platform/kernel/linux-starfive.git
5 years agoMerge branch 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa...
Linus Torvalds [Sat, 31 Aug 2019 17:27:42 +0000 (10:27 -0700)]
Merge branch 'i2c/for-current' of git://git./linux/kernel/git/wsa/linux

Pull i2c fixes from Wolfram Sang:
 "I2C has a bunch of driver fixes and a core improvement to make the
  on-going API transition more robust"

* 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux:
  i2c: mediatek: disable zero-length transfers for mt8183
  i2c: iproc: Stop advertising support of SMBUS quick cmd
  MAINTAINERS: i2c mv64xxx: Update documentation path
  i2c: piix4: Fix port selection for AMD Family 16h Model 30h
  i2c: designware: Synchronize IRQs when unregistering slave client
  i2c: i801: Avoid memory leak in check_acpi_smo88xx_device()
  i2c: make i2c_unregister_device() ERR_PTR safe

5 years agoMerge tag 'trace-v5.3-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...
Linus Torvalds [Sat, 31 Aug 2019 16:15:25 +0000 (09:15 -0700)]
Merge tag 'trace-v5.3-rc6' of git://git./linux/kernel/git/rostedt/linux-trace

Pull tracing fixes from Steven Rostedt:
 "Small fixes and minor cleanups for tracing:

   - Make exported ftrace function not static

   - Fix NULL pointer dereference in reading probes as they are created

   - Fix NULL pointer dereference in k/uprobe clean up path

   - Various documentation fixes"

* tag 'trace-v5.3-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
  tracing: Correct kdoc formats
  ftrace/x86: Remove mcount() declaration
  tracing/probe: Fix null pointer dereference
  tracing: Make exported ftrace_set_clr_event non-static
  ftrace: Check for successful allocation of hash
  ftrace: Check for empty hash and comment the race with registering probes
  ftrace: Fix NULL pointer dereference in t_probe_next()

5 years agoMerge tag 'riscv/for-v5.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv...
Linus Torvalds [Sat, 31 Aug 2019 16:02:36 +0000 (09:02 -0700)]
Merge tag 'riscv/for-v5.3-rc7' of git://git./linux/kernel/git/riscv/linux

Pull RISC-V fix from Paul Walmsley:
 "One significant fix for 32-bit RISC-V systems:

  Fix the RV32 memory map to prevent userspace from corrupting the
  FIXMAP area. Without this patch, the system can crash very early
  during the boot"

* tag 'riscv/for-v5.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux:
  RISC-V: Fix FIXMAP area corruption on RV32 systems

5 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Sat, 31 Aug 2019 15:51:48 +0000 (08:51 -0700)]
Merge tag 'for-linus' of git://git./virt/kvm/kvm

Pull KVM fixes from Radim Krčmář:
 "PPC:
   - Fix bug which could leave locks held in the host on return to a
     guest.

  x86:
   - Prevent infinitely looping emulation of a failing syscall while
     single stepping.

   - Do not crash the host when nesting is disabled"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: x86: Don't update RIP or do single-step on faulting emulation
  KVM: x86: hyper-v: don't crash on KVM_GET_SUPPORTED_HV_CPUID when kvm_intel.nested is disabled
  KVM: PPC: Book3S: Fix incorrect guest-to-user-translation error handling

5 years agoMerge branch 'akpm' (patches from Andrew)
Linus Torvalds [Sat, 31 Aug 2019 15:31:48 +0000 (08:31 -0700)]
Merge branch 'akpm' (patches from Andrew)

Merge misc mm fixes from Andrew Morton:
 "7 fixes"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
  mm: memcontrol: fix percpu vmstats and vmevents flush
  mm, memcg: do not set reclaim_state on soft limit reclaim
  mailmap: add aliases for Dmitry Safonov
  mm/z3fold.c: fix lock/unlock imbalance in z3fold_page_isolate
  mm, memcg: partially revert "mm/memcontrol.c: keep local VM counters in sync with the hierarchical ones"
  mm/zsmalloc.c: fix build when CONFIG_COMPACTION=n
  mm: memcontrol: flush percpu slab vmstats on kmem offlining

5 years agotracing: Correct kdoc formats
Jakub Kicinski [Wed, 28 Aug 2019 05:25:47 +0000 (22:25 -0700)]
tracing: Correct kdoc formats

Fix the following kdoc warnings:

kernel/trace/trace.c:1579: warning: Function parameter or member 'tr' not described in 'update_max_tr_single'
kernel/trace/trace.c:1579: warning: Function parameter or member 'tsk' not described in 'update_max_tr_single'
kernel/trace/trace.c:1579: warning: Function parameter or member 'cpu' not described in 'update_max_tr_single'
kernel/trace/trace.c:1776: warning: Function parameter or member 'type' not described in 'register_tracer'
kernel/trace/trace.c:2239: warning: Function parameter or member 'task' not described in 'tracing_record_taskinfo'
kernel/trace/trace.c:2239: warning: Function parameter or member 'flags' not described in 'tracing_record_taskinfo'
kernel/trace/trace.c:2269: warning: Function parameter or member 'prev' not described in 'tracing_record_taskinfo_sched_switch'
kernel/trace/trace.c:2269: warning: Function parameter or member 'next' not described in 'tracing_record_taskinfo_sched_switch'
kernel/trace/trace.c:2269: warning: Function parameter or member 'flags' not described in 'tracing_record_taskinfo_sched_switch'
kernel/trace/trace.c:3078: warning: Function parameter or member 'ip' not described in 'trace_vbprintk'
kernel/trace/trace.c:3078: warning: Function parameter or member 'fmt' not described in 'trace_vbprintk'
kernel/trace/trace.c:3078: warning: Function parameter or member 'args' not described in 'trace_vbprintk'

Link: http://lkml.kernel.org/r/20190828052549.2472-2-jakub.kicinski@netronome.com
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
5 years agoftrace/x86: Remove mcount() declaration
Jisheng Zhang [Mon, 26 Aug 2019 09:13:12 +0000 (09:13 +0000)]
ftrace/x86: Remove mcount() declaration

Commit 562e14f72292 ("ftrace/x86: Remove mcount support") removed the
support for using mcount, so we could remove the mcount() declaration
to clean up.

