Sinan Kaya [Tue, 29 Aug 2017 19:45:45 +0000 (14:45 -0500)]
PCI: Wait up to 60 seconds for device to become ready after FLR
Sporadic reset issues have been observed with an Intel 750 NVMe drive while
assigning the physical function to the guest machine. The sequence of
events observed is as follows:
- perform a Function Level Reset (FLR)
- sleep up to 1000ms total
- read ~0 from PCI_COMMAND (CRS completion for config read)
- warn that the device didn't return from FLR
- touch the device before it's ready
- device drops config writes when we restore register settings (there's
no mechanism for software to learn about CRS completions for writes)
- incomplete register restore leaves device in inconsistent state
- device probe fails because device is in inconsistent state
After reset, an endpoint may respond to config requests with Configuration
Request Retry Status (CRS) to indicate that it is not ready to accept new
requests. See PCIe r3.1, sec 2.3.1 and 6.6.2.
Increase the timeout value from 1 second to 60 seconds to cover the period
where device responds with CRS and also report polling progress.
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
[bhelgaas: include the mandatory 100ms in the delays we print] Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Sinan Kaya [Tue, 29 Aug 2017 19:45:44 +0000 (14:45 -0500)]
PCI: Factor out pci_bus_wait_crs()
Configuration Request Retry Status (CRS) was previously hidden inside
pci_bus_read_dev_vendor_id(). We want to add support for CRS in other
situations, such as waiting for a device to become ready after a Function
Level Reset.
Move CRS handling into pci_bus_wait_crs() so it can be called from other
places.
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
[bhelgaas: pass pointer, not value, to pci_bus_wait_crs() so caller gets
correct Vendor ID] Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Sinan Kaya [Tue, 29 Aug 2017 19:45:44 +0000 (14:45 -0500)]
PCI: Add pci_bus_crs_vendor_id() to detect CRS response data
Add pci_bus_crs_vendor_id() to determine whether data returned for a config
read of the Vendor ID indicates a Configuration Request Retry Status (CRS)
response.
Per PCIe r3.1, sec 2.3.2, this data is only returned if:
- CRS Software Visibility is enabled,
- a config read includes both bytes of the Vendor ID, and
- the read receives a CRS completion
Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
[bhelgaas: changelog, change name to pci_bus_crs_vendor_id(), make static
in probe.c, use it in pci_bus_read_dev_vendor_id()] Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Bjorn Helgaas [Tue, 29 Aug 2017 19:45:43 +0000 (14:45 -0500)]
PCI: Always check for non-CRS response before timeout
While waiting for a device to become ready (i.e., to return a non-CRS
completion to a read of its Vendor ID), if we got a valid response to the
very last read before timing out, we printed a warning and gave up on the
device even though it was actually ready.
For a typical 60s timeout, we wait about 65s (it's not exact because of the
exponential backoff), but we treated devices that became ready between 33s
and 65s as though they failed.
Move the Device ID read later so we check whether the device is ready
before checking for a timeout.
Thanks to Sinan Kaya <okaya@codeaurora.org>, reorder reads so we always
check device presence after sleep, since it's pointless to sleep unless we
recheck afterwards.
Srinath Mannam [Sat, 19 Aug 2017 02:50:48 +0000 (21:50 -0500)]
PCI: Avoid race while enabling upstream bridges
When we enable a device, we first enable any upstream bridges. If a bridge
has multiple downstream devices and we enable them simultaneously, the race
to enable the upstream bridge may cause problems. Consider this hierarchy:
bridge A --+-- device B
+-- device C
If drivers for B and C call pci_enable_device() simultaneously, both will
attempt to enable A, which involves setting PCI_COMMAND_MASTER via
pci_set_master() and PCI_COMMAND_MEMORY via pci_enable_resources().
In the following sequence, B's update to set A's PCI_COMMAND_MEMORY is
lost, and neither B nor C will work correctly:
Avoid this race by holding a new pci_bridge_mutex while enabling a bridge.
This ensures that both PCI_COMMAND_MASTER and PCI_COMMAND_MEMORY will be
updated before another thread can start enabling the bridge.
Note that although pci_enable_bridge() is recursive, it enables any
upstream bridges *before* acquiring the mutex. When it acquires the mutex
and calls pci_set_master() and pci_enable_device(), any upstream bridges
have already been enabled so pci_enable_device() will not deadlock by
calling pci_enable_bridge() again.
Sinan Kaya [Wed, 12 Jul 2017 04:04:14 +0000 (00:04 -0400)]
PCI: Mark Broadcom HT2100 Root Port Extended Tags as broken
Per PCIe r3.1, sec 2.2.6.2 and 7.8.4, a Requester may not use 8-bit Tags
unless its Extended Tag Field Enable is set, but all Receivers/Completers
must handle 8-bit Tags correctly regardless of their Extended Tag Field
Enable.
Some devices do not handle 8-bit Tags as Completers, so add a quirk for
them. If we find such a device, we disable Extended Tags for the entire
hierarchy to make peer-to-peer DMA possible.
The Broadcom HT2100 seems to have issues with handling 8-bit tags. Mark it
as broken.
The pci_walk_bus() in the quirk handles devices we've enumerated in the
past, and pci_configure_device() handles devices we enumerate in the
future.
Fixes: 2ec923c4a7c3 ("PCI: Enable PCIe Extended Tags if supported") Link: https://bugzilla.redhat.com/show_bug.cgi?id=1467674 Reported-and-tested-by: Wim ten Have <wim.ten.have@oracle.com> Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
[bhelgaas: changelog, tweak messages, rename bit and quirk] Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Thomas Gleixner:
"A small set of x86 fixes:
- prevent the kernel from using the EFI reboot method when EFI is
disabled.
- two patches addressing clang issues"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/boot: Disable the address-of-packed-member compiler warning
x86/efi: Fix reboot_mode when EFI runtime services are disabled
x86/boot: #undef memcpy() et al in string.c
Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fixes from Thomas Gleixner:
"Two patches addressing build warnings caused by inconsistent kernel
doc comments"
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/wait: Clean up some documentation warnings
sched/core: Fix some documentation build warnings
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Thomas Gleixner:
"A couple of fixes for performance counters and kprobes:
- a series of small patches which make the uncore performance
counters on Skylake server systems work correctly
- add a missing instruction slot release to the failure path of
kprobes"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
kprobes/x86: Release insn_slot in failure path
perf/x86/intel/uncore: Fix missing marker for skx_uncore_cha_extra_regs
perf/x86/intel/uncore: Fix SKX CHA event extra regs
perf/x86/intel/uncore: Remove invalid Skylake server CHA filter field
perf/x86/intel/uncore: Fix Skylake server CHA LLC_LOOKUP event umask
perf/x86/intel/uncore: Fix Skylake server PCU PMU event format
perf/x86/intel/uncore: Fix Skylake UPI PMU event masks
Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull irq fix from Thomas Gleixner:
"Fix for a regression caused by the conversion of x86 to the generic
hotplug code.
Instead of doing a plain single line revert, this adds a pile of
comments so the semantics of the force argument are clear"
* 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
genirq/cpuhotplug: Revert "Set force affinity flag on hotplug migration"
Merge tag 'devicetree-fixes-for-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux
Pull DeviceTree fixes from Rob Herring:
"Two small DT fixes:
- Fix error handling in of_irq_to_resource_table() due to
of_irq_to_resource() error return changes.
- Fix dtx_diff script due to dts include path changes"
* tag 'devicetree-fixes-for-4.13' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
of: irq: fix of_irq_to_resource() error check
scripts/dtc: dtx_diff - update include dts paths to match build
Merge tag 'nfs-for-4.13-3' of git://git.linux-nfs.org/projects/anna/linux-nfs
Pull NFS client fixes from Anna Schumaker:
"More NFS client bugfixes for 4.13.
Most of these fix locking bugs that Ben and Neil noticed, but I also
have a patch to fix one more access bug that was reported after last
week.
Stable fixes:
- Fix a race where CB_NOTIFY_LOCK fails to wake a waiter
- Invalidate file size when taking a lock to prevent corruption
Other fixes:
- Don't excessively generate tiny writes with fallocate
- Use the raw NFS access mask in nfs4_opendata_access()"
* tag 'nfs-for-4.13-3' of git://git.linux-nfs.org/projects/anna/linux-nfs:
NFSv4.1: Fix a race where CB_NOTIFY_LOCK fails to wake a waiter
NFS: Optimize fallocate by refreshing mapping when needed.
