pm: updated PM to I2C controller port on sienna cichlid
  ...

Pull kvm fixes from Paolo Bonzini:
 "x86:
   - Fixes for the new scalable MMU
   - Fixes for migration of nested hypervisors on AMD
   - Fix for clang integrated assembler
   - Fix for left shift by 64 (UBSAN)
   - Small cleanups
   - Straggler SEV-ES patch

  ARM:
   - VM init cleanups
   - PSCI relay cleanups
   - Kill CONFIG_KVM_ARM_PMU
   - Fixup __init annotations
   - Fixup reg_to_encoding()
   - Fix spurious PMCR_EL0 access

  Misc:
   - selftests cleanups"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (38 commits)
  KVM: x86: __kvm_vcpu_halt can be static
  KVM: SVM: Add support for booting APs in an SEV-ES guest
  KVM: nSVM: cancel KVM_REQ_GET_NESTED_STATE_PAGES on nested vmexit
  KVM: nSVM: mark vmcb as dirty when forcingly leaving the guest mode
  KVM: nSVM: correctly restore nested_run_pending on migration
  KVM: x86/mmu: Clarify TDP MMU page list invariants
  KVM: x86/mmu: Ensure TDP MMU roots are freed after yield
  kvm: check tlbs_dirty directly
  KVM: x86: change in pv_eoi_get_pending() to make code more readable
  MAINTAINERS: Really update email address for Sean Christopherson
  KVM: x86: fix shift out of bounds reported by UBSAN
  KVM: selftests: Implement perf_test_util more conventionally
  KVM: selftests: Use vm_create_with_vcpus in create_vm
  KVM: selftests: Factor out guest mode code
  KVM/SVM: Remove leftover __svm_vcpu_run prototype from svm.c
  KVM: SVM: Add register operand to vmsave call in sev_es_vcpu_load
  KVM: x86/mmu: Optimize not-present/MMIO SPTE check in get_mmio_spte()
  KVM: x86/mmu: Use raw level to index into MMIO walks' sptes array
  KVM: x86/mmu: Get root level from walkers when retrieving MMIO SPTE
  KVM: x86/mmu: Use -1 to flag an undefined spte in get_mmio_spte()
  ...

Pull iommu fixes from Will Deacon:
 "This is mainly all Intel VT-D stuff, but there are some fixes for AMD
  and ARM as well.

  We've also got the revert I promised during the merge window, which
  removes a temporary hack to accomodate i915 while we transitioned the
  Intel IOMMU driver over to the common DMA-IOMMU API.

  Finally, there are still a couple of other VT-D fixes floating around,
  so I expect to send you another batch of fixes next week.

  Summary:

   - Fix VT-D TLB invalidation for subdevices

   - Fix VT-D use-after-free on subdevice detach

   - Fix VT-D locking so that IRQs are disabled during SVA bind/unbind

   - Fix VT-D address alignment when flushing IOTLB

   - Fix memory leak in VT-D IRQ remapping failure path

   - Revert temporary i915 sglist hack now that it is no longer required

   - Fix sporadic boot failure with Arm SMMU on Qualcomm SM8150

   - Fix NULL dereference in AMD IRQ remapping code with remapping disabled

   - Fix accidental enabling of irqs on AMD resume-from-suspend path

   - Fix some typos in comments"

* tag 'iommu-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  iommu/vt-d: Fix ineffective devTLB invalidation for subdevices
  iommu/vt-d: Fix general protection fault in aux_detach_device()
  iommu/vt-d: Move intel_iommu info from struct intel_svm to struct intel_svm_dev
  iommu/arm-smmu-qcom: Initialize SCTLR of the bypass context
  iommu/vt-d: Fix lockdep splat in sva bind()/unbind()
  Revert "iommu: Add quirk for Intel graphic devices in map_sg"
  iommu/vt-d: Fix misuse of ALIGN in qi_flush_piotlb()
  iommu/amd: Stop irq_remapping_select() matching when remapping is disabled
  iommu/amd: Set iommu->int_enabled consistently when interrupts are set up
  iommu/intel: Fix memleak in intel_irq_remapping_alloc
  iommu/iova: fix 'domain' typos

Pull ARM SoC fixes from Arnd Bergmann:
 "These are a small number of bug fixes that all came in before or
  during the merge window, most for the omap platform:

   - One boot regression fix for Nokia N9 (OMAP3).

