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imx_gpcv2_get_wakeup_source() is not used anywhere, so remove it.
This fixes the following sparse warning:
drivers/irqchip/irq-imx-gpcv2.c:34:5: warning: symbol 'imx_gpcv2_get_wakeup_source' was not declared. Should it be static?
Fixes: e324c4dc4a59 ("irqchip/imx-gpcv2: IMX GPCv2 driver for wakeup sources")
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
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When struct its_device instances are created, the nr_ites member
will be set to a power of 2 that equals or exceeds the requested
number of MSIs passed to the msi_prepare() callback. At the same
time, the LPI map is allocated to be some multiple of 32 in size,
where the allocated size may be less than the requested size
depending on whether a contiguous range of sufficient size is
available in the global LPI bitmap.
This may result in the situation where the nr_ites < nr_lpis, and
since nr_ites is what we program into the hardware when we map the
device, the additional LPIs will be non-functional.
For bog standard hardware, this does not really matter. However,
in cases where ITS device IDs are shared between different PCIe
devices, we may end up allocating these additional LPIs without
taking into account that they don't actually work.
So let's make nr_ites at least 32. This ensures that all allocated
LPIs are 'live', and that its_alloc_device_irq() will fail when
attempts are made to allocate MSIs beyond what was allocated in
the first place.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
[maz: updated comment]
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
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snd_pcm_oss_get_formats() has an obvious use-after-free around
snd_mask_test() calls, as spotted by syzbot. The passed format_mask
argument is a pointer to the hw_params object that is freed before the
loop. What a surprise that it has been present since the original
code of decades ago...
Reported-by: syzbot+4090700a4f13fccaf648@syzkaller.appspotmail.com
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild
Pull Kbuild fixes from Masahiro Yamada:
- make fixdep parse kconfig.h to fix missing rebuild
- replace hyphens with underscores in builtin DTB label names
- fix typos
* tag 'kbuild-fixes-v4.16-2' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
kbuild: Handle builtin dtb file names containing hyphens
scripts/bloat-o-meter: fix typos in help
fixdep: do not ignore kconfig.h
fixdep: remove some false CONFIG_ matches
fixdep: remove stale references to uml-config.h
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git://www.linux-watchdog.org/linux-watchdog
Pull watchdog fixes from Wim Van Sebroeck:
- f71808e_wdt: Fix magic close handling
- sbsa: 32-bit read fix for WCV
- hpwdt: Remove legacy NMI sourcing
* tag 'linux-watchdog-4.16-fixes-2' of git://www.linux-watchdog.org/linux-watchdog:
watchdog: hpwdt: Remove legacy NMI sourcing.
watchdog: sbsa: use 32-bit read for WCV
watchdog: f71808e_wdt: Fix magic close handling
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Pull block fixes from Jens Axboe:
- a xen-blkfront fix from Bhavesh with a multiqueue fix when
detaching/re-attaching
- a few important NVMe fixes, including a revert for a sysfs fix that
caused some user space confusion
- two bcache fixes by way of Michael Lyle
- a loop regression fix, fixing an issue with lost writes on DAX.
* tag 'for-linus-20180309' of git://git.kernel.dk/linux-block:
loop: Fix lost writes caused by missing flag
nvme_fc: rework sqsize handling
nvme-fabrics: Ignore nr_io_queues option for discovery controllers
xen-blkfront: move negotiate_mq to cover all cases of new VBDs
Revert "nvme: create 'slaves' and 'holders' entries for hidden controllers"
bcache: don't attach backing with duplicate UUID
bcache: fix crashes in duplicate cache device register
nvme: pci: pass max vectors as num_possible_cpus() to pci_alloc_irq_vectors
nvme-pci: Fix EEH failure on ppc
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git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
Pull device mapper fixes from Mike Snitzer:
- Fix an uninitialized variable false warning in dm bufio
- Fix DM's passthrough ioctl support to be race free against an
underlying device being removed.
- Fix corner-case of DM raid resync reporting if/when the raid becomes
degraded during resync; otherwise automated raid repair will fail.
- A few DM multipath fixes to make non-SCSI optimizations, that were
introduced during the 4.16 merge, useful for all non-SCSI devices,
rather than narrowly define this non-SCSI mode in terms of "nvme".
This allows the removal of "queue_mode nvme" that really didn't need
to be introduced. Instead DM core will internalize whether
nvme-specific IO submission optimizations are doable and DM multipath
will only do SCSI-specific device handler operations if SCSI is in
use.
* tag 'for-4.16/dm-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
dm table: allow upgrade from bio-based to specialized bio-based variant
dm mpath: remove unnecessary NVMe branching in favor of scsi_dh checks
dm table: fix "nvme" test
dm raid: fix incorrect sync_ratio when degraded
dm: use blkdev_get rather than bdgrab when issuing pass-through ioctl
dm bufio: avoid false-positive Wmaybe-uninitialized warning
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Pull rdma fixes from Doug Ledford:
- Various driver bug fixes in mlx5, mlx4, bnxt_re and qedr, ranging
from bugs under load to bad error case handling
- There in one largish patch fixing the locking in bnxt_re to avoid a
machine hard lock situation
- A few core bugs on error paths
- A patch to reduce stack usage in the new CQ API
- One mlx5 regression introduced in this merge window
- There were new syzkaller scripts written for the RDMA subsystem and
we are fixing issues found by the bot
- One of the commits (aa0de36a40f4 “RDMA/mlx5: Fix integer overflow
while resizing CQ”) is missing part of the commit log message and one
of the SOB lines. The original patch was from Leon Romanovsky, and a
cut-n-paste separator in the commit message confused patchworks which
then put the end of message separator in the wrong place in the
downloaded patch, and I didn’t notice in time. The patch made it into
the official branch, and the only way to fix it in-place was to
rebase. Given the pain that a rebase causes, and the fact that the
patch has relevant tags for stable and syzkaller, a revert of the
munged patch and a reapplication of the original patch with the log
message intact was done.