NFS: invalidate file size when taking a lock.
NFS: Use raw NFS access mask in nfs4_opendata_access()
Merge tag 'xfs-4.13-fixes-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Pull xfs fixes from Darrick Wong:
- fix firstfsb variables that we left uninitialized, which could lead
to locking problems.
- check for NULL metadata buffer pointers before using them.
- don't allow btree cursor manipulation if the btree block is corrupt.
Better to just shut down.
- fix infinite loop problems in quotacheck.
- fix buffer overrun when validating directory blocks.
- fix deadlock problem in bunmapi.
* tag 'xfs-4.13-fixes-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
xfs: fix multi-AG deadlock in xfs_bunmapi
xfs: check that dir block entries don't off the end of the buffer
xfs: fix quotacheck dquot id overflow infinite loop
xfs: check _alloc_read_agf buffer pointer before using
xfs: set firstfsb to NULLFSBLOCK before feeding it to _bmapi_write
xfs: check _btree_check_block value
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM fixes from Paolo Bonzini:
"s390:
- SRCU fix
PPC:
- host crash fixes
x86:
- bugfixes, including making nested posted interrupts really work
Generic:
- tweaks to kvm_stat and to uevents"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: LAPIC: Fix reentrancy issues with preempt notifiers
tools/kvm_stat: add '-f help' to get the available event list
tools/kvm_stat: use variables instead of hard paths in help output
KVM: nVMX: Fix loss of L2's NMI blocking state
KVM: nVMX: Fix posted intr delivery when vcpu is in guest mode
x86: irq: Define a global vector for nested posted interrupts
KVM: x86: do mask out upper bits of PAE CR3
KVM: make pid available for uevents without debugfs
KVM: s390: take srcu lock when getting/setting storage keys
KVM: VMX: remove unused field
KVM: PPC: Book3S HV: Fix host crash on changing HPT size
KVM: PPC: Book3S HV: Enable TM before accessing TM registers
Merge tag 'for-linus-4.13b-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen fixes from Juergen Gross:
"Three minor cleanups for xen related drivers"
* tag 'for-linus-4.13b-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen: dont fiddle with event channel masking in suspend/resume
xen: selfballoon: remove unnecessary static in frontswap_selfshrink()
xen: Drop un-informative message during boot
Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Will Deacon:
"I'd been collecting these whilst we debugged a CPU hotplug failure,
but we ended up diagnosing that one to tglx, who has taken a fix via
the -tip tree separately.
We're seeing some NFS issues that we haven't gotten to the bottom of
yet, and we've uncovered some issues with our backtracing too so there
might be another fixes pull before we're done.
Summary:
- Ensure we have a guard page after the kernel image in vmalloc
- Fix incorrect prefetch stride in copy_page
- Ensure irqs are disabled in die()
- Fix for event group validation in QCOM L2 PMU driver
- Fix requesting of PMU IRQs on AMD Seattle
- Minor cleanups and fixes"
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: mmu: Place guard page after mapping of kernel image
drivers/perf: arm_pmu: Request PMU SPIs with IRQF_PER_CPU
arm64: sysreg: Fix unprotected macro argmuent in write_sysreg
perf: qcom_l2: fix column exclusion check
arm64/lib: copy_page: use consistent prefetch stride
arm64/numa: Drop duplicate message
perf: Convert to using %pOF instead of full_name
arm64: Convert to using %pOF instead of full_name
arm64: traps: disable irq in die()
arm64: atomics: Remove '&' from '+&' asm constraint in lse atomics
arm64: uaccess: Remove redundant __force from addr cast in __range_ok
Merge tag 'powerpc-4.13-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull powerpc fixes from Michael Ellerman:
"The highlight is Ben's patch to work around a host killing bug when
running KVM guests with the Radix MMU on Power9. See the long change
log of that commit for more detail.
And then three fairly minor fixes:
- fix of_node_put() underflow during reconfig remove, using old DLPAR
tools.
- fix recently introduced ld version check with 64-bit LE-only
toolchain.
- free the subpage_prot_table correctly, avoiding a memory leak.
Thanks to: Aneesh Kumar K.V, Benjamin Herrenschmidt, Laurent Vivier"
* tag 'powerpc-4.13-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
powerpc/mm/hash: Free the subpage_prot_table correctly
powerpc/Makefile: Fix ld version check with 64-bit LE-only toolchain
powerpc/pseries: Fix of_node_put() underflow during reconfig remove
powerpc/mm/radix: Workaround prefetch issue with KVM
NFSv4.1: Fix a race where CB_NOTIFY_LOCK fails to wake a waiter
nfs4_retry_setlk() sets the task's state to TASK_INTERRUPTIBLE within the
same region protected by the wait_queue's lock after checking for a
notification from CB_NOTIFY_LOCK callback. However, after releasing that
lock, a wakeup for that task may race in before the call to
freezable_schedule_timeout_interruptible() and set TASK_WAKING, then
freezable_schedule_timeout_interruptible() will set the state back to
TASK_INTERRUPTIBLE before the task will sleep. The result is that the task
will sleep for the entire duration of the timeout.
Since we've already set TASK_INTERRUPTIBLE in the locked section, just use
freezable_schedule_timout() instead.
Fixes: be088ffc249b ("nfs: allow blocking locks to be awoken by lock callbacks") Signed-off-by: Benjamin Coddington <bcodding@redhat.com> Reviewed-by: Jeff Layton <jlayton@redhat.com> Cc: stable@vger.kernel.org # v4.9+ Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Merge branch 'for-4.13-part3' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fixes from David Sterba:
"Fixes addressing problems reported by users, and there's one more
regression fix"
* 'for-4.13-part3' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
btrfs: round down size diff when shrinking/growing device
Btrfs: fix early ENOSPC due to delalloc
btrfs: fix lockup in find_free_extent with read-only block groups
Btrfs: fix dir item validation when replaying xattr deletes
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md
Pull MD fixes from Shaohua Li:
"This fixes several bugs, three of them are marked for stable:
- an initialization issue fixed by Ming
- a bio clone race issue fixed by me
- an async tx flush issue fixed by Ofer
- other cleanups"
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md:
MD: fix warnning for UP case
md/raid5: add thread_group worker async_tx_issue_pending_all
md: simplify code with bio_io_error
md/raid1: fix writebehind bio clone
md: raid1-10: move raid1/raid10 common code into raid1-10.c
md: raid1/raid10: initialize bvec table via bio_add_page()
md: remove 'idx' from 'struct resync_pages'
Merge tag 'for-4.13/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
Pull device mapper fixes from Mike Snitzer:
- a few DM integrity fixes that improve performance. One that address
inefficiencies in the on-disk journal device layout. Another that
makes use of the block layer's on-stack plugging when writing the
journal.
- a dm-bufio fix for the blk_status_t conversion that went in during
the merge window.
- a few DM raid fixes that address correctness when suspending the
device and a validation fix for validation that occurs during device
activation.
- a couple DM zoned target fixes. Important one being the fix to not
use GFP_KERNEL in the IO path due to concerns about deadlock in
low-memory conditions (e.g. swap over a DM zoned device, etc).
- a DM DAX device fix to make sure dm_dax_flush() is called if the
underlying DAX device is operating as a write cache.
* tag 'for-4.13/dm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
dm, dax: Make sure dm_dax_flush() is called if device supports it
dm verity fec: fix GFP flags used with mempool_alloc()
dm zoned: use GFP_NOIO in I/O path
dm zoned: remove test for impossible REQ_OP_FLUSH conditions
dm raid: bump target version
dm raid: avoid mddev->suspended access
dm raid: fix activation check in validate_raid_redundancy()
dm raid: remove WARN_ON() in raid10_md_layout_to_format()
dm bufio: fix error code in dm_bufio_write_dirty_buffers()
dm integrity: test for corrupted disk format during table load
dm integrity: WARN_ON if variables representing journal usage get out of sync
dm integrity: use plugging when writing the journal
dm integrity: fix inefficient allocation of journal space
Merge branch 'for-linus' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe:
"A small collection of fixes that should go into this series. This
contains:
- NVMe pull request from Christoph, with various fixes for nvme
proper and nvme-fc.