   - Two small defconfig changes for omap2, to reflect changes in
     drivers

   - Warning fixes for DT issues on omap2, picoxcell and bitmap SoCs.

     The picoxcell platform will be removed in v5.12, but fixing it
     first makes it easier to backport to the fix to stable kernels and
     get a clean build with new dtc versions"

* tag 'arm-fixes-5.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc:
  ARM: picoxcell: fix missing interrupt-parent properties
  ARM: dts: ux500/golden: Set display max brightness
  arm64: dts: bitmain: Use generic "ngpios" rather than "snps,nr-gpios"
  ARM: omap2: pmic-cpcap: fix maximum voltage to be consistent with defaults on xt875
  ARM: omap2plus_defconfig: enable SPI GPIO
  ARM: OMAP2+: omap_device: fix idling of devices during probe
  ARM: dts: OMAP3: disable AES on N950/N9
  ARM: omap2plus_defconfig: drop unused POWER_AVS option

Pull arm64 fixes from Catalin Marinas:

 - Clean-ups following the merging window: remove unused variable,
   duplicate includes, superfluous barrier, move some inline asm to
   separate functions.

 - Disable top-byte-ignore on kernel code addresses with KASAN/MTE
   enabled (already done when MTE is disabled).

 - Fix ARCH_LOW_ADDRESS_LIMIT definition with CONFIG_ZONE_DMA disabled.

 - Compiler/linker flags: link with "-z norelno", discard .eh_frame_hdr
   instead of --no-eh-frame-hdr.

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: Move PSTATE.TCO setting to separate functions
  arm64: kasan: Set TCR_EL1.TBID1 when KASAN_HW_TAGS is enabled
  arm64: vdso: disable .eh_frame_hdr via /DISCARD/ instead of --no-eh-frame-hdr
  arm64: traps: remove duplicate include statement
  arm64: link with -z norelro for LLD or aarch64-elf
  arm64: mm: Fix ARCH_LOW_ADDRESS_LIMIT when !CONFIG_ZONE_DMA
  arm64: mte: remove an ISB on kernel exit
  arm64/smp: Remove unused irq variable in arch_show_interrupts()

Pull more networking fixes from Jakub Kicinski:
 "Slightly lighter pull request to get back into the Thursday cadence.

  Current release - always broken:

   - can: mcp251xfd: fix Tx/Rx ring buffer driver race conditions

   - dsa: hellcreek: fix led_classdev build errors

  Previous releases - regressions:

   - ipv6: fib: flush exceptions when purging route to avoid netdev
     reference leak

   - ip_tunnels: fix pmtu check in nopmtudisc mode

   - ip: always refragment ip defragmented packets to avoid MTU issues
     when forwarding through tunnels, correct "packet too big" message
     is prohibitively tricky to generate

   - s390/qeth: fix locking for discipline setup / removal and during
     recovery to prevent both deadlocks and races

   - mlx5: Use port_num 1 instead of 0 when delete a RoCE address

  Previous releases - always broken:

   - cdc_ncm: correct overhead calculation in delayed_ndp_size to
     prevent out of bound accesses with Huawei 909s-120 LTE module

   - fix stmmac dwmac-sun8i suspend/resume:
           - PHY being left powered off
           - MAC syscon configuration being reset
           - reference to the reset controller being improperly dropped

   - qrtr: fix null-ptr-deref in qrtr_ns_remove

   - can: tcan4x5x: fix bittiming const, use common bittiming from m_can
     driver

   - mlx5e: CT: Use per flow counter when CT flow accounting is enabled

   - mlx5e: Fix SWP offsets when vlan inserted by driver

  Misc:

   - bpf: Fix a task_iter bug caused by a bpf -> net merge conflict
     resolution

  And the usual many fixes to various error paths"