Link: http://lkml.kernel.org/r/20190826170150.10f101ba@xhacker.debian
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
5 years agotracing/probe: Fix null pointer dereference
Xinpeng Liu [Wed, 7 Aug 2019 23:29:23 +0000 (07:29 +0800)]
tracing/probe: Fix null pointer dereference

BUG: KASAN: null-ptr-deref in trace_probe_cleanup+0x8d/0xd0
Read of size 8 at addr 0000000000000000 by task syz-executor.0/9746
trace_probe_cleanup+0x8d/0xd0
free_trace_kprobe.part.14+0x15/0x50
alloc_trace_kprobe+0x23e/0x250

Link: http://lkml.kernel.org/r/1565220563-980-1-git-send-email-danielliu861@gmail.com
Fixes: e3dc9f898ef9c ("tracing/probe: Add trace_event_call accesses APIs")
Signed-off-by: Xinpeng Liu <danielliu861@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
5 years agotracing: Make exported ftrace_set_clr_event non-static
Denis Efremov [Thu, 4 Jul 2019 17:21:10 +0000 (20:21 +0300)]
tracing: Make exported ftrace_set_clr_event non-static

The function ftrace_set_clr_event is declared static and marked
EXPORT_SYMBOL_GPL(), which is at best an odd combination. Because the
function was decided to be a part of API, this commit removes the static
attribute and adds the declaration to the header.

Link: http://lkml.kernel.org/r/20190704172110.27041-1-efremov@linux.com
Fixes: f45d1225adb04 ("tracing: Kernel access to Ftrace instances")
Reviewed-by: Joe Jin <joe.jin@oracle.com>
Signed-off-by: Denis Efremov <efremov@linux.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
5 years agoMerge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Linus Torvalds [Sat, 31 Aug 2019 01:56:08 +0000 (18:56 -0700)]
Merge branch 'linus' of git://git./linux/kernel/git/herbert/crypto-2.6

Pull crypto fix from Herbert Xu:
 "Fix a potential crash in the ccp driver"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: ccp - Ignore unconfigured CCP device on suspend/resume

5 years agoPartially revert "kfifo: fix kfifo_alloc() and kfifo_init()"
Linus Torvalds [Sat, 31 Aug 2019 01:47:15 +0000 (18:47 -0700)]
Partially revert "kfifo: fix kfifo_alloc() and kfifo_init()"

Commit dfe2a77fd243 ("kfifo: fix kfifo_alloc() and kfifo_init()") made
the kfifo code round the number of elements up.  That was good for
__kfifo_alloc(), but it's actually wrong for __kfifo_init().

The difference? __kfifo_alloc() will allocate the rounded-up number of
elements, but __kfifo_init() uses an allocation done by the caller.  We
can't just say "use more elements than the caller allocated", and have
to round down.

The good news? All the normal cases will be using power-of-two arrays
anyway, and most users of kfifo's don't use kfifo_init() at all, but one
of the helper macros to declare a KFIFO that enforce the proper
power-of-two behavior.  But it looks like at least ibmvscsis might be
affected.

The bad news? Will Deacon refers to an old thread and points points out
that the memory ordering in kfifo's is questionable.  See

  https://lore.kernel.org/lkml/20181211034032.32338-1-yuleixzhang@tencent.com/

for more.

Fixes: dfe2a77fd243 ("kfifo: fix kfifo_alloc() and kfifo_init()")
Reported-by: laokz <laokz@foxmail.com>
Cc: Stefani Seibold <stefani@seibold.net>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Greg KH <greg@kroah.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agomm: memcontrol: fix percpu vmstats and vmevents flush
Shakeel Butt [Fri, 30 Aug 2019 23:04:53 +0000 (16:04 -0700)]
mm: memcontrol: fix percpu vmstats and vmevents flush

Instead of using raw_cpu_read() use per_cpu() to read the actual data of
the corresponding cpu otherwise we will be reading the data of the
current cpu for the number of online CPUs.

Link: http://lkml.kernel.org/r/20190829203110.129263-1-shakeelb@google.com
Fixes: bb65f89b7d3d ("mm: memcontrol: flush percpu vmevents before releasing memcg")
Fixes: c350a99ea2b1 ("mm: memcontrol: flush percpu vmstats before releasing memcg")
Signed-off-by: Shakeel Butt <shakeelb@google.com>
Acked-by: Roman Gushchin <guro@fb.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Vladimir Davydov <vdavydov.dev@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>
5 years agomm, memcg: do not set reclaim_state on soft limit reclaim
Michal Hocko [Fri, 30 Aug 2019 23:04:50 +0000 (16:04 -0700)]
mm, memcg: do not set reclaim_state on soft limit reclaim

Adric Blake has noticed[1] the following warning:

  WARNING: CPU: 7 PID: 175 at mm/vmscan.c:245 set_task_reclaim_state+0x1e/0x40
  [...]
  Call Trace:
   mem_cgroup_shrink_node+0x9b/0x1d0
   mem_cgroup_soft_limit_reclaim+0x10c/0x3a0
   balance_pgdat+0x276/0x540
   kswapd+0x200/0x3f0
   ? wait_woken+0x80/0x80
   kthread+0xfd/0x130
   ? balance_pgdat+0x540/0x540
   ? kthread_park+0x80/0x80
   ret_from_fork+0x35/0x40
  ---[ end trace 727343df67b2398a ]---

which tells us that soft limit reclaim is about to overwrite the
reclaim_state configured up in the call chain (kswapd in this case but
the direct reclaim is equally possible).  This means that reclaim stats
would get misleading once the soft reclaim returns and another reclaim
is done.

Fix the warning by dropping set_task_reclaim_state from the soft reclaim
which is always called with reclaim_state set up.

[1] http://lkml.kernel.org/r/CAE1jjeePxYPvw1mw2B3v803xHVR_BNnz0hQUY_JDMN8ny29M6w@mail.gmail.com

Link: http://lkml.kernel.org/r/20190828071808.20410-1-mhocko@kernel.org
Signed-off-by: Michal Hocko <mhocko@suse.com>
Reported-by: Adric Blake <promarbler14@gmail.com>
Acked-by: Yafang Shao <laoar.shao@gmail.com>
Acked-by: Yang Shi <yang.shi@linux.alibaba.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Hillf Danton <hdanton@sina.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agomailmap: add aliases for Dmitry Safonov
Dmitry Safonov [Fri, 30 Aug 2019 23:04:46 +0000 (16:04 -0700)]
mailmap: add aliases for Dmitry Safonov

I don't work for Virtuozzo or Samsung anymore and I've noticed that they
have started sending annoying html email-replies.