- disable runtime PM for blk-mq for now.
With scsi now defaulting to using blk-mq, this reared its head as
an issue. Longer term we'll fix up runtime PM for blk-mq, for now
just disable it to prevent a hang on laptop resume for some folks.
- blk-mq CPU <-> hw queue map fix from Christoph.
- xen/blkfront pull request from Konrad, with two small fixes for the
blkfront driver.
- a few fixups for nbd from Joseph.
- a stable fix for pblk from Javier"
* 'for-linus' of git://git.kernel.dk/linux-block:
lightnvm: pblk: advance bio according to lba index
nvme: validate admin queue before unquiesce
nbd: clear disconnected on reconnect
nvme-pci: fix HMB size calculation
nvme-fc: revise TRADDR parsing
nvme-fc: address target disconnect race conditions in fcp io submit
nvme: fabrics commands should use the fctype field for data direction
nvme: also provide a UUID in the WWID sysfs attribute
xen/blkfront: always allocate grants first from per-queue persistent grants
xen-blkfront: fix mq start/stop race
blk-mq: map queues to all present CPUs
block: disable runtime-pm for blk-mq
xen-blkfront: Fix handling of non-supported operations
nbd: only set sndtimeo if we have a timeout set
nbd: take tx_lock before disconnecting
nbd: allow multiple disconnects to be sent
Merge tag 'mmc-v4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
Pull MMC fixes from Ulf Hansson:
"Here are a couple of mmc fixes intended for v4.13-rc1.
I have also included a couple of cleanup patches in this pull request
for OMAP2+, related to the omap_hsmmc driver. The reason is because of
the changes are also depending on OMAP SoC specific code, so this
simplifies how to deal with this.
Summary:
MMC host:
- sunxi: Correct time phase settings
- omap_hsmmc: Clean up some dead code
- dw_mmc: Fix message printed for deprecated num-slots DT binding
- dw_mmc: Fix DT documentation"
* tag 'mmc-v4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
Documentation: dw-mshc: deprecate num-slots
mmc: dw_mmc: fix the wrong condition check of getting num-slots from DT
mmc: host: omap_hsmmc: remove unused platform callbacks
ARM: OMAP2+: hsmmc.c: Remove dead code
mmc: sunxi: Keep default timing phase settings for new timing mode
Javier González [Fri, 28 Jul 2017 13:13:16 +0000 (15:13 +0200)]
lightnvm: pblk: advance bio according to lba index
When a lba either hits the cache or corresponds to an empty entry in the
L2P table, we need to advance the bio according to the position in which
the lba is located. Otherwise, we will copy data in the wrong page, thus
causing data corruption for the application.
In case of a cache hit, we assumed that bio->bi_iter.bi_idx would
contain the correct index, but this is no necessarily true. Instead, use
the local bio advance counter and iterator. This guarantees that lbas
hitting the cache are copied into the right bv_page.
In case of an empty L2P entry, we omitted to advance the bio. In the
cases when the same I/O also contains a cache hit, data corresponding
to this lba will be copied to the wrong bv_page. Fix this by advancing
the bio as we do in the case of a cache hit.
Will Deacon [Mon, 24 Jul 2017 10:46:09 +0000 (11:46 +0100)]
arm64: mmu: Place guard page after mapping of kernel image
The vast majority of virtual allocations in the vmalloc region are followed
by a guard page, which can help to avoid overruning on vma into another,
which may map a read-sensitive device.
This patch adds a guard page to the end of the kernel image mapping (i.e.
following the data/bss segments).
Cc: Mark Rutland <mark.rutland@arm.com> Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
x86/boot: Disable the address-of-packed-member compiler warning
The clang warning 'address-of-packed-member' is disabled for the general
kernel code, also disable it for the x86 boot code.
This suppresses a bunch of warnings like this when building with clang:
./arch/x86/include/asm/processor.h:535:30: warning: taking address of
packed member 'sp0' of class or structure 'x86_hw_tss' may result in an
unaligned pointer value [-Waddress-of-packed-member]
return this_cpu_read_stable(cpu_tss.x86_tss.sp0);
^~~~~~~~~~~~~~~~~~~
./arch/x86/include/asm/percpu.h:391:59: note: expanded from macro
'this_cpu_read_stable'
#define this_cpu_read_stable(var) percpu_stable_op("mov", var)
^~~
./arch/x86/include/asm/percpu.h:228:16: note: expanded from macro
'percpu_stable_op'
: "p" (&(var)));
^~~
Signed-off-by: Matthias Kaehlcke <mka@chromium.org> Cc: Doug Anderson <dianders@chromium.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20170725215053.135586-1-mka@chromium.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
Merge tag 'drm-fixes-for-v4.13-rc3' of git://people.freedesktop.org/~airlied/linux
Pull drm fixes from Dave Airlie:
"These iare the fixes for 4.13-rc3: vmwgfx, exynos, i915, amdgpu,
nouveau, host1x and displayport fixes.
As expected people woke up this week, i915 didn't do an -rc2 pull so
got a bumper -rc3 pull, and Ben resurfaced on nouveau and fixed a
bunch of major crashers seen on Fedora 26, and there are a few vmwgfx
fixes as well.
Otherwise exynos had some regression fixes/cleanups, and amdgpu has an
rcu locking regression fix and a couple of minor fixes"
* tag 'drm-fixes-for-v4.13-rc3' of git://people.freedesktop.org/~airlied/linux: (44 commits)
drm/i915: Fix bad comparison in skl_compute_plane_wm.
drm/i915: Force CPU synchronisation even if userspace requests ASYNC
drm/i915: Only skip updating execobject.offset after error
drm/i915: Only mark the execobject as pinned on success
drm/i915: Remove assertion from raw __i915_vma_unpin()
drm/i915/cnl: Fix loadgen select programming on ddi vswing sequence
drm/i915: Fix scaler init during CRTC HW state readout
drm/i915/selftests: Fix an error handling path in 'mock_gem_device()'
drm/i915: Unbreak gpu reset vs. modeset locking
gpu: host1x: Free the IOMMU domain when there is no device to attach
drm/i915: Fix cursor updates on some platforms
drm/i915: Fix user ptr check size in eb_relocate_vma()
drm: exynos: mark pm functions as __maybe_unused
drm/exynos: select CEC_CORE if CEC_NOTIFIER
drm/exynos/hdmi: fix disable sequence
drm/exynos: mic: add a bridge at probe
drm/exynos/dsi: Remove error handling for bridge_node DT parsing
drm/exynos: dsi: do not try to find bridge
drm: exynos: hdmi: make of_device_ids const.
drm: exynos: constify mixer_match_types and *_mxr_drv_data.
...
Dave Airlie [Fri, 28 Jul 2017 02:32:59 +0000 (12:32 +1000)]
Merge tag 'exynos-drm-fixes-for-v4.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos into drm-fixes
Summary:
- fix probing fail issue of dsi driver without bridge device.
- fix disable sequence of hdmi driver.
- trivial cleanups.
* tag 'exynos-drm-fixes-for-v4.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos:
drm: exynos: mark pm functions as __maybe_unused
drm/exynos: select CEC_CORE if CEC_NOTIFIER
drm/exynos/hdmi: fix disable sequence
drm/exynos: mic: add a bridge at probe
drm/exynos/dsi: Remove error handling for bridge_node DT parsing
drm/exynos: dsi: do not try to find bridge
drm: exynos: hdmi: make of_device_ids const.
drm: exynos: constify mixer_match_types and *_mxr_drv_data.
exynos_drm: Clean up duplicated assignment in exynos_drm_driver
Dave Airlie [Fri, 28 Jul 2017 00:19:08 +0000 (10:19 +1000)]
Merge tag 'drm-intel-fixes-2017-07-27' of git://anongit.freedesktop.org/git/drm-intel into drm-fixes
i915 fixes for -rc3
Bit more than usual since we missed -rc2. 4x cc: stable, 2 gvt
patches, but all fairly minor stuff. Last minute rebase was to add a
few missing cc: stable, I did prep the pull this morning already and
made sure CI approves.