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: (25 commits)
RDMA/mlx5: Fix integer overflow while resizing CQ
Revert "RDMA/mlx5: Fix integer overflow while resizing CQ"
RDMA/ucma: Check that user doesn't overflow QP state
RDMA/mlx5: Fix integer overflow while resizing CQ
RDMA/ucma: Limit possible option size
IB/core: Fix possible crash to access NULL netdev
RDMA/bnxt_re: Avoid Hard lockup during error CQE processing
RDMA/core: Reduce poll batch for direct cq polling
IB/mlx5: Fix an error code in __mlx5_ib_modify_qp()
IB/mlx5: When not in dual port RoCE mode, use provided port as native
IB/mlx4: Include GID type when deleting GIDs from HW table under RoCE
IB/mlx4: Fix corruption of RoCEv2 IPv4 GIDs
RDMA/qedr: Fix iWARP write and send with immediate
RDMA/qedr: Fix kernel panic when running fio over NFSoRDMA
RDMA/qedr: Fix iWARP connect with port mapper
RDMA/qedr: Fix ipv6 destination address resolution
IB/core : Add null pointer check in addr_resolve
RDMA/bnxt_re: Fix the ib_reg failure cleanup
RDMA/bnxt_re: Fix incorrect DB offset calculation
RDMA/bnxt_re: Unconditionly fence non wire memory operations
...
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git://git.infradead.org/linux-platform-drivers-x86
Pull x86 platform driver fixes from Darren Hart:
"Correct a module loading race condition between the DELL_SMBIOS
backend modules and the first user by converting them to bool features
of the DELL_SMBIOS driver. Fixup the resulting Kconfig dependency
issue with DCDBAS"
* tag 'platform-drivers-x86-v4.16-6' of git://git.infradead.org/linux-platform-drivers-x86:
platform/x86: dell-smbios: Resolve dependency error on DCDBAS
platform/x86: Allow for SMBIOS backend defaults
platform/x86: dell-smbios: Link all dell-smbios-* modules together
platform/x86: dell-smbios: Rename dell-smbios source to dell-smbios-base
platform/x86: dell-smbios: Correct some style warnings
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When releasing a client, we need to clear the clienttab[] entry at
first, then call snd_seq_queue_client_leave(). Otherwise, the
in-flight cell in the queue might be picked up by the timer interrupt
via snd_seq_check_queue() before calling snd_seq_queue_client_leave(),
and it's delivered to another queue while the client is clearing
queues. This may eventually result in an uncleared cell remaining in
a queue, and the later snd_seq_pool_delete() may need to wait for a
long time until the event gets really processed.
By moving the clienttab[] clearance at the beginning of release, any
event delivery of a cell belonging to this client will fail at a later
point, since snd_seq_client_ptr() returns NULL. Thus the cell that
was picked up by the timer interrupt will be returned immediately
without further delivery, and the long stall of snd_seq_delete_pool()
can be avoided, too.
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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Although we've covered the races between concurrent write() and
ioctl() in the previous patch series, there is still a possible UAF in
the following scenario:
A: user client closed B: timer irq
-> snd_seq_release() -> snd_seq_timer_interrupt()
-> snd_seq_free_client() -> snd_seq_check_queue()
-> cell = snd_seq_prioq_cell_peek()
-> snd_seq_prioq_leave()
.... removing all cells
-> snd_seq_pool_done()
.... vfree()
-> snd_seq_compare_tick_time(cell)
... Oops
So the problem is that a cell is peeked and accessed without any
protection until it's retrieved from the queue again via
snd_seq_prioq_cell_out().
This patch tries to address it, also cleans up the code by a slight
refactoring. snd_seq_prioq_cell_out() now receives an extra pointer
argument. When it's non-NULL, the function checks the event timestamp
with the given pointer. The caller needs to pass the right reference
either to snd_seq_tick or snd_seq_realtime depending on the event
timestamp type.
A good news is that the above change allows us to remove the
snd_seq_prioq_cell_peek(), too, thus the patch actually reduces the
code size.
Reviewed-by: Nicolai Stange <nstange@suse.de>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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Pull KVM fixes from Radim Krčmář:
"PPC:
- Fix guest time accounting in the host
- Fix large-page backing for radix guests on POWER9
- Fix HPT guests on POWER9 backed by 2M or 1G pages
- Compile fixes for some configs and gcc versions
s390:
- Fix random memory corruption when running as guest2 (e.g. KVM in
LPAR) and starting guest3 (e.g. nested KVM) with many CPUs
- Export forgotten io interrupt delivery statistics counter"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: s390: fix memory overwrites when not using SCA entries
KVM: PPC: Book3S HV: Fix guest time accounting with VIRT_CPU_ACCOUNTING_GEN
KVM: PPC: Book3S HV: Fix VRMA initialization with 2MB or 1GB memory backing
KVM: PPC: Book3S HV: Fix handling of large pages in radix page fault handler
KVM: s390: provide io interrupt kvm_stat
KVM: PPC: Book3S: Fix compile error that occurs with some gcc versions
KVM: PPC: Fix compile error that occurs when CONFIG_ALTIVEC=n
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git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip
Pull xen fix from Juergen Gross:
"Just one fix for the correct error handling after a failed
device_register()"
* tag 'for-linus-4.16a-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
xen: xenbus: use put_device() instead of kfree()
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git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Catalin Marinas:
- The SMCCC firmware interface for the spectre variant 2 mitigation has
been updated to allow the discovery of whether the CPU needs the
workaround. This pull request relaxes the kernel check on the return
value from firmware.