And I prioritize my personal emails over work email box, so while at it
add an entry for Arista too - so I can reply faster when needed.

Link: http://lkml.kernel.org/r/20190827220346.11123-1-dima@arista.com
Signed-off-by: Dmitry Safonov <dima@arista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agomm/z3fold.c: fix lock/unlock imbalance in z3fold_page_isolate
Gustavo A. R. Silva [Fri, 30 Aug 2019 23:04:43 +0000 (16:04 -0700)]
mm/z3fold.c: fix lock/unlock imbalance in z3fold_page_isolate

Fix lock/unlock imbalance by unlocking *zhdr* before return.

Addresses Coverity ID 1452811 ("Missing unlock")

Link: http://lkml.kernel.org/r/20190826030634.GA4379@embeddedor
Fixes: d776aaa9895e ("mm/z3fold.c: fix race between migration and destruction")
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Henry Burns <henrywolfeburns@gmail.com>
Cc: Vitaly Wool <vitalywool@gmail.com>
Cc: Shakeel Butt <shakeelb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agomm, memcg: partially revert "mm/memcontrol.c: keep local VM counters in sync with...
Roman Gushchin [Fri, 30 Aug 2019 23:04:39 +0000 (16:04 -0700)]
mm, memcg: partially revert "mm/memcontrol.c: keep local VM counters in sync with the hierarchical ones"

Commit 766a4c19d880 ("mm/memcontrol.c: keep local VM counters in sync
with the hierarchical ones") effectively decreased the precision of
per-memcg vmstats_local and per-memcg-per-node lruvec percpu counters.

That's good for displaying in memory.stat, but brings a serious
regression into the reclaim process.

One issue I've discovered and debugged is the following:
lruvec_lru_size() can return 0 instead of the actual number of pages in
the lru list, preventing the kernel to reclaim last remaining pages.
Result is yet another dying memory cgroups flooding.  The opposite is
also happening: scanning an empty lru list is the waste of cpu time.

Also, inactive_list_is_low() can return incorrect values, preventing the
active lru from being scanned and freed.  It can fail both because the
size of active and inactive lists are inaccurate, and because the number
of workingset refaults isn't precise.  In other words, the result is
pretty random.

I'm not sure, if using the approximate number of slab pages in
count_shadow_number() is acceptable, but issues described above are
enough to partially revert the patch.

Let's keep per-memcg vmstat_local batched (they are only used for
displaying stats to the userspace), but keep lruvec stats precise.  This
change fixes the dead memcg flooding on my setup.

Link: http://lkml.kernel.org/r/20190817004726.2530670-1-guro@fb.com
Fixes: 766a4c19d880 ("mm/memcontrol.c: keep local VM counters in sync with the hierarchical ones")
Signed-off-by: Roman Gushchin <guro@fb.com>
Acked-by: Yafang Shao <laoar.shao@gmail.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agomm/zsmalloc.c: fix build when CONFIG_COMPACTION=n
Andrew Morton [Fri, 30 Aug 2019 23:04:35 +0000 (16:04 -0700)]
mm/zsmalloc.c: fix build when CONFIG_COMPACTION=n

Fixes: 701d678599d0c1 ("mm/zsmalloc.c: fix race condition in zs_destroy_pool")
Link: http://lkml.kernel.org/r/201908251039.5oSbEEUT%25lkp@intel.com
Reported-by: kbuild test robot <lkp@intel.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Henry Burns <henrywolfeburns@gmail.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Jonathan Adams <jwadams@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agomm: memcontrol: flush percpu slab vmstats on kmem offlining
Roman Gushchin [Fri, 30 Aug 2019 23:04:32 +0000 (16:04 -0700)]
mm: memcontrol: flush percpu slab vmstats on kmem offlining

I've noticed that the "slab" value in memory.stat is sometimes 0, even
if some children memory cgroups have a non-zero "slab" value.  The
following investigation showed that this is the result of the kmem_cache
reparenting in combination with the per-cpu batching of slab vmstats.

At the offlining some vmstat value may leave in the percpu cache, not
being propagated upwards by the cgroup hierarchy.  It means that stats
on ancestor levels are lower than actual.  Later when slab pages are
released, the precise number of pages is substracted on the parent
level, making the value negative.  We don't show negative values, 0 is
printed instead.

To fix this issue, let's flush percpu slab memcg and lruvec stats on
memcg offlining.  This guarantees that numbers on all ancestor levels
are accurate and match the actual number of outstanding slab pages.

Link: http://lkml.kernel.org/r/20190819202338.363363-3-guro@fb.com
Fixes: fb2f2b0adb98 ("mm: memcg/slab: reparent memcg kmem_caches on cgroup removal")
Signed-off-by: Roman Gushchin <guro@fb.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agoftrace: Check for successful allocation of hash
Naveen N. Rao [Thu, 4 Jul 2019 14:34:42 +0000 (20:04 +0530)]
ftrace: Check for successful allocation of hash

In register_ftrace_function_probe(), we are not checking the return
value of alloc_and_copy_ftrace_hash(). The subsequent call to
ftrace_match_records() may end up dereferencing the same. Add a check to
ensure this doesn't happen.

Link: http://lkml.kernel.org/r/26e92574f25ad23e7cafa3cf5f7a819de1832cbe.1562249521.git.naveen.n.rao@linux.vnet.ibm.com
Cc: stable@vger.kernel.org
Fixes: 1ec3a81a0cf42 ("ftrace: Have each function probe use its own ftrace_ops")
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
5 years agoftrace: Check for empty hash and comment the race with registering probes
Steven Rostedt (VMware) [Fri, 30 Aug 2019 20:30:01 +0000 (16:30 -0400)]
ftrace: Check for empty hash and comment the race with registering probes

The race between adding a function probe and reading the probes that exist
is very subtle. It needs a comment. Also, the issue can also happen if the
probe has has the EMPTY_HASH as its func_hash.