* tag 'net-5.11-rc3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (69 commits)
  net: dsa: lantiq_gswip: Exclude RMII from modes that report 1 GbE
  s390/qeth: fix L2 header access in qeth_l3_osa_features_check()
  s390/qeth: fix locking for discipline setup / removal
  s390/qeth: fix deadlock during recovery
  selftests: fib_nexthops: Fix wrong mausezahn invocation
  nexthop: Bounce NHA_GATEWAY in FDB nexthop groups
  nexthop: Unlink nexthop group entry in error path
  nexthop: Fix off-by-one error in error path
  octeontx2-af: fix memory leak of lmac and lmac->name
  chtls: Fix chtls resources release sequence
  chtls: Added a check to avoid NULL pointer dereference
  chtls: Replace skb_dequeue with skb_peek
  chtls: Avoid unnecessary freeing of oreq pointer
  chtls: Fix panic when route to peer not configured
  chtls: Remove invalid set_tcb call
  chtls: Fix hardware tid leak
  net: ip: always refragment ip defragmented packets
  net: fix pmtu check in nopmtudisc mode
  selftests: netfilter: add selftest for ipip pmtu discovery with enabled connection tracking
  docs: octeontx2: tune rst markup
  ...

Pull crypto fixes from Herbert Xu:
 "This fixes a functional bug in arm/chacha-neon as well as a potential
  buffer overflow in ecdh"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: ecdh - avoid buffer overflow in ecdh_set_secret()
  crypto: arm/chacha-neon - add missing counter increment

The kernel test robot reported a -5.8% performance regression on the
"poll2" test of will-it-scale, and bisected it to commit d55564cf
("x86: Make __put_user() generate an out-of-line call").

I didn't expect an out-of-line __put_user() to matter, because no normal
core code should use that non-checking legacy version of user access any
more.  But I had overlooked the very odd poll() usage, which does a
__put_user() to update the 'revents' values of the poll array.

Now, Al Viro correctly points out that instead of updating just the
'revents' field, it would be much simpler to just copy the _whole_
pollfd entry, and then we could just use "copy_to_user()" on the whole
array of entries, the same way we use "copy_from_user()" a few lines
earlier to get the original values.

But that is not what we've traditionally done, and I worry that threaded
applications might be concurrently modifying the other fields of the
pollfd array.  So while Al's suggestion is simpler - and perhaps worth
trying in the future - this instead keeps the "just update revents"
model.

To fix the performance regression, use the modern "unsafe_put_user()"
instead of __put_user(), with the proper "user_write_access_begin()"
guarding in place. This improves code generation enormously.

Link: https://lore.kernel.org/lkml/20210107134723.GA28532@xsang-OptiPlex-9020/Reported-by: kernel test robot <oliver.sang@intel.com>
Tested-by: Oliver Sang <oliver.sang@intel.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: David Laight <David.Laight@aculab.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

This reverts commit 757055ae.

The commit caused that ttynull was used as the default console
on several systems[1][2][3]. As a result, the console was
blank even when a better alternative existed.

It happened when there was no console configured
on the command line and ttynull_init() was the first initcall
calling register_console().

Or it happened when /dev/ did not exist when console_on_rootfs()
was called. It was not able to open /dev/console even though
a console driver was registered. It tried to add ttynull console
but it obviously did not help. But ttynull became the preferred
console and was used by /dev/console when it was available later.

The commit tried to fix a historical problem that have been there
for ages. The primary motivation was the commit 3cffa06a
("printk/console: Allow to disable console output by using console=""
 or console=null"). It provided a clean solution for a workaround
 that was widely used and worked only by chance.

This revert causes that the console="" or console=null command line
options will again work only by chance. These options will cause that
a particular console will be preferred and the default (tty) ones
will not get enabled. There will be no console registered at
all. As a result there won't be stdin, stdout, and stderr for
the init process. But it worked exactly this way even before.

The proper solution has to fulfill many conditions:

  + Register ttynull only when explicitly required or as
    the ultimate fallback.

  + ttynull should get associated with /dev/console but it must
    not become preferred console when used as a fallback.
    Especially, it must still be possible to replace it
    by a better console later.

Such a change requires clean up of the register_console() code.
Otherwise, it would be even harder to follow. Especially, the use
of has_preferred_console and CON_CONSDEV flag is tricky. The clean
up is risky. The ordering of consoles is not well defined. And
any changes tend to break existing user settings.

Do the revert at the least risky solution for now.