* tag 'drm-intel-fixes-2017-07-27' of git://anongit.freedesktop.org/git/drm-intel:
drm/i915: Fix bad comparison in skl_compute_plane_wm.
drm/i915: Force CPU synchronisation even if userspace requests ASYNC
drm/i915: Only skip updating execobject.offset after error
drm/i915: Only mark the execobject as pinned on success
drm/i915: Remove assertion from raw __i915_vma_unpin()
drm/i915/cnl: Fix loadgen select programming on ddi vswing sequence
drm/i915: Fix scaler init during CRTC HW state readout
drm/i915/selftests: Fix an error handling path in 'mock_gem_device()'
drm/i915: Unbreak gpu reset vs. modeset locking
drm/i915: Fix cursor updates on some platforms
drm/i915: Fix user ptr check size in eb_relocate_vma()
drm/i915/gvt: Extend KBL platform support in GVT-g
drm/i915/gvt: Fix the vblank timer close issue after shutdown VMs in reverse
Dave Airlie [Fri, 28 Jul 2017 00:14:08 +0000 (10:14 +1000)]
Merge tag 'drm-misc-fixes-2017-07-27' of git://anongit.freedesktop.org/git/drm-misc into drm-fixes
Core Changes:
- dp: A few fixes in drm_dp_downstream_debug() (Chris)
- rockchip: sanitize the Kconfig dependencies (fallout from EXTCON) (Arnd)
- host1x: Free the iommu domain when attach_device fails (Paul)
Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Paul Kocialkowski <contact@paulk.fr>
* tag 'drm-misc-fixes-2017-07-27' of git://anongit.freedesktop.org/git/drm-misc:
gpu: host1x: Free the IOMMU domain when there is no device to attach
drm/rockchip: fix Kconfig dependencies
drm/dp: Don't trust drm_dp_downstream_id()
drm/dp: Fix read pointer for drm_dp_downsteam_debug()
Merge tag 'acpi-4.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Pull ACPI fixes from Rafael Wysocki:
"These are two fixups for the suspend-to-idle handling in the ACPI
subsystem after recent changes in that area and two simple fixes of
the ACPI NUMA code.
Specifics:
- Add an ACPI module parameter to allow users to override the new
default behavior on some systems where the EC GPE is not disabled
during suspend-to-idle in case the EC on their systems generates
excessive wakeup events and they want to sacrifice some
functionality (like power button wakeups) for extra battery life
while suspended (Rafael Wysocki).
- Fix flushing of the outstanding EC work in the ACPI core
suspend-to-idle code (Rafael Wysocki).
- Add a missing include and fix a messed-up comment in the ACPI NUMA
code (Ross Zwisler)"
* tag 'acpi-4.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
ACPI: NUMA: Fix typo in the full name of SRAT
ACPI: NUMA: add missing include in acpi_numa.h
ACPI / PM / EC: Flush all EC work in acpi_freeze_sync()
ACPI / EC: Add parameter to force disable the GPE on suspend
Chris Wilson [Fri, 21 Jul 2017 14:50:37 +0000 (15:50 +0100)]
drm/i915: Force CPU synchronisation even if userspace requests ASYNC
The goal here was to minimise doing any thing or any check inside the
kernel that was not strictly required. For a userspace that assumes
complete control over the cache domains, the kernel is usually using
outdated information and may trigger clflushes where none were
required.
However, swapping is a situation where userspace has no knowledge of the
domain transfer, and will leave the object in the CPU cache. The kernel
must flush this out to the backing storage prior to use with the GPU. As
we use an asynchronous task tracked by an implicit fence for this, we
also need to cancel the ASYNC flag on the object so that the object will
wait for the clflush to complete before being executed. This also absolves
userspace of the responsibility imposed by commit ab275309d4d9 ("drm/i915:
Enable userspace to opt-out of implicit fencing") that its needed to ensure
that the object was out of the CPU cache prior to use on the GPU.
Fixes: ab275309d4d9 ("drm/i915: Enable userspace to opt-out of implicit fencing")
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=101571 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Jason Ekstrand <jason@jlekstrand.net> Reviewed-by: Jason Ekstrand <jason@jlekstrand.net> Link: https://patchwork.freedesktop.org/patch/msgid/20170721145037.25105-5-chris@chris-wilson.co.uk Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit 0f46daa1a273779a0b73d768a788ca3f04238f9c) Cc: stable@vger.kernel.org Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Chris Wilson [Fri, 21 Jul 2017 14:50:36 +0000 (15:50 +0100)]
drm/i915: Only skip updating execobject.offset after error
I was being overly paranoid in not updating the execobject.offset after
performing the fallback copy where we set reloc.presumed_offset to -1.
The thinking was to ensure that a subsequent NORELOC execbuf would be
forced to process the invalid relocations. However this is overkill so
long as we *only* update the execobject.offset following a successful
update of the relocation value witin the batch. If we have to repeat the
execbuf due to a later interruption, then we may skip the relocations on
the second pass (honouring NORELOC) since the execobject.offset match
the actual offsets (even though reloc.presumed_offset is garbage).
Subsequent calls to execbuf with NORELOC should themselves ensure that
the reloc.presumed_offset have been corrected in case of future
migration.
Reporting back the actual execobject.offset, even when
reloc.presumed_offset is garbage, ensures that reuse of those objects
use the latest information to avoid relocations.
Fixes: a3260046f7bb ("drm/i915: Eliminate lots of iterations over the execobjects array")
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=101635 Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20170721145037.25105-4-chris@chris-wilson.co.uk Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit 1f727d9e725a408ef58d159c20fb2e51818ff153) Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Chris Wilson [Fri, 21 Jul 2017 14:50:35 +0000 (15:50 +0100)]
drm/i915: Only mark the execobject as pinned on success
If we fail to acquire a fence (for old school fenced GPU access) then we
unwind the vma reservation, including its pin. However, we were making
the execobject as holding the pin before erring out, leading to a double
unpin:
Reported-by: Tomi Sarvela <tomi.p.sarvela@intel.com> Fixes: a3260046f7bb ("drm/i915: Eliminate lots of iterations over the execobjects array") Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20170721145037.25105-3-chris@chris-wilson.co.uk Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit 1da7b54c46bcfe5484af0b27d8c9003b238031b0) Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Chris Wilson [Fri, 21 Jul 2017 14:50:34 +0000 (15:50 +0100)]
drm/i915: Remove assertion from raw __i915_vma_unpin()
After we detect a i915_vma pin overflow, we call __i915_vma_unpin to
cleanup. However, on an overflow the pin_count bitfield will be zero,
triggering an assertion, even though we the intention is to merely warn
and report the error back to the user (as historically the culprit has
be a leak in the display code).
Fixes: 887aec7f0a58 ("drm/i915: Wrap vma->pin_count accessors with small inline helpers") Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20170721145037.25105-2-chris@chris-wilson.co.uk Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit 67fddd902b8e37b15a905c287ce4e40f52a564af) Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
drm/i915/cnl: Fix loadgen select programming on ddi vswing sequence
The condition for setting the Loadgen Select bit of
PORT_TX_DW4 register during DDI Vswing Sequence should be
Bit rate <=6 GHz whereas the existing code checks only
Bit Rate < 6GHz. This patch fixes this condition.
While at it also remove the redundant paranthesis.
Fixes: 905377cc18d9 ("drm/i915/cnl: Implement voltage swing sequence.") Cc: Paulo Zanoni <paulo.r.zanoni@intel.com> Cc: Rodrigo Vivi <rodrigo.vivi@intel.com> Signed-off-by: Manasi Navare <manasi.d.navare@intel.com> Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com> Signed-off-by: Paulo Zanoni <paulo.r.zanoni@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/1500329122-32662-1-git-send-email-manasi.d.navare@intel.com Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit a8e45a1c42d11597e975f3e5f2fe182f90cdaa7f) Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Imre Deak [Thu, 20 Jul 2017 11:28:20 +0000 (14:28 +0300)]
drm/i915: Fix scaler init during CRTC HW state readout
The scaler allocation code depends on a non-zero default value for the
crtc scaler_id, so make sure we initialize the scaler state accordingly
even if the crtc is off. This fixes at least an initial YUV420 modeset
(added in a follow-up patchset by Shashank) when booting with the screen
off: after the initial HW readout and modeset which enables the scaler a
subsequent modeset will disable the scaler which isn't properly
allocated. This results in a funky HW state where the pipe scaler HW
registers can't be modified and the normally black screen is grey and
shifted to the right or jitters.