Cc: stable@vger.kernel.org
Fixes: 7b60f3d876156 ("ftrace: Dynamically create the probe ftrace_ops for the trace_array")
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
5 years agoftrace: Fix NULL pointer dereference in t_probe_next()
Naveen N. Rao [Thu, 4 Jul 2019 14:34:41 +0000 (20:04 +0530)]
ftrace: Fix NULL pointer dereference in t_probe_next()

LTP testsuite on powerpc results in the below crash:

  Unable to handle kernel paging request for data at address 0x00000000
  Faulting instruction address: 0xc00000000029d800
  Oops: Kernel access of bad area, sig: 11 [#1]
  LE SMP NR_CPUS=2048 NUMA PowerNV
  ...
  CPU: 68 PID: 96584 Comm: cat Kdump: loaded Tainted: G        W
  NIP:  c00000000029d800 LR: c00000000029dac4 CTR: c0000000001e6ad0
  REGS: c0002017fae8ba10 TRAP: 0300   Tainted: G        W
  MSR:  9000000000009033 <SF,HV,EE,ME,IR,DR,RI,LE>  CR: 28022422  XER: 20040000
  CFAR: c00000000029d90c DAR: 0000000000000000 DSISR: 40000000 IRQMASK: 0
  ...
  NIP [c00000000029d800] t_probe_next+0x60/0x180
  LR [c00000000029dac4] t_mod_start+0x1a4/0x1f0
  Call Trace:
  [c0002017fae8bc90] [c000000000cdbc40] _cond_resched+0x10/0xb0 (unreliable)
  [c0002017fae8bce0] [c0000000002a15b0] t_start+0xf0/0x1c0
  [c0002017fae8bd30] [c0000000004ec2b4] seq_read+0x184/0x640
  [c0002017fae8bdd0] [c0000000004a57bc] sys_read+0x10c/0x300
  [c0002017fae8be30] [c00000000000b388] system_call+0x5c/0x70

The test (ftrace_set_ftrace_filter.sh) is part of ftrace stress tests
and the crash happens when the test does 'cat
$TRACING_PATH/set_ftrace_filter'.

The address points to the second line below, in t_probe_next(), where
filter_hash is dereferenced:
  hash = iter->probe->ops.func_hash->filter_hash;
  size = 1 << hash->size_bits;

This happens due to a race with register_ftrace_function_probe(). A new
ftrace_func_probe is created and added into the func_probes list in
trace_array under ftrace_lock. However, before initializing the filter,
we drop ftrace_lock, and re-acquire it after acquiring regex_lock. If
another process is trying to read set_ftrace_filter, it will be able to
acquire ftrace_lock during this window and it will end up seeing a NULL
filter_hash.

Fix this by just checking for a NULL filter_hash in t_probe_next(). If
the filter_hash is NULL, then this probe is just being added and we can
simply return from here.

Link: http://lkml.kernel.org/r/05e021f757625cbbb006fad41380323dbe4e3b43.1562249521.git.naveen.n.rao@linux.vnet.ibm.com
Cc: stable@vger.kernel.org
Fixes: 7b60f3d876156 ("ftrace: Dynamically create the probe ftrace_ops for the trace_array")
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
5 years agoMerge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm
Linus Torvalds [Fri, 30 Aug 2019 18:58:02 +0000 (11:58 -0700)]
Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM fixes from Russell King:
 "Three fixes for ARM this time around:

   - A fix for update_sections_early() to cope with NULL ->mm pointers.

   - A correction to the backtrace code to allow proper backtraces.

   - Reinforcement of pfn_valid() with PFNs >= 4GiB"

* tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 8901/1: add a criteria for pfn_valid of arm
  ARM: 8897/1: check stmfd instruction using right shift
  ARM: 8874/1: mm: only adjust sections of valid mm structures

5 years agokeys: ensure that ->match_free() is called in request_key_and_link()
Eric Biggers [Fri, 30 Aug 2019 15:52:26 +0000 (16:52 +0100)]
keys: ensure that ->match_free() is called in request_key_and_link()

If check_cached_key() returns a non-NULL value, we still need to call
key_type::match_free() to undo key_type::match_preparse().

Fixes: 7743c48e54ee ("keys: Cache result of request_key*() temporarily in task_struct")
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
5 years agoMerge tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc
Linus Torvalds [Fri, 30 Aug 2019 17:53:12 +0000 (10:53 -0700)]
Merge tag 'armsoc-fixes' of git://git./linux/kernel/git/soc/soc

Pull ARM SoC fixes from Arnd Bergmann:
 "The majority of the fixes this time are for OMAP hardware, here is a
  breakdown of the significant changes:

  Various device tree bug fixes:
   - TI am57xx boards need a voltage level fix to avoid damaging SD
     cards
   - vf610-bk4 fails to detect its flash due to an incorrect description
   - meson-g12a USB phy configuration fails
   - meson-g12b reboot should not power off the SD card
   - Some corrections for apparently harmless differences from the
     documentation.

  Regression fixes:
   - ams-delta FIQ interrupts broke in 5.3
   - TI am3/am4 mmc controllers broke in 5.2

  The logic_pio driver (used on some Huawei ARM servers) got a few bug
  fixes for reliability.

  And a couple of compile-time warning fixes"

* tag 'armsoc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (26 commits)
  soc: ixp4xx: Protect IXP4xx SoC drivers by ARCH_IXP4XX || COMPILE_TEST
  soc: ti: pm33xx: Make two symbols static
  soc: ti: pm33xx: Fix static checker warnings
  ARM: OMAP: dma: Mark expected switch fall-throughs
  ARM: dts: Fix incomplete dts data for am3 and am4 mmc
  bus: ti-sysc: Simplify cleanup upon failures in sysc_probe()
  ARM: OMAP1: ams-delta-fiq: Fix missing irq_ack
  ARM: dts: dra74x: Fix iodelay configuration for mmc3
  ARM: dts: am335x: Fix UARTs length
  ARM: OMAP2+: Fix omap4 errata warning on other SoCs
  bus: hisi_lpc: Add .remove method to avoid driver unbind crash
  bus: hisi_lpc: Unregister logical PIO range to avoid potential use-after-free
  lib: logic_pio: Add logic_pio_unregister_range()
  lib: logic_pio: Avoid possible overlap for unregistering regions
  lib: logic_pio: Fix RCU usage
  arm64: dts: amlogic: odroid-n2: keep SD card regulator always on
  arm64: dts: meson-g12a-sei510: enable IR controller
  arm64: dts: meson-g12a: add missing dwc2 phy-names
  ARM: dts: vf610-bk4: Fix qspi node description
  ARM: dts: Fix incorrect dcan register mapping for am3, am4 and dra7
  ...