[1] https://lore.kernel.org/linux-kselftest/20201221144302.GR4077@smile.fi.intel.com/
[2] https://lore.kernel.org/lkml/d2a3b3c0-e548-7dd1-730f-59bc5c04e191@synopsys.com/
[3] https://patchwork.ozlabs.org/project/linux-um/patch/20210105120128.10854-1-thomas@m3y3r.de/Reported-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reported-by: Vineet Gupta <vgupta@synopsys.com>
Reported-by: Thomas Meyer <thomas@m3y3r.de>
Signed-off-by: Petr Mladek <pmladek@suse.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

* acpi-scan:
  ACPI: scan: add stub acpi_create_platform_device() for !CONFIG_ACPI

* acpi-misc:
  ACPI: Update Kconfig help text for items that are no longer modular

dtc points out that the interrupts for some devices are not parsable:

picoxcell-pc3x2.dtsi:45.19-49.5: Warning (interrupts_property): /paxi/gem@30000: Missing interrupt-parent
picoxcell-pc3x2.dtsi:51.21-55.5: Warning (interrupts_property): /paxi/dmac@40000: Missing interrupt-parent
picoxcell-pc3x2.dtsi:57.21-61.5: Warning (interrupts_property): /paxi/dmac@50000: Missing interrupt-parent
picoxcell-pc3x2.dtsi:233.21-237.5: Warning (interrupts_property): /rwid-axi/axi2pico@c0000000: Missing interrupt-parent

There are two VIC instances, so it's not clear which one needs to be
used. I found the BSP sources that reference VIC0, so use that:

https://github.com/r1mikey/meta-picoxcell/blob/master/recipes-kernel/linux/linux-picochip-3.0/0001-picoxcell-support-for-Picochip-picoXcell-SoC.patchAcked-by: Jamie Iles <jamie@jamieiles.com>
Link: https://lore.kernel.org/r/20201230152010.3914962-1-arnd@kernel.org'
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

Merge tag 'kvmarm-fixes-5.11-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm64 fixes for 5.11, take #1

- VM init cleanups
- PSCI relay cleanups
- Kill CONFIG_KVM_ARM_PMU
- Fixup __init annotations
- Fixup reg_to_encoding()
- Fix spurious PMCR_EL0 access

* dma-buf: fix a use-after-free
* radeon: don't init the TTM page pool manually
* ttm: unexport ttm_pool_{init,fini}()
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
From: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://patchwork.freedesktop.org/patch/msgid/X/gnKs52t8xUuAlE@linux-uq9g

A few misc fixes from Rob, mostly fallout from the locking rework that
landed in the merge window, plus a few smaller things.
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
From: Rob Clark <robdclark@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/CAF6AEGtWMhzyD6kejmViZeZ+zfJxRvfq-R2t_zA+DcDiTxsYRQ@mail.gmail.com

Saeed Mahameed says:

====================
mlx5 fixes 2021-01-07

* tag 'mlx5-fixes-2021-01-07' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux:
  net/mlx5e: Fix memleak in mlx5e_create_l2_table_groups
  net/mlx5e: Fix two double free cases
  net/mlx5: Release devlink object if adev fails
  net/mlx5e: ethtool, Fix restriction of autoneg with 56G
  net/mlx5e: In skb build skip setting mark in switchdev mode
  net/mlx5: E-Switch, fix changing vf VLANID
  net/mlx5e: Fix SWP offsets when vlan inserted by driver
  net/mlx5e: CT: Use per flow counter when CT flow accounting is enabled
  net/mlx5: Use port_num 1 instead of 0 when delete a RoCE address
  net/mlx5e: Add missing capability check for uplink follow
  net/mlx5: Check if lag is supported before creating one
====================

Link: https://lore.kernel.org/r/20210107202845.470205-1-saeed@kernel.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Exclude RMII from modes that report 1 GbE support. Reduced MII supports
up to 100 MbE.

Fixes: 14fceff4 ("net: dsa: Add Lantiq / Intel DSA driver for vrx200")
Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20210107195818.3878-1-olek2@wp.plSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Julian Wiedmann says:

====================
s390/qeth: fixes 2021-01-07

This brings two locking fixes for the device control path.
Also one fix for a path where our .ndo_features_check() attempts to
access a non-existent L2 header.
====================

Link: https://lore.kernel.org/r/20210107172442.1737-1-jwi@linux.ibm.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

ip_finish_output_gso() may call .ndo_features_check() even before the
skb has a L2 header. This conflicts with qeth_get_ip_version()'s attempt
to inspect the L2 header via vlan_eth_hdr().