The problem was revealed by Shashank's YUV420 patchset and first
reported by Ville.
v2:
- In the stable tag also include versions which need backporting (Jani)
Cc: Jani Nikula <jani.nikula@intel.com> Cc: Shashank Sharma <shashank.sharma@intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Cc: Chandra Konduru <chandra.konduru@intel.com> Cc: Matt Roper <matthew.d.roper@intel.com> Cc: <stable@vger.kernel.org> # 4.2.x Reported-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Fixes: 80c830e9bcd6 ("drm/i915: skylake panel fitting using shared scalers") Signed-off-by: Imre Deak <imre.deak@intel.com> Reviewed-by: Mahesh Kumar <mahesh1.kumar@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20170720112820.26816-1-imre.deak@intel.com Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
(cherry picked from commit 5fb9dadf336f3590c799e8cbde348215dccc2aa2) Cc: stable@vger.kernel.org Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Daniel Vetter [Wed, 19 Jul 2017 12:54:55 +0000 (14:54 +0200)]
drm/i915: Unbreak gpu reset vs. modeset locking
Taking the modeset locks unconditionally isn't the greatest idea,
because atm that part is still broken and times out (and then atomic
keels over). And there's really no reason to do so, the old code
didn't do that either.
To make the patch a bit simpler let's also nuke 2 cases that are only
around for the old mmioflip paths. Atomic nonblocking workers will not
die (minus bugs) when a gpu reset happens.
And of course this doesn't fix any of the gpu reset vs. modeset
deadlock fun, but it at least stop modern CI machines from keeling
over all over the place for no reason at all.
And we still have the explicit testcases to run the fake gpu reset, so
coverage isn't that much worse.
v2: Split out additional changes on top, restrict this to purely reducing
the critical section of modeset locks.
v2: Review from Maarten
- update comments
- don't oops when state is NULL in intel_finish_reset, but try to at
least still drop locks properly. The hw is going to be toast anyway.
Fixes: 9e8c32c24b8f ("drm/i915: Fix modeset handling during gpu reset, v5.") Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20170719125502.25696-3-daniel.vetter@ffwll.ch
(cherry picked from commit ce87ea15ebc60a9f8f156b2549f7b2cf7fe48d04) Cc: stable@vger.kernel.org Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Merge branch 'parisc-4.13-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull parisc fixes from Helge Deller:
- The majority of lines changed are due to regenerated defconfig files.
- The support for the Page Deallocation Table (PDT) which was merged in
the merge window for 4.13 contained a bug which crashes the kernel if
a bad page is reported by firmware. This is now fixed and the kernel
messages will show which memory slot holds the broken DIMM.
- Commit 54f78448f334 ("kbuild: handle libs-y archives separately from
built-in.o archives") broke linking the parisc kernel due to
millicode symbols which can't be reached then any longer. This was
fixed by modifying the parisc vmlinux.lds linker script.
- If the stack checker panics on stack overflow, avoid recursive
panics.
- Some parisc machines can't physically power off and thus instead
start after some time to flood the console by presumably detected
soft lockups. Avoid this by disabling the lockup detectors before
entering the endless for-next loop.
- Dave Anglin provided fixes which prevents TLB speculation on flushed
pages on PA8800/PA9000 CPUs.
- Arvind Yadav sent a trivial patch to constify the attribute_group
structure in our firmware on-board-flash storage driver
(pdc_stable.c)
* 'parisc-4.13-3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
parisc: Extend disabled preemption in copy_user_page
parisc: Prevent TLB speculation on flushed pages on CPUs that only support equivalent aliases
parisc: Suspend lockup detectors before system halt
parisc: Show DIMM slot number which holds broken memory module
parisc: Add function to return DIMM slot of physical address
parisc: Fix crash when calling PDC_PAT_MEM PDT firmware function
parisc: regenerate defconfig files
parisc: pdc_stable: constify attribute_group structures.
parisc: Merge millicode routines via linker script
parisc: Disable further stack checks when panic occurs during stack check
xen: dont fiddle with event channel masking in suspend/resume
Instead of fiddling with masking the event channels during suspend
and resume handling let do the irq subsystem do its job. It will do
the mask and unmask operations as needed.
Signed-off-by: Juergen Gross <jgross@suse.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Tested-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: Juergen Gross <jgross@suse.com>
xen: selfballoon: remove unnecessary static in frontswap_selfshrink()
Remove unnecessary static on local variables last_frontswap_pages and
tgt_frontswap_pages. Such variables are initialized before being used,
on every execution path throughout the function. The statics have no
benefit and, removing them reduce the code size.
This issue was detected using Coccinelle and the following semantic patch:
@bad exists@
position p;
identifier x;
type T;
@@
static T x@p;
...
x = <+...x...+>
@@
identifier x;
expression e;
type T;
position p != bad.p;
@@
-static
T x@p;
... when != x
when strict
?x = e;
You can see a significant difference in the code size after executing
the size command, before and after the code change:
before:
text data bss dec hex filename
5633 3452 384 9469 24fd drivers/xen/xen-selfballoon.o
after:
text data bss dec hex filename
5576 3308 256 9140 23b4 drivers/xen/xen-selfballoon.o
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com> Reviewed-by: Juergen Gross <jgross@suse.com> Signed-off-by: Juergen Gross <jgross@suse.com>
Merge tag 'sound-4.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"This is a pretty boring pull request, containing a few HD-audio quirks
and ID updates as usual suspects, as well as a fix for a regression of
FM801 chip on ia64 (what a legacy combination!)"
* tag 'sound-4.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: hda - Add mute led support for HP ProBook 440 G4
ALSA: hda/realtek - No loopback on ALC225/ALC295 codec
ALSA: hda/realtek - Update headset mode for ALC225
ALSA: fm801: Initialize chip after IRQ handler is registered
ALSA: hda/realtek - Update headset mode for ALC298
ALSA: hda - Add missing NVIDIA GPU codec IDs to patch table
Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm
Pull ARM fixes from Russell King:
"Two areas addressed by these fixes:
- Fixes from Dave Martin for the signal frames that were broken with
certain configurations. No one noticed until recently.
- More kexec fixes to ensure that the crashkernel region is correctly
allocated, and a fix for the location of the device tree when
several kexec kernels are loaded"
* 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
ARM: 8687/1: signal: Fix unparseable iwmmxt_sigframe in uc_regspace[]
ARM: 8686/1: iwmmxt: Add missing __user annotations to sigframe accessors
ARM: kexec: fix failure to boot crash kernel
ARM: kexec: avoid allocating crashkernel region outside lowmem
NFS: Optimize fallocate by refreshing mapping when needed.
posix_fallocate() will allocate space in an NFS file by considering
the last byte of every 4K block. If it is before EOF, it will read
the byte and if it is zero, a zero is written out. If it is after EOF,
the zero is unconditionally written.
For the blocks beyond EOF, if NFS believes its cache is valid, it will
expand these writes to write full pages, and then will merge the pages.
This results if (typically) 1MB writes. If NFS believes its cache is
not valid (particularly if NFS_INO_INVALID_DATA or
NFS_INO_REVAL_PAGECACHE are set - see nfs_write_pageuptodate()), it will
send the individual 1-byte writes. This results in (typically) 256 times
as many RPC requests, and can be substantially slower.
Currently nfs_revalidate_mapping() is only used when reading a file or
mmapping a file, as these are times when the content needs to be
up-to-date. Writes don't generally need the cache to be up-to-date, but
writes beyond EOF can benefit, particularly in the posix_fallocate()
case.
So this patch calls nfs_revalidate_mapping() when writing beyond EOF -
i.e. when there is a gap between the end of the file and the start of
the write. If the cache is thought to be out of date (as happens after
taking a file lock), this will cause a GETATTR, and the two flags
mentioned above will be cleared. With this, posix_fallocate() on a
newly locked file does not generate excessive tiny writes.
Signed-off-by: NeilBrown <neilb@suse.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Prior to commit 4130998608c5 ("NFS: Cache aggressively when file is open
for writing"), NFS would revalidate, or invalidate, the file size when
taking a lock. Since that commit it only invalidates the file content.
If the file size is changed on the server while wait for the lock, the
client will have an incorrect understanding of the file size and could
corrupt data. This particularly happens when writing beyond the
(supposed) end of file and can be easily be demonstrated with
posix_fallocate().