5 years agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma
Linus Torvalds [Fri, 30 Aug 2019 16:23:45 +0000 (09:23 -0700)]
Merge tag 'for-linus' of git://git./linux/kernel/git/rdma/rdma

Pull rdma fix from Doug Ledford:
 "Much calmer week this week.  Just one patch queued up:

  The way the siw driver was locking around the traversal of the list of
  ipv6 addresses on a device was causing a scheduling while atomic
  issue. Bernard straightened it out by using the rtnl_lock"

* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma:
  RDMA/siw: Fix IPv6 addr_list locking

5 years agoMerge tag 'ceph-for-5.3-rc7' of git://github.com/ceph/ceph-client
Linus Torvalds [Fri, 30 Aug 2019 16:09:54 +0000 (09:09 -0700)]
Merge tag 'ceph-for-5.3-rc7' of git://github.com/ceph/ceph-client

Pull two ceph fixes from Ilya Dryomov:
 "A fix for a -rc1 regression in rbd and a trivial static checker fix"

* tag 'ceph-for-5.3-rc7' of git://github.com/ceph/ceph-client:
  rbd: restore zeroing past the overlap when reading from parent
  libceph: don't call crypto_free_sync_skcipher() on a NULL tfm

5 years agoMerge tag 'mmc-v5.3-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc
Linus Torvalds [Fri, 30 Aug 2019 15:32:10 +0000 (08:32 -0700)]
Merge tag 'mmc-v5.3-rc5' of git://git./linux/kernel/git/ulfh/mmc

Pull MMC fixes from Ulf Hansson:
 "MMC core:
   - Fix init of SD cards reporting an invalid VDD range

  MMC host:
   - sprd: Fixes for clocks, card-detect, write-protect etc
   - cadence: Fix ADMA 64-bit addressing
   - tegra: Re-allow writing to SD card when GPIO pin is absent
   - at91: Fix eMMC init by clearing HS200 cap as it's not supported"

* tag 'mmc-v5.3-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc:
  mmc: sdhci-cadence: enable v4_mode to fix ADMA 64-bit addressing
  mmc: sdhci-sprd: clear the UHS-I modes read from registers
  mms: sdhci-sprd: add SDHCI_QUIRK_BROKEN_CARD_DETECTION
  mmc: sdhci-sprd: add SDHCI_QUIRK2_PRESET_VALUE_BROKEN
  mmc: sdhci-sprd: add get_ro hook function
  mmc: sdhci-sprd: fixed incorrect clock divider
  mmc: core: Fix init of SD cards reporting an invalid VDD range
  mmc: sdhci-of-at91: add quirk for broken HS200
  Revert "mmc: sdhci-tegra: drop ->get_ro() implementation"

5 years agoMerge tag 'drm-fixes-2019-08-30' of git://anongit.freedesktop.org/drm/drm
Linus Torvalds [Fri, 30 Aug 2019 15:21:24 +0000 (08:21 -0700)]
Merge tag 'drm-fixes-2019-08-30' of git://anongit.freedesktop.org/drm/drm

Pull drm fixes from Dave Airlie:
 "Nothing too crazy, there's probably more patches than I'd like at this
  stage, but they are all pretty self contained:

  amdgpu:
   - Fix GFXOFF regression for PCO and RV2
   - Fix missing fence reference
   - Fix VG20 power readings on certain SMU firmware versions
   - Fix dpm level setup for VG20
   - Add an ATPX laptop quirk

  i915:
   - Fix DP MST max BPC property creation after DRM register
   - Fix unused ggtt deballooning and NULL dereference in guest
   - Fix DSC eDP transcoder identification
   - Fix WARN from DMA API debug by setting DMA max segment size

  qxl:
   - Make qxl reservel the vga ports using vgaargb to prevent switching to vga compatibility mode.

  omap:
   - Fix omap port lookup for SDI output

  virtio:
   - Use virtio_max_dma_size to fix an issue with swiotlb.

  komeda:
   - Compiler fixes to komeda.
   - Add missing of_node_get() call in komeda.
   - Reorder the komeda de-init functions"

* tag 'drm-fixes-2019-08-30' of git://anongit.freedesktop.org/drm/drm:
  drm/komeda: Reordered the komeda's de-init functions
  drm/amdgpu: fix GFXOFF on Picasso and Raven2
  drm/amdgpu: Add APTX quirk for Dell Latitude 5495
  drm/amd/powerplay: correct Vega20 dpm level related settings
  drm/i915: Call dma_set_max_seg_size() in i915_driver_hw_probe()
  drm/i915/dp: Fix DSC enable code to use cpu_transcoder instead of encoder->type
  drm/i915: Don't deballoon unused ggtt drm_mm_node in linux guest
  drm/i915: Do not create a new max_bpc prop for MST connectors
  drm/powerplay: Fix Vega20 power reading again
  drm/powerplay: Fix Vega20 Average Power value v4
  drm/amdgpu: fix dma_fence_wait without reference
  drm/komeda: Add missing of_node_get() call
  drm/komeda: Clean warning 'komeda_component_add' might be a candidate for 'gnu_printf'
  drm/komeda: Fix warning -Wunused-but-set-variable
  drm/komeda: Fix error: not allocating enough data 1592 vs 1584
  drm/virtio: use virtio_max_dma_size
  drm/omap: Fix port lookup for SDI output
  drm/qxl: get vga ioports

5 years agoi2c: mediatek: disable zero-length transfers for mt8183
Hsin-Yi Wang [Thu, 22 Aug 2019 09:45:17 +0000 (17:45 +0800)]
i2c: mediatek: disable zero-length transfers for mt8183

Quoting from mt8183 datasheet, the number of transfers to be
transferred in one transaction should be set to bigger than 1,
so we should forbid zero-length transfer and update functionality.