Switch to vlan_get_protocol(), as already used further down in the
common qeth_features_check() path.

Fixes: f13ade19 ("s390/qeth: run non-offload L3 traffic over common xmit path")
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Due to insufficient locking, qeth_core_set_online() and
qeth_dev_layer2_store() can run in parallel, both attempting to load &
setup the discipline (and stepping on each other toes along the way).
A similar race can also occur between qeth_core_remove_device() and
qeth_dev_layer2_store().

Access to .discipline is meant to be protected by the discipline_mutex,
so add/expand the locking in qeth_core_remove_device() and
qeth_core_set_online().
Adjust the locking in qeth_l*_remove_device() accordingly, as it's now
handled by the callers in a consistent manner.

Based on an initial patch by Ursula Braun.

Fixes: 9dc48ccc ("qeth: serialize sysfs-triggered device configurations")
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Reviewed-by: Alexandra Winter <wintera@linux.ibm.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

When qeth_dev_layer2_store() - holding the discipline_mutex - waits
inside qeth_l*_remove_device() for a qeth_do_reset() thread to complete,
we can hit a deadlock if qeth_do_reset() concurrently calls
qeth_set_online() and thus tries to aquire the discipline_mutex.

Move the discipline_mutex locking outside of qeth_set_online() and
qeth_set_offline(), and turn the discipline into a parameter so that
callers understand the dependency.

To fix the deadlock, we can now relax the locking:
As already established, qeth_l*_remove_device() waits for
qeth_do_reset() to complete. So qeth_do_reset() itself is under no risk
of having card->discipline ripped out while it's running, and thus
doesn't need to take the discipline_mutex.

Fixes: 9dc48ccc ("qeth: serialize sysfs-triggered device configurations")
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Reviewed-by: Alexandra Winter <wintera@linux.ibm.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Ido Schimmel says:

====================
nexthop: Various fixes

This series contains various fixes for the nexthop code. The bugs were
uncovered during the development of resilient nexthop groups.

Patches #1-#2 fix the error path of nexthop_create_group(). I was not
able to trigger these bugs with current code, but it is possible with
the upcoming resilient nexthop groups code which adds a user
controllable memory allocation further in the function.

Patch #3 fixes wrong validation of netlink attributes.

Patch #4 fixes wrong invocation of mausezahn in a selftest.
====================

Link: https://lore.kernel.org/r/20210107144824.1135691-1-idosch@idosch.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

For IPv6 traffic, mausezahn needs to be invoked with '-6'. Otherwise an
error is returned:

 # ip netns exec me mausezahn veth1 -B 2001:db8:101::2 -A 2001:db8:91::1 -c 0 -t tcp "dp=1-1023, flags=syn"
 Failed to set source IPv4 address. Please check if source is set to a valid IPv4 address.
  Invalid command line parameters!

Fixes: 7c741868 ("selftests: Add torture tests to nexthop tests")
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

The function nh_check_attr_group() is called to validate nexthop groups.
The intention of that code seems to have been to bounce all attributes
above NHA_GROUP_TYPE except for NHA_FDB. However instead it bounces all
these attributes except when NHA_FDB attribute is present--then it accepts
them.

NHA_FDB validation that takes place before, in rtm_to_nh_config(), already
bounces NHA_OIF, NHA_BLACKHOLE, NHA_ENCAP and NHA_ENCAP_TYPE. Yet further
back, NHA_GROUPS and NHA_MASTER are bounced unconditionally.

But that still leaves NHA_GATEWAY as an attribute that would be accepted in
FDB nexthop groups (with no meaning), so long as it keeps the address
family as unspecified:

 # ip nexthop add id 1 fdb via 127.0.0.1
 # ip nexthop add id 10 fdb via default group 1

The nexthop code is still relatively new and likely not used very broadly,
and the FDB bits are newer still. Even though there is a reproducer out
there, it relies on an improbable gateway arguments "via default", "via
all" or "via any". Given all this, I believe it is OK to reformulate the
condition to do the right thing and bounce NHA_GATEWAY.

Fixes: 38428d68 ("nexthop: support for fdb ecmp nexthops")
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

In case of error, remove the nexthop group entry from the list to which
it was previously added.