- Fix the commit allowing changing from global to non-global page table
entries which inadvertently disallowed other safe attribute changes.
- Fix sleeping in atomic during the arm_perf_teardown_cpu() code.
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: Relax ARM_SMCCC_ARCH_WORKAROUND_1 discovery
arm_pmu: Use disable_irq_nosync when disabling SPI in CPU teardown hook
arm64: mm: fix thinko in non-global page table attribute check
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Pull Documentation build fix from Jonathan Corbet:
"The Sphinx 1.7 release broke the build process for reasons that are
mostly our fault.
This is a single fix cherry-picked from docs-next that restores docs
buildability for all supported Sphinx versions"
* tag 'docs-4.16-fix' of git://git.lwn.net/linux:
Documentation/sphinx: Fix Directive import error
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Merge misc fixes from Andrew Morton:
"8 fixes"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
lib/test_kmod.c: fix limit check on number of test devices created
selftests/vm/run_vmtests: adjust hugetlb size according to nr_cpus
mm/page_alloc: fix memmap_init_zone pageblock alignment
mm/memblock.c: hardcode the end_pfn being -1
mm/gup.c: teach get_user_pages_unlocked to handle FOLL_NOWAIT
lib/bug.c: exclude non-BUG/WARN exceptions from report_bug()
bug: use %pB in BUG and stack protector failure
hugetlb: fix surplus pages accounting
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As reported by Dan the parentheses is in the wrong place, and since
unlikely() call returns either 0 or 1 it's never less than zero. The
second issue is that signed integer overflows like "INT_MAX + 1" are
undefined behavior.
Since num_test_devs represents the number of devices, we want to stop
prior to hitting the max, and not rely on the wrap arround at all. So
just cap at num_test_devs + 1, prior to assigning a new device.
Link: http://lkml.kernel.org/r/20180224030046.24238-1-mcgrof@kernel.org
Fixes: d9c6a72d6fa2 ("kmod: add test driver to stress test the module loader")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Luis R. Rodriguez <mcgrof@kernel.org>
Acked-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Fix userfaultfd_hugetlb on hosts which have more than 64 cpus.
---------------------------
running userfaultfd_hugetlb
---------------------------
invalid MiB
Usage: <MiB> <bounces>
[FAIL]
Via userfaultfd.c we can know, hugetlb_size needs to meet hugetlb_size
>= nr_cpus * hugepage_size. hugepage_size is often 2M, so when host
cpus > 64, it requires more than 128M.
[zhijianx.li@intel.com: update changelog/comments and variable name]
Link: http://lkml.kernel.org/r/20180302024356.83359-1-zhijianx.li@intel.com
Link: http://lkml.kernel.org/r/20180303125027.81638-1-zhijianx.li@intel.com
Link: http://lkml.kernel.org/r/20180302024356.83359-1-zhijianx.li@intel.com
Signed-off-by: Li Zhijian <zhijianx.li@intel.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: SeongJae Park <sj38.park@gmail.com>
Cc: Philippe Ombredanne <pombredanne@nexb.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Commit b92df1de5d28 ("mm: page_alloc: skip over regions of invalid pfns
where possible") introduced a bug where move_freepages() triggers a
VM_BUG_ON() on uninitialized page structure due to pageblock alignment.
To fix this, simply align the skipped pfns in memmap_init_zone() the
same way as in move_freepages_block().
Seen in one of the RHEL reports:
crash> log | grep -e BUG -e RIP -e Call.Trace -e move_freepages_block -e rmqueue -e freelist -A1
kernel BUG at mm/page_alloc.c:1389!
invalid opcode: 0000 [#1] SMP
--
RIP: 0010:[<ffffffff8118833e>] [<ffffffff8118833e>] move_freepages+0x15e/0x160
RSP: 0018:ffff88054d727688 EFLAGS: 00010087
--
Call Trace:
[<ffffffff811883b3>] move_freepages_block+0x73/0x80
[<ffffffff81189e63>] __rmqueue+0x263/0x460
[<ffffffff8118c781>] get_page_from_freelist+0x7e1/0x9e0
[<ffffffff8118caf6>] __alloc_pages_nodemask+0x176/0x420
--
RIP [<ffffffff8118833e>] move_freepages+0x15e/0x160
RSP <ffff88054d727688>
crash> page_init_bug -v | grep RAM
<struct resource 0xffff88067fffd2f8> 1000 - 9bfff System RAM (620.00 KiB)
<struct resource 0xffff88067fffd3a0> 100000 - 430bffff System RAM ( 1.05 GiB = 1071.75 MiB = 1097472.00 KiB)
<struct resource 0xffff88067fffd410> 4b0c8000 - 4bf9cfff System RAM ( 14.83 MiB = 15188.00 KiB)
<struct resource 0xffff88067fffd480> 4bfac000 - 646b1fff System RAM (391.02 MiB = 400408.00 KiB)
<struct resource 0xffff88067fffd560> 7b788000 - 7b7fffff System RAM (480.00 KiB)
<struct resource 0xffff88067fffd640> 100000000 - 67fffffff System RAM ( 22.00 GiB)
crash> page_init_bug | head -6
<struct resource 0xffff88067fffd560> 7b788000 - 7b7fffff System RAM (480.00 KiB)
<struct page 0xffffea0001ede200> 1fffff00000000 0 <struct pglist_data 0xffff88047ffd9000> 1 <struct zone 0xffff88047ffd9800> DMA32 4096 1048575
<struct page 0xffffea0001ede200> 505736 505344 <struct page 0xffffea0001ed8000> 505855 <struct page 0xffffea0001edffc0>
<struct page 0xffffea0001ed8000> 0 0 <struct pglist_data 0xffff88047ffd9000> 0 <struct zone 0xffff88047ffd9000> DMA 1 4095
<struct page 0xffffea0001edffc0> 1fffff00000400 0 <struct pglist_data 0xffff88047ffd9000> 1 <struct zone 0xffff88047ffd9800> DMA32 4096 1048575
BUG, zones differ!