Reported-by: Alexandru M Stan <amstan@chromium.org>
Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
Reviewed-by: Qii Wang <qii.wang@mediatek.com>
[wsa: shortened commit message a little]
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
5 years agoi2c: iproc: Stop advertising support of SMBUS quick cmd
Lori Hikichi [Thu, 8 Aug 2019 03:37:52 +0000 (09:07 +0530)]
i2c: iproc: Stop advertising support of SMBUS quick cmd

The driver does not support the SMBUS Quick command so remove the
flag that indicates that level of support.
By default the i2c_detect tool uses the quick command to try and
detect devices at some bus addresses.  If the quick command is used
then we will not detect the device, even though it is present.

Fixes: e6e5dd3566e0 (i2c: iproc: Add Broadcom iProc I2C Driver)
Signed-off-by: Lori Hikichi <lori.hikichi@broadcom.com>
Signed-off-by: Rayagonda Kokatanur <rayagonda.kokatanur@broadcom.com>
Reviewed-by: Ray Jui <ray.jui@broadcom.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
5 years agoMAINTAINERS: i2c mv64xxx: Update documentation path
Denis Efremov [Tue, 13 Aug 2019 06:09:13 +0000 (09:09 +0300)]
MAINTAINERS: i2c mv64xxx: Update documentation path

Update MAINTAINERS record to reflect the file move
from i2c-mv64xxx.txt to marvell,mv64xxx-i2c.yaml.

Fixes: f8bbde72ef44 ("dt-bindings: i2c: mv64xxx: Add YAML schemas")
Signed-off-by: Denis Efremov <efremov@linux.com>
Acked-by: Maxime Ripard <mripard@kernel.org>
Acked-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
5 years agommc: sdhci-cadence: enable v4_mode to fix ADMA 64-bit addressing
Masahiro Yamada [Thu, 29 Aug 2019 10:49:26 +0000 (19:49 +0900)]
mmc: sdhci-cadence: enable v4_mode to fix ADMA 64-bit addressing

The IP datasheet says this controller is compatible with SD Host
Specification Version v4.00.

As it turned out, the ADMA of this IP does not work with 64-bit mode
when it is in the Version 3.00 compatible mode; it understands the
old 64-bit descriptor table (as defined in SDHCI v2), but the ADMA
System Address Register (SDHCI_ADMA_ADDRESS) cannot point to the
64-bit address.

I noticed this issue only after commit bd2e75633c80 ("dma-contiguous:
use fallback alloc_pages for single pages"). Prior to that commit,
dma_set_mask_and_coherent() returned the dma address that fits in
32-bit range, at least for the default arm64 configuration
(arch/arm64/configs/defconfig). Now the host->adma_addr exceeds the
32-bit limit, causing the real problem for the Socionext SoCs.
(As a side-note, I was also able to reproduce the issue for older
kernels by turning off CONFIG_DMA_CMA.)

Call sdhci_enable_v4_mode() to fix this.

Cc: <stable@vger.kernel.org> # v4.20+
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
5 years agommc: sdhci-sprd: clear the UHS-I modes read from registers
Chunyan Zhang [Wed, 28 Aug 2019 02:17:36 +0000 (10:17 +0800)]
mmc: sdhci-sprd: clear the UHS-I modes read from registers

sprd's sd host controller supports SDR50/SDR104/DDR50 though, the UHS-I
mode used by the specific card can be selected via devicetree only.

Fixes: fb8bd90f83c4 ("mmc: sdhci-sprd: Add Spreadtrum's initial host controller")
Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com>
Signed-off-by: Chunyan Zhang <zhang.lyra@gmail.com>
Reviewed-by: Baolin Wang <baolin.wang@linaro.org>
Tested-by: Baolin Wang <baolin.wang@linaro.org>
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
5 years agomms: sdhci-sprd: add SDHCI_QUIRK_BROKEN_CARD_DETECTION
Chunyan Zhang [Wed, 28 Aug 2019 02:17:35 +0000 (10:17 +0800)]
mms: sdhci-sprd: add SDHCI_QUIRK_BROKEN_CARD_DETECTION

sprd's sd host controller doesn't support detection to
card insert or remove.

Fixes: fb8bd90f83c4 ("mmc: sdhci-sprd: Add Spreadtrum's initial host controller")
Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com>
Signed-off-by: Chunyan Zhang <zhang.lyra@gmail.com>
Reviewed-by: Baolin Wang <baolin.wang@linaro.org>
Tested-by: Baolin Wang <baolin.wang@linaro.org>
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
5 years agommc: sdhci-sprd: add SDHCI_QUIRK2_PRESET_VALUE_BROKEN
Chunyan Zhang [Wed, 28 Aug 2019 02:17:34 +0000 (10:17 +0800)]
mmc: sdhci-sprd: add SDHCI_QUIRK2_PRESET_VALUE_BROKEN

The bit of PRESET_VAL_ENABLE in HOST_CONTROL2 register is reserved on
sprd's sd host controller, set quirk2 to disable configuring this.

Fixes: fb8bd90f83c4 ("mmc: sdhci-sprd: Add Spreadtrum's initial host controller")
Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com>
Signed-off-by: Chunyan Zhang <zhang.lyra@gmail.com>
Reviewed-by: Baolin Wang <baolin.wang@linaro.org>
Tested-by: Baolin Wang <baolin.wang@linaro.org>
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
5 years agommc: sdhci-sprd: add get_ro hook function
Chunyan Zhang [Wed, 28 Aug 2019 02:17:33 +0000 (10:17 +0800)]
mmc: sdhci-sprd: add get_ro hook function

sprd's sd host controller doesn't support write protect to sd card.

Fixes: fb8bd90f83c4 ("mmc: sdhci-sprd: Add Spreadtrum's initial host controller")
Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com>
Signed-off-by: Chunyan Zhang <zhang.lyra@gmail.com>
Reviewed-by: Baolin Wang <baolin.wang@linaro.org>
Tested-by: Baolin Wang <baolin.wang@linaro.org>
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
5 years agommc: sdhci-sprd: fixed incorrect clock divider
Chunyan Zhang [Wed, 28 Aug 2019 02:17:32 +0000 (10:17 +0800)]
mmc: sdhci-sprd: fixed incorrect clock divider

The register SDHCI_CLOCK_CONTROL should be cleared before config clock
divider, otherwise the frequency configured maybe lower than we
expected.