Fixes: 430a0491 ("nexthop: Add support for nexthop groups")
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

A reference was not taken for the current nexthop entry, so do not try
to put it in the error path.

Fixes: 430a0491 ("nexthop: Add support for nexthop groups")
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Currently the error return paths don't kfree lmac and lmac->name
leading to some memory leaks.  Fix this by adding two error return
paths that kfree these objects

Addresses-Coverity: ("Resource leak")
Fixes: 1463f382 ("octeontx2-af: Add support for CGX link management")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20210107123916.189748-1-colin.king@canonical.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Ayush Sawal says:

====================
Bug fixes for chtls driver

patch 1: Fix hardware tid leak.
patch 2: Remove invalid set_tcb call.
patch 3: Fix panic when route to peer not configured.
patch 4: Avoid unnecessary freeing of oreq pointer.
patch 5: Replace skb_dequeue with skb_peek.
patch 6: Added a check to avoid NULL pointer dereference patch.
patch 7: Fix chtls resources release sequence.
====================

Link: https://lore.kernel.org/r/20210106042912.23512-1-ayush.sawal@chelsio.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

CPL_ABORT_RPL is sent after releasing the resources by calling
chtls_release_resources(sk); and chtls_conn_done(sk);
eventually causing kernel panic. Fixing it by calling release
in appropriate order.

Fixes: cc35c88a ("crypto : chtls - CPL handler definition")
Signed-off-by: Vinay Kumar Yadav <vinay.yadav@chelsio.com>
Signed-off-by: Ayush Sawal <ayush.sawal@chelsio.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

In case of server removal lookup_stid() may return NULL pointer, which
is used as listen_ctx. So added a check before accessing this pointer.

Fixes: cc35c88a ("crypto : chtls - CPL handler definition")
Signed-off-by: Vinay Kumar Yadav <vinay.yadav@chelsio.com>
Signed-off-by: Ayush Sawal <ayush.sawal@chelsio.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

The skb is unlinked twice, one in __skb_dequeue in function
chtls_reset_synq() and another in cleanup_syn_rcv_conn().
So in this patch using skb_peek() instead of __skb_dequeue(),
so that unlink will be handled only in cleanup_syn_rcv_conn().

Fixes: cc35c88a ("crypto : chtls - CPL handler definition")
Signed-off-by: Vinay Kumar Yadav <vinay.yadav@chelsio.com>
Signed-off-by: Ayush Sawal <ayush.sawal@chelsio.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

In chtls_pass_accept_request(), removing the chtls_reqsk_free()
call to avoid oreq freeing twice. Here oreq is the pointer to
struct request_sock.

Fixes: cc35c88a ("crypto : chtls - CPL handler definition")
Signed-off-by: Rohit Maheshwari <rohitm@chelsio.com>
Signed-off-by: Ayush Sawal <ayush.sawal@chelsio.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

If route to peer is not configured, we might get non tls
devices from dst_neigh_lookup() which is invalid, adding a
check to avoid it.

Fixes: cc35c88a ("crypto : chtls - CPL handler definition")
Signed-off-by: Rohit Maheshwari <rohitm@chelsio.com>
Signed-off-by: Ayush Sawal <ayush.sawal@chelsio.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

At the time of SYN_RECV, connection information is not
initialized at FW, updating tcb flag over uninitialized
connection causes adapter crash. We don't need to
update the flag during SYN_RECV state, so avoid this.

Fixes: cc35c88a ("crypto : chtls - CPL handler definition")
Signed-off-by: Rohit Maheshwari <rohitm@chelsio.com>
Signed-off-by: Ayush Sawal <ayush.sawal@chelsio.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

send_abort_rpl() is not calculating cpl_abort_req_rss offset and
ends up sending wrong TID with abort_rpl WR causng tid leaks.
Replaced send_abort_rpl() with chtls_send_abort_rpl() as it is
redundant.

Fixes: cc35c88a ("crypto : chtls - CPL handler definition")
Signed-off-by: Rohit Maheshwari <rohitm@chelsio.com>
Signed-off-by: Ayush Sawal <ayush.sawal@chelsio.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Pull gcc-plugins fix from Kees Cook:
 "Bump c++ standard version for latest GCC versions (Valdis Kletnieks)"

* tag 'gcc-plugins-v5.11-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  gcc-plugins: fix gcc 11 indigestion with plugins...