Note that this range follows two not populated sections
68000000-77ffffff in this zone. 7b788000-7b7fffff is the first one
after a gap. This makes memmap_init_zone() skip all the pfns up to the
beginning of this range. But this range is not pageblock (2M) aligned.
In fact no range has to be.
crash> kmem -p 77fff000 78000000 7b5ff000 7b600000 7b787000 7b788000
PAGE PHYSICAL MAPPING INDEX CNT FLAGS
ffffea0001e00000 78000000 0 0 0 0
ffffea0001ed7fc0 7b5ff000 0 0 0 0
ffffea0001ed8000 7b600000 0 0 0 0 <<<<
ffffea0001ede1c0 7b787000 0 0 0 0
ffffea0001ede200 7b788000 0 0 1 1fffff00000000
Top part of page flags should contain nodeid and zonenr, which is not
the case for page ffffea0001ed8000 here (<<<<).
crash> log | grep -o fffea0001ed[^\ ]* | sort -u
fffea0001ed8000
fffea0001eded20
fffea0001edffc0
crash> bt -r | grep -o fffea0001ed[^\ ]* | sort -u
fffea0001ed8000
fffea0001eded00
fffea0001eded20
fffea0001edffc0
Initialization of the whole beginning of the section is skipped up to
the start of the range due to the commit b92df1de5d28. Now any code
calling move_freepages_block() (like reusing the page from a freelist as
in this example) with a page from the beginning of the range will get
the page rounded down to start_page ffffea0001ed8000 and passed to
move_freepages() which crashes on assertion getting wrong zonenr.
> VM_BUG_ON(page_zone(start_page) != page_zone(end_page));
Note, page_zone() derives the zone from page flags here.
From similar machine before commit b92df1de5d28:
crash> kmem -p 77fff000 78000000 7b5ff000 7b600000 7b7fe000 7b7ff000
PAGE PHYSICAL MAPPING INDEX CNT FLAGS
fffff73941e00000 78000000 0 0 1 1fffff00000000
fffff73941ed7fc0 7b5ff000 0 0 1 1fffff00000000
fffff73941ed8000 7b600000 0 0 1 1fffff00000000
fffff73941edff80 7b7fe000 0 0 1 1fffff00000000
fffff73941edffc0 7b7ff000 ffff8e67e04d3ae0 ad84 1 1fffff00020068 uptodate,lru,active,mappedtodisk
All the pages since the beginning of the section are initialized.
move_freepages()' not gonna blow up.
The same machine with this fix applied:
crash> kmem -p 77fff000 78000000 7b5ff000 7b600000 7b7fe000 7b7ff000
PAGE PHYSICAL MAPPING INDEX CNT FLAGS
ffffea0001e00000 78000000 0 0 0 0
ffffea0001e00000 7b5ff000 0 0 0 0
ffffea0001ed8000 7b600000 0 0 1 1fffff00000000
ffffea0001edff80 7b7fe000 0 0 1 1fffff00000000
ffffea0001edffc0 7b7ff000 ffff88017fb13720 8 2 1fffff00020068 uptodate,lru,active,mappedtodisk
At least the bare minimum of pages is initialized preventing the crash
as well.
Customers started to report this as soon as 7.4 (where b92df1de5d28 was
merged in RHEL) was released. I remember reports from
September/October-ish times. It's not easily reproduced and happens on
a handful of machines only. I guess that's why. But that does not make
it less serious, I think.
Though there actually is a report here:
https://bugzilla.kernel.org/show_bug.cgi?id=196443
And there are reports for Fedora from July:
https://bugzilla.redhat.com/show_bug.cgi?id=1473242
and CentOS:
https://bugs.centos.org/view.php?id=13964
and we internally track several dozens reports for RHEL bug
https://bugzilla.redhat.com/show_bug.cgi?id=1525121
Link: http://lkml.kernel.org/r/0485727b2e82da7efbce5f6ba42524b429d0391a.1520011945.git.neelx@redhat.com
Fixes: b92df1de5d28 ("mm: page_alloc: skip over regions of invalid pfns where possible")
Signed-off-by: Daniel Vacek <neelx@redhat.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Pavel Tatashin <pasha.tatashin@oracle.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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This is just a cleanup. It aids handling the special end case in the
next commit.
[akpm@linux-foundation.org: make it work against current -linus, not against -mm]
[akpm@linux-foundation.org: make it work against current -linus, not against -mm some more]
Link: http://lkml.kernel.org/r/1ca478d4269125a99bcfb1ca04d7b88ac1aee924.1520011944.git.neelx@redhat.com
Signed-off-by: Daniel Vacek <neelx@redhat.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Pavel Tatashin <pasha.tatashin@oracle.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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KVM is hanging during postcopy live migration with userfaultfd because
get_user_pages_unlocked is not capable to handle FOLL_NOWAIT.
Earlier FOLL_NOWAIT was only ever passed to get_user_pages.
Specifically faultin_page (the callee of get_user_pages_unlocked caller)
doesn't know that if FAULT_FLAG_RETRY_NOWAIT was set in the page fault
flags, when VM_FAULT_RETRY is returned, the mmap_sem wasn't actually
released (even if nonblocking is not NULL). So it sets *nonblocking to
zero and the caller won't release the mmap_sem thinking it was already
released, but it wasn't because of FOLL_NOWAIT.