If an application opens an empty file, waits for a write lock, and then
calls posix_fallocate(), glibc will determine that the underlying
filesystem doesn't support fallocate (assuming version 4.1 or earlier)
and will write out a '0' byte at the end of each 4K page in the region
being fallocated that is after the end of the file.
NFS will (usually) detect that these writes are beyond EOF and will
expand them to cover the whole page, and then will merge the pages.
Consequently, NFS will write out large blocks of zeroes beyond where it
thought EOF was. If EOF had moved, the pre-existing part of the file
will be over-written. Locking should have protected against this,
but it doesn't.
This patch restores the use of nfs_zap_caches() which invalidated the
cached attributes. When posix_fallocate() asks for the file size, the
request will go to the server and get a correct answer.
cc: stable@vger.kernel.org (v4.8+) Fixes: 4130998608c5 ("NFS: Cache aggressively when file is open for writing") Signed-off-by: NeilBrown <neilb@suse.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
gpu: host1x: Free the IOMMU domain when there is no device to attach
When there is no device to attach to the IOMMU domain, as may be the
case when the device-tree does not contain the proper iommu node, it is
best to keep going without IOMMU support rather than failing.
This allows the driver to probe and function instead of taking down
all of the tegra drm driver, leading to missing display support.
Shawn Lin [Tue, 18 Jul 2017 08:31:38 +0000 (16:31 +0800)]
Documentation: dw-mshc: deprecate num-slots
dwmmc host driver already deprecate it in the driver
but didn't modify the documentation to reflect the fact.
This patch deprecates it and clean up num-slots from the
examples of all variant host drivers.
Signed-off-by: Shawn Lin <shawn.lin@rock-chips.com> Acked-by: Jaehoon Chung <jh80.chung@samsung.com> Acked-by: Rob Herring <robh@kernel.org> Fixes: 4d96f94879d1 ("mmc: dw_mmc: deprecated the "num-slots" property") Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Thomas Gleixner [Thu, 27 Jul 2017 10:21:11 +0000 (12:21 +0200)]
genirq/cpuhotplug: Revert "Set force affinity flag on hotplug migration"
That commit was part of the changes moving x86 to the generic CPU hotplug
interrupt migration code. The force flag was required on x86 before the
hierarchical irqdomain rework, but invoking set_affinity() with force=true
stayed and had no side effects.
At some point in the past, the force flag got repurposed to support the
exynos timer interrupt affinity setting to a not yet online CPU, so the
interrupt controller callback does not verify the supplied affinity mask
against cpu_online_mask.
Setting the flag in the CPU hotplug code causes the cpu online masking to
be blocked on these irq controllers and results in potentially affining an
interrupt to the CPU which is unplugged, i.e. instead of moving it away,
it's just reassigned to it.
As the force flags is not longer needed on x86, it's safe to revert that
patch so the ARM irqchips which use the force flag work again.
Add comments to that effect, so this won't happen again.
Note: The online mask handling should be done in the generic code and the
force flag and the masking in the irq chips removed all together, but
that's not a change possible for 4.13.
Fixes: 3203694a030a ("genirq/cpuhotplug: Set force affinity flag on hotplug migration") Reported-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Will Deacon <will.deacon@arm.com> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: LAK <linux-arm-kernel@lists.infradead.org> Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1707271217590.3109@nanos Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Will Deacon [Tue, 25 Jul 2017 15:30:34 +0000 (16:30 +0100)]
drivers/perf: arm_pmu: Request PMU SPIs with IRQF_PER_CPU
Since the PMU register interface is banked per CPU, CPU PMU interrrupts
cannot be handled by a CPU other than the one with the PMU asserting the
interrupt. This means that migrating PMU SPIs, as we do during a CPU
hotplug operation doesn't make any sense and can lead to the IRQ being
disabled entirely if we route a spurious IRQ to the new affinity target.
This has been observed in practice on AMD Seattle, where CPUs on the
non-boot cluster appear to take a spurious PMU IRQ when coming online,
which is routed to CPU0 where it cannot be handled.
This patch passes IRQF_PERCPU for PMU SPIs and forcefully sets their
affinity prior to requesting them, ensuring that they cannot
be migrated during hotplug events. This interacts badly with the DB8500
erratum workaround that ping-pongs the interrupt affinity from the handler,
so we avoid passing IRQF_PERCPU in that case by allowing the IRQ flags
to be overridden in the platdata.
Fixes: a2b1984a9f90 ("drivers/perf: arm_pmu: move irq request/free into probe") Cc: Mark Rutland <mark.rutland@arm.com> Cc: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
Ville Syrjälä [Fri, 14 Jul 2017 15:52:27 +0000 (18:52 +0300)]
drm/i915: Fix cursor updates on some platforms
Turns out that just writing CURPOS isn't sufficient to move the cursor
on some platforms. My 830 works just fine, but eg. 945 and PNV don't.
On those platforms we need to arm even the CURPOS update with a
CURBASE write.
Even worse, a write to any of the cursor register apart from CURBASE
will cancel an already pending cursor update. So if we have armed a
CURCNTR/CURBASE update, a subsequent CURPOS write prior to vblank
would cancel that armed update. Thus we're left with a cursor that
doesn't appear to move, or even change shape.
Fix the problem by always performing the CURBASE write after a
CURPOS write. Bspec is somewhat unclear which platforms actually
require this CURBASE write and which don't. So to keep it simple
and to make sure we really fix the problem across all supported
devices, let's just perform the CURBASE write unconditionally.
Cc: Paul Menzel <pmenzel@molgen.mpg.de>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=101790 Fixes: 9e9385322858 ("drm/i915: Drop useless posting reads from cursor commit") Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Tested-by: Paul Menzel <paulepanter@users.sourceforge.net> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/20170714155227.6089-1-ville.syrjala@linux.intel.com
(cherry picked from commit 8753d2bc5e49daad301ce65f5dada57ed924fad6) Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Imre Deak [Fri, 14 Jul 2017 15:12:42 +0000 (18:12 +0300)]
drm/i915: Fix user ptr check size in eb_relocate_vma()
Fix the sizeof(ptr) vs. sizeof(*ptr) typo.
Fixes: a3260046f7bb ("drm/i915: Eliminate lots of iterations over the execobjects array") Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com> Signed-off-by: Imre Deak <imre.deak@intel.com> Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Link: http://patchwork.freedesktop.org/patch/msgid/20170714151242.517-2-imre.deak@intel.com
(cherry picked from commit edd9003f7f9dddd28fdd768e6e7569d996c769cb) Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
powerpc/mm/hash: Free the subpage_prot_table correctly
Fixes: 59fb1066cd63f ("powerpc: subpage_protect: Increase the array size to take care of 64TB") Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Tested-by: Ram Pai <linuxram@us.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
The rework of the exynos DRM clock handling introduced
warnings for configurations that have CONFIG_PM disabled:
drivers/gpu/drm/exynos/exynos_hdmi.c:736:13: error: 'hdmi_clk_disable_gates' defined but not used [-Werror=unused-function]
static void hdmi_clk_disable_gates(struct hdmi_context *hdata)
^~~~~~~~~~~~~~~~~~~~~~
drivers/gpu/drm/exynos/exynos_hdmi.c:717:12: error: 'hdmi_clk_enable_gates' defined but not used [-Werror=unused-function]
static int hdmi_clk_enable_gates(struct hdmi_context *hdata)
The problem is that the PM functions themselves are inside of
an #ifdef, but some functions they call are not.
This patch removes the #ifdef and instead marks the PM functions
as __maybe_unused, which is a more reliable way to get it right.
Hans Verkuil [Mon, 17 Jul 2017 11:48:14 +0000 (13:48 +0200)]
drm/exynos: select CEC_CORE if CEC_NOTIFIER
If the s5p-cec driver is a module and the drm exynos driver is built-in, then
the CEC core will be a module also, causing the CEC notifier to fail (will be
compiled as empty functions).
To prevent this select CEC_CORE if CEC_NOTIFIER is set to ensure the CEC core
is also built into the kernel.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Inki Dae <inki.dae@samsung.com>
Andrzej Hajda [Wed, 12 Jul 2017 10:01:23 +0000 (12:01 +0200)]
drm/exynos/hdmi: fix disable sequence
The "Fixes" patch was incorrectly merged, as a result PHY is prematurely
powered off and for example Odroid-U3 cannot disable TV power domain
when HDMI cable is unplugged.