Fixes: fb8bd90f83c4 ("mmc: sdhci-sprd: Add Spreadtrum's initial host controller")
Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com>
Signed-off-by: Chunyan Zhang <zhang.lyra@gmail.com>
Reviewed-by: Baolin Wang <baolin.wang@linaro.org>
Tested-by: Baolin Wang <baolin.wang@linaro.org>
Cc: stable@vger.kernel.org
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
5 years agommc: core: Fix init of SD cards reporting an invalid VDD range
Ulf Hansson [Tue, 27 Aug 2019 08:10:43 +0000 (10:10 +0200)]
mmc: core: Fix init of SD cards reporting an invalid VDD range

The OCR register defines the supported range of VDD voltages for SD cards.
However, it has turned out that some SD cards reports an invalid voltage
range, for example having bit7 set.

When a host supports MMC_CAP2_FULL_PWR_CYCLE and some of the voltages from
the invalid VDD range, this triggers the core to run a power cycle of the
card to try to initialize it at the lowest common supported voltage.
Obviously this fails, since the card can't support it.

Let's fix this problem, by clearing invalid bits from the read OCR register
for SD cards, before proceeding with the VDD voltage negotiation.

Cc: stable@vger.kernel.org
Reported-by: Philip Langdale <philipl@overt.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Reviewed-by: Philip Langdale <philipl@overt.org>
Tested-by: Philip Langdale <philipl@overt.org>
Tested-by: Manuel Presnitz <mail@mpy.de>
5 years agoMerge tag 'drm-intel-fixes-2019-08-29' of git://anongit.freedesktop.org/drm/drm-intel...
Dave Airlie [Fri, 30 Aug 2019 00:53:53 +0000 (10:53 +1000)]
Merge tag 'drm-intel-fixes-2019-08-29' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

drm/i915 fixes for v5.3-rc7:
- Fix DP MST max BPC property creation after DRM register
- Fix unused ggtt deballooning and NULL dereference in guest
- Fix DSC eDP transcoder identification
- Fix WARN from DMA API debug by setting DMA max segment size

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/87a7bseati.fsf@intel.com
5 years agoMerge tag 'drm-fixes-5.3-2019-08-28' of git://people.freedesktop.org/~agd5f/linux...
Dave Airlie [Fri, 30 Aug 2019 00:52:06 +0000 (10:52 +1000)]
Merge tag 'drm-fixes-5.3-2019-08-28' of git://people.freedesktop.org/~agd5f/linux into drm-fixes

drm-fixes-5.3-2019-08-28:

amdgpu:
- Fix GFXOFF regression for PCO and RV2
- Fix missing fence reference
- Fix VG20 power readings on certain SMU firmware versions
- Fix dpm level setup for VG20
- Add an ATPX laptop quirk

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexdeucher@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190829022925.32678-1-alexander.deucher@amd.com
5 years agoMerge tag '5.3-rc6-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6
Linus Torvalds [Fri, 30 Aug 2019 00:51:23 +0000 (17:51 -0700)]
Merge tag '5.3-rc6-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6

Pull cifs fixes from Steve French:
 "A few small SMB3 fixes, and a larger one to fix various older string
  handling functions"

* tag '5.3-rc6-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: update internal module number
  cifs: replace various strncpy with strscpy and similar
  cifs: Use kzfree() to zero out the password
  cifs: set domainName when a domain-key is used in multiuser

5 years agoMerge tag 'drm-misc-fixes-2019-08-28' of git://anongit.freedesktop.org/drm/drm-misc...
Dave Airlie [Fri, 30 Aug 2019 00:40:54 +0000 (10:40 +1000)]
Merge tag 'drm-misc-fixes-2019-08-28' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes

drm-misc-fixes for v5.3 (rc7?):
- Make qxl reservel the vga ports using vgaargb to prevent switching to vga compatibility mode.
- Fix omap port lookup for SDI output
- Use virtio_max_dma_size to fix an issue with swiotlb.
- Compiler fixes to komeda.
- Add missing of_node_get() call in komeda.
- Reorder the komeda de-init functions.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/f187c28b-6279-2c4f-3e53-296ee899133b@linux.intel.com
5 years agoi2c: piix4: Fix port selection for AMD Family 16h Model 30h
Andrew Cooks [Fri, 2 Aug 2019 12:52:46 +0000 (14:52 +0200)]
i2c: piix4: Fix port selection for AMD Family 16h Model 30h

Family 16h Model 30h SMBus controller needs the same port selection fix
as described and fixed in commit 0fe16195f891 ("i2c: piix4: Fix SMBus port
selection for AMD Family 17h chips")

commit 6befa3fde65f ("i2c: piix4: Support alternative port selection
register") also fixed the port selection for Hudson2, but unfortunately
this is not the exact same device and the AMD naming and PCI Device IDs
aren't particularly helpful here.

The SMBus port selection register is common to the following Families
and models, as documented in AMD's publicly available BIOS and Kernel
Developer Guides:

 50742 - Family 15h Model 60h-6Fh (PCI_DEVICE_ID_AMD_KERNCZ_SMBUS)
 55072 - Family 15h Model 70h-7Fh (PCI_DEVICE_ID_AMD_KERNCZ_SMBUS)
 52740 - Family 16h Model 30h-3Fh (PCI_DEVICE_ID_AMD_HUDSON2_SMBUS)

The Hudson2 PCI Device ID (PCI_DEVICE_ID_AMD_HUDSON2_SMBUS) is shared
between Bolton FCH and Family 16h Model 30h, but the location of the
SmBus0Sel port selection bits are different:

 51192 - Bolton Register Reference Guide

We distinguish between Bolton and Family 16h Model 30h using the PCI
Revision ID:

  Bolton is device 0x780b, revision 0x15
  Family 16h Model 30h is device 0x780b, revision 0x1F
  Family 15h Model 60h and 70h are both device 0x790b, revision 0x4A.

The following additional public AMD BKDG documents were checked and do
not share the same port selection register:

 42301 - Family 15h Model 00h-0Fh doesn't mention any
 42300 - Family 15h Model 10h-1Fh doesn't mention any
 49125 - Family 15h Model 30h-3Fh doesn't mention any

 48751 - Family 16h Model 00h-0Fh uses the previously supported
         index register SB800_PIIX4_PORT_IDX_ALT at 0x2e

Signed-off-by: Andrew Cooks <andrew.cooks@opengear.com>
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Cc: stable@vger.kernel.org [v4.6+]
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
5 years agoi2c: designware: Synchronize IRQs when unregistering slave client
Jarkko Nikula [Thu, 15 Aug 2019 13:52:11 +0000 (16:52 +0300)]
i2c: designware: Synchronize IRQs when unregistering slave client

Make sure interrupt handler i2c_dw_irq_handler_slave() has finished
before clearing the the dev->slave pointer in i2c_dw_unreg_slave().