Link: http://lkml.kernel.org/r/20180302174343.5421-2-aarcange@redhat.com
Fixes: ce53053ce378c ("kvm: switch get_user_page_nowait() to get_user_pages_unlocked()")
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Reported-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Tested-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Commit b8347c219649 ("x86/debug: Handle warnings before the notifier
chain, to fix KGDB crash") changed the ordering of fixups, and did not
take into account the case of x86 processing non-WARN() and non-BUG()
exceptions. This would lead to output of a false BUG line with no other
information.
In the case of a refcount exception, it would be immediately followed by
the refcount WARN(), producing very strange double-"cut here":
lkdtm: attempting bad refcount_inc() overflow
------------[ cut here ]------------
Kernel BUG at 0000000065f29de5 [verbose debug info unavailable]
------------[ cut here ]------------
refcount_t overflow at lkdtm_REFCOUNT_INC_OVERFLOW+0x6b/0x90 in cat[3065], uid/euid: 0/0
WARNING: CPU: 0 PID: 3065 at kernel/panic.c:657 refcount_error_report+0x9a/0xa4
...
In the prior ordering, exceptions were searched first:
do_trap_no_signal(struct task_struct *tsk, int trapnr, char *str,
...
if (fixup_exception(regs, trapnr))
return 0;
- if (fixup_bug(regs, trapnr))
- return 0;
-
As a result, fixup_bugs()'s is_valid_bugaddr() didn't take into account
needing to search the exception list first, since that had already
happened.
So, instead of searching the exception list twice (once in
is_valid_bugaddr() and then again in fixup_exception()), just add a
simple sanity check to report_bug() that will immediately bail out if a
BUG() (or WARN()) entry is not found.
Link: http://lkml.kernel.org/r/20180301225934.GA34350@beast
Fixes: b8347c219649 ("x86/debug: Handle warnings before the notifier chain, to fix KGDB crash")
Signed-off-by: Kees Cook <keescook@chromium.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Richard Weinberger <richard.weinberger@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
The BUG and stack protector reports were still using a raw %p. This
changes it to %pB for more meaningful output.
Link: http://lkml.kernel.org/r/20180301225704.GA34198@beast
Fixes: ad67b74d2469 ("printk: hash addresses printed with %p")
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Richard Weinberger <richard.weinberger@gmail.com>,
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
Dan Rue has noticed that libhugetlbfs test suite fails counter test:
# mount_point="/mnt/hugetlb/"
# echo 200 > /proc/sys/vm/nr_hugepages
# mkdir -p "${mount_point}"
# mount -t hugetlbfs hugetlbfs "${mount_point}"
# export LD_LIBRARY_PATH=/root/libhugetlbfs/libhugetlbfs-2.20/obj64
# /root/libhugetlbfs/libhugetlbfs-2.20/tests/obj64/counters
Starting testcase "/root/libhugetlbfs/libhugetlbfs-2.20/tests/obj64/counters", pid 3319
Base pool size: 0
Clean...
FAIL Line 326: Bad HugePages_Total: expected 0, actual 1
The bug was bisected to 0c397daea1d4 ("mm, hugetlb: further simplify
hugetlb allocation API").
The reason is that alloc_surplus_huge_page() misaccounts per node
surplus pages. We should increase surplus_huge_pages_node rather than
nr_huge_pages_node which is already handled by alloc_fresh_huge_page.
Link: http://lkml.kernel.org/r/20180221191439.GM2231@dhcp22.suse.cz
Fixes: 0c397daea1d4 ("mm, hugetlb: further simplify hugetlb allocation API")
Signed-off-by: Michal Hocko <mhocko@suse.com>
Reported-by: Dan Rue <dan.rue@linaro.org>
Tested-by: Dan Rue <dan.rue@linaro.org>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
|
|
The user can provide very large cqe_size which will cause to integer
overflow as it can be seen in the following UBSAN warning:
=======================================================================
UBSAN: Undefined behaviour in drivers/infiniband/hw/mlx5/cq.c:1192:53
signed integer overflow:
64870 * 65536 cannot be represented in type 'int'
CPU: 0 PID: 267 Comm: syzkaller605279 Not tainted 4.15.0+ #90 Hardware
name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
rel-1.7.5-0-ge51488c-20140602_164612-nilsson.home.kraxel.org 04/01/2014
Call Trace:
dump_stack+0xde/0x164
? dma_virt_map_sg+0x22c/0x22c
ubsan_epilogue+0xe/0x81
handle_overflow+0x1f3/0x251
? __ubsan_handle_negate_overflow+0x19b/0x19b
? lock_acquire+0x440/0x440
mlx5_ib_resize_cq+0x17e7/0x1e40
? cyc2ns_read_end+0x10/0x10
? native_read_msr_safe+0x6c/0x9b
? cyc2ns_read_end+0x10/0x10
? mlx5_ib_modify_cq+0x220/0x220
? sched_clock_cpu+0x18/0x200
? lookup_get_idr_uobject+0x200/0x200
? rdma_lookup_get_uobject+0x145/0x2f0
ib_uverbs_resize_cq+0x207/0x3e0
? ib_uverbs_ex_create_cq+0x250/0x250
ib_uverbs_write+0x7f9/0xef0
? cyc2ns_read_end+0x10/0x10
? print_irqtrace_events+0x280/0x280
? ib_uverbs_ex_create_cq+0x250/0x250
? uverbs_devnode+0x110/0x110
? sched_clock_cpu+0x18/0x200
? do_raw_spin_trylock+0x100/0x100
? __lru_cache_add+0x16e/0x290
__vfs_write+0x10d/0x700
? uverbs_devnode+0x110/0x110
? kernel_read+0x170/0x170
? sched_clock_cpu+0x18/0x200
? security_file_permission+0x93/0x260
vfs_write+0x1b0/0x550
SyS_write+0xc7/0x1a0
? SyS_read+0x1a0/0x1a0
? trace_hardirqs_on_thunk+0x1a/0x1c
entry_SYSCALL_64_fastpath+0x1e/0x8b
RIP: 0033:0x433549
RSP: 002b:00007ffe63bd1ea8 EFLAGS: 00000217
=======================================================================
Cc: syzkaller <syzkaller@googlegroups.com>
Cc: <stable@vger.kernel.org> # 3.13
Fixes: bde51583f49b ("IB/mlx5: Add support for resize CQ")
Reported-by: Noa Osherovich <noaos@mellanox.com>
Reviewed-by: Yishai Hadas <yishaih@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
|
|
The original commit of this patch has a munged log message that is
missing several of the tags the original author intended to be on the
patch. This was due to patchworks misinterpreting a cut-n-paste
separator line as an end of message line and munging the mbox that was
used to import the patch:
https://patchwork.kernel.org/patch/10264089/
The original patch will be reapplied with a fixed commit message so the
proper tags are applied.