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com> Reported-by: Marek Szyprowski <m.szyprowski@samsung.com> Fixes: 8063a177 ("drm/exynos/hdmi: fix pipeline disable order") Tested-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Inki Dae <inki.dae@samsung.com>
Hoegeun Kwon [Wed, 21 Jun 2017 10:51:43 +0000 (19:51 +0900)]
drm/exynos/dsi: Remove error handling for bridge_node DT parsing
Remove the error handling of bridge_node because the bridge_node is
optional.
For example, In case of Exynos SoC, a bridge device such as mDNIe and
MIC could be placed between Display Controller and MIPI DSI device but
the bridge device is optional.
Arvind Yadav [Mon, 19 Jun 2017 09:24:03 +0000 (14:54 +0530)]
drm: exynos: hdmi: make of_device_ids const.
of_device_ids are not supposed to change at runtime. All functions
working with of_device_ids provided by <linux/of.h> work with const
of_device_ids. So mark the non-const structs as const.
File size before:
text data bss dec hex filename
12294 1192 0 13486 34ae drivers/gpu/drm/exynos/exynos_hdmi.o
File size after constify hdmi_match_types.
text data bss dec hex filename
13318 176 0 13494 34b6 drivers/gpu/drm/exynos/exynos_hdmi.o
Dave Airlie [Wed, 26 Jul 2017 22:49:48 +0000 (08:49 +1000)]
Merge branch 'drm-fixes-4.13' of git://people.freedesktop.org/~agd5f/linux into drm-fixes
Three misc amd fixes.
* 'drm-fixes-4.13' of git://people.freedesktop.org/~agd5f/linux:
drm/amd/powerplay: fix AVFS voltage offset for Vega10
drm/amdgpu/gfx9: simplify and fix GRBM index selection
drm/amdgpu: Fix blocking in RCU critical section(v2)
Anna Schumaker [Tue, 25 Jul 2017 20:10:47 +0000 (16:10 -0400)]
NFS: Use raw NFS access mask in nfs4_opendata_access()
Commit f37978e264e5 ("NFS: Store the raw NFS access mask in the inode's
access cache") changed how the access results are stored after an
access() call. An NFS v4 OPEN might have access bits returned with the
opendata, so we should use the NFS4_ACCESS values when determining the
return value in nfs4_opendata_access().
Fixes: f37978e264e5 ("NFS: Store the raw NFS access mask in the inode's
access cache") Reported-by: Eryu Guan <eguan@redhat.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Tested-by: Takashi Iwai <tiwai@suse.de>
dm, dax: Make sure dm_dax_flush() is called if device supports it
Currently dm_dax_flush() is not being called, even if underlying dax
device supports write cache, because DAXDEV_WRITE_CACHE is not being
propagated up to the DM dax device.
If the underlying dax device supports write cache, set
DAXDEV_WRITE_CACHE on the DM dax device. This will cause dm_dax_flush()
to be called.
Fixes: 6cfb8e32cb ("dm: add ->flush() dax operation support") Signed-off-by: Vivek Goyal <vgoyal@redhat.com> Acked-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
dm verity fec: fix GFP flags used with mempool_alloc()
mempool_alloc() cannot fail for GFP_NOIO allocation, so there is no
point testing for failure.
One place the code tested for failure was passing "0" as the GFP
flags. This is most unusual and is probably meant to be GFP_NOIO,
so that is changed.
Also, allocation from ->extra_pool and ->prealloc_pool are repeated
before releasing the previous allocation. This can deadlock if the code
is servicing a write under high memory pressure. To avoid deadlocks,
change these to use GFP_NOWAIT and leave the error handling in place.
Signed-off-by: NeilBrown <neilb@suse.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost
Pull virtio fixes and cleanups from Michael Tsirkin:
"Fixes some minor issues all over the codebase"
* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
virtio-net: fix module unloading
virtio-balloon: coding format cleanup
virtio-balloon: deflate via a page list
virtio_blk: Use sysfs_match_string() helper
This patch fixes it by making the caller of cancel_hv_timer, start_hv_timer
and start_sw_timer be in preemption-disabled regions, which trivially
avoid any reentrancy issue with preempt notifier.
Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Radim Krčmář <rkrcmar@redhat.com> Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com>
[Add more WARNs. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Wanpeng Li [Tue, 25 Jul 2017 10:40:46 +0000 (03:40 -0700)]
KVM: nVMX: Fix loss of L2's NMI blocking state
Run kvm-unit-tests/eventinj.flat in L1 w/ ept=0 on both L0 and L1:
Before NMI IRET test
Sending NMI to self
NMI isr running stack 0x461000
Sending nested NMI to self
After nested NMI to self
Nested NMI isr running rip=40038e
After iret
After NMI to self
FAIL: NMI
Commit d5fc5efc611050 (KVM: nVMX: track NMI blocking state separately
for each VMCS) tracks NMI blocking state separately for vmcs01 and
vmcs02. However it is not enough:
- The L2 (kvm-unit-tests/eventinj.flat) generates NMI that will fault
on IRET, so the L2 can generate #PF which can be intercepted by L0.
- L0 walks L1's guest page table and sees the mapping is invalid, it
resumes the L1 guest and injects the #PF into L1. At this point the
vmcs02 has nmi_known_unmasked=true.
- L1 sets set bit 3 (blocking by NMI) in the interruptibility-state field
of vmcs12 (and fixes the shadow page table) before resuming L2 guest.
- L1 executes VMRESUME to resume L2, causing a vmexit to L0
- during VMRESUME emulation, prepare_vmcs02 sets bit 3 in the
interruptibility-state field of vmcs02, but nmi_known_unmasked is
still true.
- L2 immediately exits to L0 with another page fault, because L0 still has
not updated the NGVA->HPA page tables. However, nmi_known_unmasked is
true so vmx_recover_nmi_blocking does not do anything.
The fix is to update nmi_known_unmasked when preparing vmcs02 from vmcs12.
Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Radim Krčmář <rkrcmar@redhat.com> Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Wincy Van [Fri, 28 Apr 2017 05:13:59 +0000 (13:13 +0800)]
KVM: nVMX: Fix posted intr delivery when vcpu is in guest mode
The PI vector for L0 and L1 must be different. If dest vcpu0
is in guest mode while vcpu1 is delivering a non-nested PI to
vcpu0, there wont't be any vmexit so that the non-nested interrupt
will be delayed.
Signed-off-by: Wincy Van <fanwenyi0529@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Wincy Van [Fri, 28 Apr 2017 05:13:58 +0000 (13:13 +0800)]
x86: irq: Define a global vector for nested posted interrupts
We are using the same vector for nested/non-nested posted
interrupts delivery, this may cause interrupts latency in
L1 since we can't kick the L2 vcpu out of vmx-nonroot mode.
This patch introduces a new vector which is only for nested
posted interrupts to solve the problems above.
Signed-off-by: Wincy Van <fanwenyi0529@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The VM is running in 32-bit PAE mode, and Table 4-7 of the Intel manual
says:
Table 4-7. Use of CR3 with PAE Paging
Bit Position(s) Contents
4:0 Ignored
31:5 Physical address of the 32-Byte aligned
page-directory-pointer table used for linear-address
translation
63:32 Ignored (these bits exist only on processors supporting
the Intel-64 architecture)
To placate the static checker, write the mask explicitly as an
unsigned long constant instead of using a 32-bit unsigned constant.
Cc: Dan Carpenter <dan.carpenter@oracle.com> Fixes: d84414be5349ec0a07a65c995f76ca1068314766 Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
KVM: make pid available for uevents without debugfs
Simplify and improve the code so that the PID is always available in
the uevent even when debugfs is not available.
This adds a userspace_pid field to struct kvm, as per Radim's
suggestion, so that the PID can be retrieved on destruction too.
Acked-by: Janosch Frank <frankja@linux.vnet.ibm.com> Fixes: 700f2f096a7020 ("KVM: trigger uevents when creating or destroying a VM") Signed-off-by: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Scott Bauer [Tue, 25 Jul 2017 16:27:06 +0000 (10:27 -0600)]
nvme: validate admin queue before unquiesce
With a misbehaving controller it's possible we'll never
enter the live state and create an admin queue. When we
fail out of reset work it's possible we failed out early
enough without setting up the admin queue. We tear down
queues after a failed reset, but needed to do some more
sanitization.