This reverts commit aa0de36a40f446f5a21a7c1e677b98206e242edb.
Signed-off-by: Doug Ledford <dledford@redhat.com>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci
Pull PCI fixes from Bjorn Helgaas:
- fix sparc build issue when OF_IRQ not enabled (Guenter Roeck)
- fix enumeration of devices below switches on DesignWare-based
controllers (Koen Vandeputte)
* tag 'pci-v4.16-fixes-3' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
PCI: dwc: Fix enumeration end when reaching root subordinate
PCI: Move of_irq_parse_and_map_pci() declaration under OF_IRQ
|
|
Pull fbdev fix from Bartlomiej Zolnierkiewicz:
"Just a single fix to close a kernel data leak in FBIOGETCMAP_SPARC
ioctl"
* tag 'fbdev-v4.16-rc5' of git://github.com/bzolnier/linux:
fbdev: Fixing arbitrary kernel leak in case FBIOGETCMAP_SPARC in sbusfb_ioctl_helper().
|
|
git://people.freedesktop.org/~airlied/linux
Pull drm fixes from Dave Airlie:
"There are a small set of sun4i and i915 fixes, and many more amdgpu
fixes:
sun4i:
- divide by zero fix
- clock and LVDS fixes
i915:
- fix for perf
- race fix
amdgpu:
- a bit more than we are normally comfortable with at this point,
however it does fix a lot of display issues with the new DC code
which result in black screens in various configurations along with
some run of the mill gpu configuration fixes.
I'm happy enough that the fixes are limited to the DC code and
should fix a bunch of issues on the new raven ridge APUs that we
are seeing shipped now"
* tag 'drm-fixes-for-v4.16-rc5' of git://people.freedesktop.org/~airlied/linux: (42 commits)
drm/amd/display: validate plane format on primary plane
drm/amdgpu:Always save uvd vcpu_bo in VM Mode
drm/amdgpu:Correct max uvd handles
drm/amd/display: early return if not in vga mode in disable_vga
drm/amd/display: Fix takover from VGA mode
drm/amd/display: Fix memleaks when atomic check fails.
drm/amd/display: Return success when enabling interrupt
drm/amd/display: Use crtc enable/disable_vblank hooks
drm/amd/display: update infoframe after dig fe is turned on
drm/amd/display: fix boot-up on vega10
drm/amd/display: fix cursor related Pstate hang
drm/amd/display: Set irq state only on existing crtcs
drm/amd/display: Fixed non-native modes not lighting up
drm/amd/display: Call update_stream_signal directly from amdgpu_dm
drm/amd/display: Make create_stream_for_sink more consistent
drm/amd/display: Don't block dual-link DVI modes
drm/amd/display: Don't allow dual-link DVI on all ASICs.
drm/amd/display: Pass signal directly to enable_tmds_output
drm/amd/display: Remove unnecessary fail labels in create_stream_for_sink
drm/amd/display: Move MAX_TMDS_CLOCK define to header
...
|
|
Handle vendor defined behavior in tcpci_init, tcpci_set_vconn, tcpci_start_drp_toggling
and export tcpci_irq. More operations can be extended in tcpci_data if needed.
According to TCPCI specification, 4.4.5.2 ROLE_CONTROL,
TCPC shall not start DRP toggling until subsequently the TCPM
writes to the COMMAND register to start DRP toggling.
DRP toggling flow is changed as following:
- Write DRP = 1, Rp level and RC.CCx to Rd/Rd or Rp/Rp
- Set LOOK4CONNECTION command
Signed-off-by: ShuFan Lee <shufan_lee@richtek.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
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Do not log an error if tcpm_register_port() fails with -EPROBE_DEFER.
Fixes: cf140a356971 ("typec: fusb302: Use dev_err during probe")
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Scatter-gather needs to be disabled when using dma_declare_coherent_memory
and HCD_LOCAL_MEM. Andrea Righi made the equivalent fix for EHCI drivers
in commit 4307a28eb01284 "USB: EHCI: fix NULL pointer dererence in HCDs
that use HCD_LOCAL_MEM".
The following NULL pointer WARN_ON_ONCE triggered with OHCI drivers:
------------[ cut here ]------------
WARNING: CPU: 0 PID: 49 at drivers/usb/core/hcd.c:1379 hcd_alloc_coherent+0x4c/0xc8
Modules linked in:
CPU: 0 PID: 49 Comm: usb-storage Not tainted 4.15.0+ #1014
Stack : 00000000 00000000 805a78d2 0000003a 81f5c2cc 8053d367 804d77fc 00000031
805a3a08 00000563 81ee9400 805a0000 00000000 10058c00 81f61b10 805c0000
00000000 00000000 805a0000 00d9038e 00000004 803ee818 00000006 312e3420
805c0000 00000000 00000073 81f61958 00000000 00000000 802eb380 804fd538
00000009 00000563 81ee9400 805a0000 00000002 80056148 00000000 805a0000
...
Call Trace:
[<578af360>] show_stack+0x74/0x104
[<2f3702c6>] __warn+0x118/0x120
[<ae93fc9e>] warn_slowpath_null+0x44/0x58
[<a891a517>] hcd_alloc_coherent+0x4c/0xc8
[<3578fa36>] usb_hcd_map_urb_for_dma+0x4d8/0x534
[<110bc94c>] usb_hcd_submit_urb+0x82c/0x834
[<02eb5baf>] usb_sg_wait+0x14c/0x1a0
[<ccd09e85>] usb_stor_bulk_transfer_sglist.part.1+0xac/0x124
[<87a5c34c>] usb_stor_bulk_srb+0x40/0x60
[<ff1792ac>] usb_stor_Bulk_transport+0x160/0x37c
[<b9e2709c>] usb_stor_invoke_transport+0x3c/0x500
[<004754f4>] usb_stor_control_thread+0x258/0x28c
[<22edf42e>] kthread+0x134/0x13c
[<a419ffd0>] ret_from_kernel_thread+0x14/0x1c
---[ end trace bcdb825805eefdcc ]---
Signed-off-by: Fredrik Noring <noring@nocrew.org>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"Two type of fixes:
- The usual stuff, a handful HD-audio quirks for various machines
- Further hardening against ALSA sequencer ioctl/write races that are
triggered by fuzzer"
* tag 'sound-4.16-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: hda: add dock and led support for HP ProBook 640 G2
ALSA: hda: add dock and led support for HP EliteBook 820 G3
ALSA: hda/realtek - Make dock sound work on ThinkPad L570
ALSA: seq: Remove superfluous snd_seq_queue_client_leave_cells() call
ALSA: seq: More protection for concurrent write and ioctl races
ALSA: seq: Don't allow resizing pool in use
ALSA: hda/realtek - Fix dock line-out volume on Dell Precision 7520
ALSA: hda/realtek: Limit mic boost on T480
ALSA: hda/realtek - Add headset mode support for Dell laptop
ALSA: hda/realtek - Add support headset mode for DELL WYSE
ALSA: hda - Fix a wrong FIXUP for alc289 on Dell machines
|
|
Currently the driver attempts to spin lock on udc->lock before a NULL
pointer check is performed on udc, hence there is a potential null
pointer dereference on udc->lock. Fix this by moving the null check
on udc before the lock occurs.
Fixes: ea6873a45a22 ("usbip: vudc: Add SysFS infrastructure for VUDC")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Shuah Khan <shuahkh@osg.samsung.com>
Reviewed-by: Krzysztof Opasiak <k.opasiak@samsung.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Trying quirks in usbcore needs to rebuild the driver or the entire
kernel if it's builtin. It can save a lot of time if usbcore has similar
ability like "usbhid.quirks=" and "usb-storage.quirks=".
Rename the original quirk detection function to "static" as we introduce
this new "dynamic" function.
Now users can use "usbcore.quirks=" as short term workaround before the
next kernel release. Also, the quirk parameter can XOR the builtin
quirks for debugging purpose.
This is inspired by usbhid and usb-storage.
Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
A recent update to the ARM SMCCC ARCH_WORKAROUND_1 specification
allows firmware to return a non zero, positive value to describe
that although the mitigation is implemented at the higher exception
level, the CPU on which the call is made is not affected.
Let's relax the check on the return value from ARCH_WORKAROUND_1
so that we only error out if the returned value is negative.
Fixes: b092201e0020 ("arm64: Add ARM_SMCCC_ARCH_WORKAROUND_1 BP hardening support")
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
|
|
In order to allow the USB Type-C Class driver take care of
things like muxes and other possible dependencies for the
port drivers, returning ERR_PTR instead of NULL from the
registration functions in case of failure.
The reason for taking over control of the muxes for example
is because handling them in the port drivers would be just
boilerplate.
Signed-off-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Sphinx 1.7 removed sphinx.util.compat.Directive so people
who have upgraded cannot build the documentation. Switch to
docutils.parsers.rst.Directive which has been available since
docutils 0.5 released in 2009.
Bugzilla: https://bugzilla.opensuse.org/show_bug.cgi?id=1083694
Co-developed-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Cc: stable@vger.kernel.org
Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs
Pull overlayfs fixes from Miklos Szeredi:
"This fixes a corner case for NFS exporting (introduced in this cycle)
as well as fixing miscellaneous bugs"
* 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs:
ovl: update Kconfig texts
ovl: redirect_dir=nofollow should not follow redirect for opaque lower
ovl: fix ptr_ret.cocci warnings
ovl: check ERR_PTR() return value from ovl_lookup_real()
ovl: check lower ancestry on encode of lower dir file handle
ovl: hash non-dir by lower inode for fsnotify
|
|
With the new PHY wrapper in place we can now handle multiple PHYs.
Remove the code which handles only one generic PHY as this is now
covered (with support for multiple PHYs as well as suspend/resume
support) by the new PHY wrapper.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Tested-by: Neil Armstrong <narmstrong@baylibre.con>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
The new PHY wrapper is now wired up in the core HCD code. This means
that PHYs are now controlled (initialized, enabled, disabled, exited)
without requiring any host-driver specific code.