Fixes 131841ba1cbd: "nvme: host: unquiesce queue in nvme_kill_queues()"
Just like in the allocator we must avoid touching multiple AGs out of
order when freeing blocks, as freeing still locks the AGF and can cause
the same AB-BA deadlocks as in the allocation path.
Signed-off-by: Christoph Hellwig <hch@lst.de> Reported-by: Nikolay Borisov <n.borisov.lkml@gmail.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Dave Martin [Tue, 25 Jul 2017 11:52:41 +0000 (12:52 +0100)]
arm64: sysreg: Fix unprotected macro argmuent in write_sysreg
write_sysreg() may misparse the value argument because it is used
without parentheses to protect it.
This patch adds the ( ) in order to avoid any surprises.
Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Dave Martin <Dave.Martin@arm.com>
[will: same change to write_sysreg_s] Signed-off-by: Will Deacon <will.deacon@arm.com>
Neil Leeder [Mon, 24 Jul 2017 21:17:02 +0000 (17:17 -0400)]
perf: qcom_l2: fix column exclusion check
The check for column exclusion did not verify that the event being
checked was an L2 event, and not a software event.
Software events should not be checked for column exclusion.
This resulted in a group with both software and L2 events sometimes
incorrectly rejecting the L2 event for column exclusion and
not counting it.
Add a check for PMU type before applying column exclusion logic.
Fixes: 25b82404a07a0eb1 ("perf: add qcom l2 cache perf events driver") Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Neil Leeder <nleeder@codeaurora.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
Michael Ellerman [Wed, 26 Jul 2017 05:00:42 +0000 (15:00 +1000)]
powerpc/Makefile: Fix ld version check with 64-bit LE-only toolchain
In commit 0d463439ce10 ("powerpc/64: Linker on-demand sfpr functions
for modules"), we added an ld version check early in the powerpc
top-level Makefile.
Because the Makefile runs before the kernel config is setup, the
checks for CONFIG_CPU_LITTLE_ENDIAN etc. all take the default case. So
we end up configuring ld for 32-bit big endian.
That would be OK, except that for historical (or perhaps no) reason,
we use 'override LD' to add the endian flags to the LD variable
itself, rather than the normal approach of adding them to LDFLAGS.
The end result is that when we check the ld version we run it as:
$(CROSS_COMPILE)ld -EB -m elf32ppc --version
This often works, unless you are using a 64-bit only and/or little
endian only, toolchain. In which case you see something like:
The proper fix is to stop using 'override LD', but that will require a
fair bit of testing. Instead we can fix it for now just by reordering
the Makefile to do the version check earlier.
Fixes: 0d463439ce10 ("powerpc/64: Linker on-demand sfpr functions for modules") Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
powerpc/pseries: Fix of_node_put() underflow during reconfig remove
As for commit 5c593fbd42f4 ("powerpc/pseries: Fix of_node_put()
underflow during DLPAR remove"), the call to of_node_put() must be
removed from pSeries_reconfig_remove_node().
dlpar_detach_node() and pSeries_reconfig_remove_node() both call
of_detach_node(), and thus the node should not be released in both
cases.
powerpc/mm/radix: Workaround prefetch issue with KVM
There's a somewhat architectural issue with Radix MMU and KVM.
When coming out of a guest with AIL (Alternate Interrupt Location, ie,
MMU enabled), we start executing hypervisor code with the PID register
still containing whatever the guest has been using.
The problem is that the CPU can (and will) then start prefetching or
speculatively load from whatever host context has that same PID (if
any), thus bringing translations for that context into the TLB, which
Linux doesn't know about.
This can cause stale translations and subsequent crashes.
Fixing this in a way that is neither racy nor a huge performance
impact is difficult. We could just make the host invalidations always
use broadcast forms but that would hurt single threaded programs for
example.
We chose to fix it instead by partitioning the PID space between guest
and host. This is possible because today Linux only use 19 out of the
20 bits of PID space, so existing guests will work if we make the host
use the top half of the 20 bits space.
We additionally add support for a property to indicate to Linux the
size of the PID register which will be useful if we eventually have
processors with a larger PID space available.
There is still an issue with malicious guests purposefully setting the
PID register to a value in the hosts PID range. Hopefully future HW
can prevent that, but in the meantime, we handle it with a pair of
kludges:
- On the way out of a guest, before we clear the current VCPU in the
PACA, we check the PID and if it's outside of the permitted range
we flush the TLB for that PID.
- When context switching, if the mm is "new" on that CPU (the
corresponding bit was set for the first time in the mm cpumask), we
check if any sibling thread is in KVM (has a non-NULL VCPU pointer
in the PACA). If that is the case, we also flush the PID for that
CPU (core).
This second part is needed to handle the case where a process is
migrated (or starts a new pthread) on a sibling thread of the CPU
coming out of KVM, as there's a window where stale translations can
exist before we detect it and flush them out.
A future optimization could be added by keeping track of whether the
PID has ever been used and avoid doing that for completely fresh PIDs.
We could similarily mark PIDs that have been the subject of a global
invalidation as "fresh". But for now this will do.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
[mpe: Rework the asm to build with CONFIG_PPC_RADIX_MMU=n, drop
unneeded include of kvm_book3s_asm.h] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Merge tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi
Pull SCSI fixes from James Bottomley:
"Three small fixes.
The transfer size fixes are actually correcting some performance drops
on the hpsa and smartpqi cards. The cards actually have an internal
cache for request speed up but bypass it for transfers > 1MB. Since
4.3 the efficiency of our merges has rendered the cache mostly unused,
so limit transfers to under 1MB to recover the cache boost"
* tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi:
scsi: sg: fix static checker warning in sg_is_valid_dxfer
scsi: smartpqi: limit transfer length to 1MB
scsi: hpsa: limit transfer length to 1MB
Merge tag 'uuid-for-4.13-2' of git://git.infradead.org/users/hch/uuid
Pull uuid fixes from Christoph Hellwig:
- add a missing "!" in the uuid tests
- remove the last remaining user of the uuid_be type, and then the type
and its helpers
* tag 'uuid-for-4.13-2' of git://git.infradead.org/users/hch/uuid:
uuid: remove uuid_be
thunderbolt: use uuid_t instead of uuid_be
uuid: fix incorrect uuid_equal conversion in test_uuid_test
Merge tag 'dma-mapping-4.13-2' of git://git.infradead.org/users/hch/dma-mapping
Pull dma mapping fixes from Christoph Hellwig:
"split the global dma coherent pool from the per-device pool.
This fixes a regression in the earlier 4.13 pull requests where the
global pool would override a per-device CMA pool (Vladimir Murzin)"
* tag 'dma-mapping-4.13-2' of git://git.infradead.org/users/hch/dma-mapping:
ARM: NOMMU: Wire-up default DMA interface
dma-coherent: introduce interface for default DMA pool
parisc: Extend disabled preemption in copy_user_page
It's always bothered me that we only disable preemption in
copy_user_page around the call to flush_dcache_page_asm.
This patch extends this to after the copy.
Signed-off-by: John David Anglin <dave.anglin@bell.net> Cc: stable@vger.kernel.org # 4.9+ Signed-off-by: Helge Deller <deller@gmx.de>
parisc: Prevent TLB speculation on flushed pages on CPUs that only support equivalent aliases
Helge noticed that we flush the TLB page in flush_cache_page but not in
flush_cache_range or flush_cache_mm.
For a long time, we have had random segmentation faults building
packages on machines with PA8800/8900 processors. These machines only
support equivalent aliases. We don't see these faults on machines that
don't require strict coherency. So, it appears TLB speculation
sometimes leads to cache corruption on machines that require coherency.
This patch adds TLB flushes to flush_cache_range and flush_cache_mm when
coherency is required. We only flush the TLB in flush_cache_page when
coherency is required.
The patch also optimizes flush_cache_range. It turns out we always have
the right context to use flush_user_dcache_range_asm and
flush_user_icache_range_asm.
The patch has been tested for some time on rp3440, rp3410 and A500-44.
It's been boot tested on c8000. No random segmentation faults were
observed during testing.
Signed-off-by: John David Anglin <dave.anglin@bell.net> Cc: stable@vger.kernel.org # 4.9+ Signed-off-by: Helge Deller <deller@gmx.de>
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