Remove the custom USB PHY handling from the ohci-platform driver as the
core HCD code now handles this.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Neil Armstrong <narmstrong@baylibre.con>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
The new PHY wrapper is now wired up in the core HCD code. This means
that PHYs are now controlled (initialized, enabled, disabled, exited)
without requiring any host-driver specific code.
Remove the custom USB PHY handling from the ehci-platform driver as the
core HCD code now handles this.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Tested-by: Neil Armstrong <narmstrong@baylibre.con>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
The new PHY wrapper is now wired up in the core HCD code. This means
that PHYs are now controlled (initialized, enabled, disabled, exited)
without requiring any host-driver specific code.
Remove the custom USB PHY handling from the xhci-mtk driver as the core
HCD code now handles this.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Tested-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
This integrates the PHY wrapper into the core hcd infrastructure.
Multiple PHYs which are part of the HCD's device tree node are now
managed (= powered on/off when needed), by the new usb_phy_roothub code.
Suspend and resume is also supported, however not for
runtime/auto-suspend (which is triggered for example when no devices are
connected to the USB bus). This is needed on some SoCs (for example
Amlogic Meson GXL) because if the PHYs are disabled during auto-suspend
then devices which are plugged in afterwards are not seen by the host.
One example where this is required is the Amlogic GXL and GXM SoCs:
They are using a dwc3 USB controller with up to three ports enabled on
the internal roothub. Each port has it's own PHY which must be enabled
(if one of the PHYs is left disabled then none of the USB ports works at
all).
The new logic works on the Amlogic GXL and GXM SoCs because the dwc3
driver internally creates a xhci-hcd which then registers a HCD which
then triggers our new PHY wrapper.
USB controller drivers can opt out of this by setting
"skip_phy_initialization" in struct usb_hcd to true. This is identical
to how it works for a single USB PHY, so the "multiple PHY" handling is
disabled for drivers that opted out of the management logic of a single
PHY.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Acked-by: Chunfeng Yun <chunfeng.yun@mediatek.com>
Tested-by: Yixun Lan <yixun.lan@amlogic.com>
Tested-by: Neil Armstrong <narmstrong@baylibre.con>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
Many SoC platforms have separate devices for the USB PHY which are
registered through the generic PHY framework. These PHYs have to be
enabled to make the USB controller actually work. They also have to be
disabled again on shutdown/suspend.
Currently (at least) the following HCI platform drivers are using custom
code to obtain all PHYs via devicetree for the roothub/controller and
disable/enable them when required:
- ehci-platform.c has ehci_platform_power_{on,off}
- xhci-mtk.c has xhci_mtk_phy_{init,exit,power_on,power_off}
- ohci-platform.c has ohci_platform_power_{on,off}
With this new wrapper the USB PHYs can be specified directly in the
USB controller's devicetree node (just like on the drivers listed
above). This allows SoCs like the Amlogic Meson GXL family to operate
correctly once this is wired up correctly. These SoCs use a dwc3
controller and require all USB PHYs to be initialized (if one of the USB
PHYs it not initialized then none of USB port works at all).
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Tested-by: Yixun Lan <yixun.lan@amlogic.com>
Cc: Chunfeng Yun <chunfeng.yun@mediatek.com>
Tested-by: Neil Armstrong <narmstrong@baylibre.con>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
The USB HCD core driver parses the device-tree node for "phys" and
"usb-phys" properties. It also manages the power state of these PHYs
automatically.
However, drivers may opt-out of this behavior by setting "phy" or
"usb_phy" in struct usb_hcd to a non-null value. An example where this
is required is the "Qualcomm USB2 controller", implemented by the
chipidea driver. The hardware requires that the PHY is only powered on
after the "reset completed" event from the controller is received.
A follow-up patch will allow the USB HCD core driver to manage more than
one PHY. Add a new "skip_phy_initialization" bitflag to struct usb_hcd
so drivers can opt-out of any PHY management provided by the USB HCD
core driver.
This also updates the existing drivers so they use the new flag if they
want to opt out of the PHY management provided by the USB HCD core
driver. This means that for these drivers the new "multiple PHY"
handling (which will be added in a follow-up patch) will be disabled as
well.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Acked-by: Peter Chen <peter.chen@nxp.com>
Tested-by: Neil Armstrong <narmstrong@baylibre.con>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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A USB HCD may have several PHYs which need to be configured before the
the HCD starts working.
This adds the documentation for such a USB HCD as well as a reference to
the new "usb-hcd.txt" from all bindings that implement a USB HCD which
support one USB PHY per port.
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Tested-by: Yixun Lan <yixun.lan@amlogic.com>
Tested-by: Neil Armstrong <narmstrong@baylibre.con>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Use kasprintf instead of combination of kmalloc and sprintf and
therefore avoid unnecessary computation of string length.
Also, remove the useless local variable.
Signed-off-by: Himanshu Jha <himanshujha199640@gmail.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Pull xfs fixes from Darrick Wong:
- Fix some iomap locking problems
- Don't allocate cow blocks when we're zeroing file data
* tag 'xfs-4.16-fixes-3' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
xfs: don't block on the ilock for RWF_NOWAIT
xfs: don't start out with the exclusive ilock for direct I/O
xfs: don't allocate COW blocks for zeroing holes or unwritten extents
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ACPI spec inserts sections for new features frequently and section
numbers are changed. It is easy to refer to ACPI spec if ACPI version
is available in comments.
There are no functional changes.
Signed-off-by: Alex Hung <alex.hung@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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