There is possibility for a race if i2c_dw_irq_handler_slave() is running
on another CPU while clearing the dev->slave pointer.

Reported-by: Krzysztof Adamski <krzysztof.adamski@nokia.com>
Reported-by: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
5 years agoi2c: i801: Avoid memory leak in check_acpi_smo88xx_device()
Andy Shevchenko [Fri, 16 Aug 2019 13:17:05 +0000 (16:17 +0300)]
i2c: i801: Avoid memory leak in check_acpi_smo88xx_device()

check_acpi_smo88xx_device() utilizes acpi_get_object_info() which in its turn
allocates a buffer. User is responsible to clean allocated resources. The last
has been missed in the original code. Fix it here.

While here, replace !ACPI_SUCCESS() with ACPI_FAILURE().

Fixes: 19b07cb4a187 ("i2c: i801: Register optional lis3lv02d I2C device on Dell machines")
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Pali Rohár <pali.rohar@gmail.com>
Reviewed-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
5 years agoi2c: make i2c_unregister_device() ERR_PTR safe
Wolfram Sang [Mon, 19 Aug 2019 20:48:25 +0000 (22:48 +0200)]
i2c: make i2c_unregister_device() ERR_PTR safe

We are moving towards returning ERR_PTRs when i2c_new_*_device() calls
fail. Make sure its counterpart for unregistering handles ERR_PTRs as
well.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
5 years agoMerge tag 'Wimplicit-fallthrough-5.3-rc7' of git://git.kernel.org/pub/scm/linux/kerne...
Linus Torvalds [Thu, 29 Aug 2019 16:28:25 +0000 (09:28 -0700)]
Merge tag 'Wimplicit-fallthrough-5.3-rc7' of git://git./linux/kernel/git/gustavoars/linux

Pull fallthrough fixes from Gustavo A. R. Silva:
 "Fix fall-through warnings on arc and nds32 for multiple
  configurations"

* tag 'Wimplicit-fallthrough-5.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gustavoars/linux:
  nds32: Mark expected switch fall-throughs
  ARC: unwind: Mark expected switch fall-through

5 years agoMerge tag 'mtd/fixes-for-5.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Thu, 29 Aug 2019 16:09:44 +0000 (09:09 -0700)]
Merge tag 'mtd/fixes-for-5.3-rc7' of git://git./linux/kernel/git/mtd/linux

Pull mtd fix from Miquel Raynal:
 "Add a 'depends on' in the core Hyperbus Kconfig entry to avoid build
  errors"

* tag 'mtd/fixes-for-5.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux:
  mtd: hyperbus: fix dependency and build error

5 years agonds32: Mark expected switch fall-throughs
Gustavo A. R. Silva [Tue, 27 Aug 2019 16:57:07 +0000 (11:57 -0500)]
nds32: Mark expected switch fall-throughs

Mark switch cases where we are expecting to fall through.

This patch fixes the following warnings (Building: allmodconfig nds32):

include/math-emu/soft-fp.h:124:8: warning: this statement may fall through [-Wimplicit-fallthrough=]
arch/nds32/kernel/signal.c:362:20: warning: this statement may fall through [-Wimplicit-fallthrough=]
arch/nds32/kernel/signal.c:315:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
include/math-emu/op-common.h:417:11: warning: this statement may fall through [-Wimplicit-fallthrough=]
include/math-emu/op-common.h:430:11: warning: this statement may fall through [-Wimplicit-fallthrough=]
include/math-emu/op-common.h:310:11: warning: this statement may fall through [-Wimplicit-fallthrough=]
include/math-emu/op-common.h:320:11: warning: this statement may fall through [-Wimplicit-fallthrough=]
include/math-emu/op-common.h:310:11: warning: this statement may fall through [-Wimplicit-fallthrough=]
include/math-emu/op-common.h:320:11: warning: this statement may fall through [-Wimplicit-fallthrough=]
include/math-emu/soft-fp.h:124:8: warning: this statement may fall through [-Wimplicit-fallthrough=]
include/math-emu/op-common.h:417:11: warning: this statement may fall through [-Wimplicit-fallthrough=]
include/math-emu/op-common.h:430:11: warning: this statement may fall through [-Wimplicit-fallthrough=]
include/math-emu/op-common.h:310:11: warning: this statement may fall through [-Wimplicit-fallthrough=]
include/math-emu/op-common.h:320:11: warning: this statement may fall through [-Wimplicit-fallthrough=]
include/math-emu/op-common.h:310:11: warning: this statement may fall through [-Wimplicit-fallthrough=]
include/math-emu/op-common.h:320:11: warning: this statement may fall through [-Wimplicit-fallthrough=]

Reported-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
5 years agoARC: unwind: Mark expected switch fall-through
Gustavo A. R. Silva [Wed, 21 Aug 2019 01:26:44 +0000 (20:26 -0500)]
ARC: unwind: Mark expected switch fall-through

Mark switch cases where we are expecting to fall through.

This patch fixes the following warnings (Building: haps_hs_defconfig arc):

arch/arc/kernel/unwind.c: In function ‘read_pointer’:
./include/linux/compiler.h:328:5: warning: this statement may fall through [-Wimplicit-fallthrough=]
  do {        \
     ^
./include/linux/compiler.h:338:2: note: in expansion of macro ‘__compiletime_assert’
  __compiletime_assert(condition, msg, prefix, suffix)
  ^~~~~~~~~~~~~~~~~~~~
./include/linux/compiler.h:350:2: note: in expansion of macro ‘_compiletime_assert’
  _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__)
  ^~~~~~~~~~~~~~~~~~~
./include/linux/build_bug.h:39:37: note: in expansion of macro ‘compiletime_assert’
 #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
                                     ^~~~~~~~~~~~~~~~~~
./include/linux/build_bug.h:50:2: note: in expansion of macro ‘BUILD_BUG_ON_MSG’
  BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition)
  ^~~~~~~~~~~~~~~~
arch/arc/kernel/unwind.c:573:3: note: in expansion of macro ‘BUILD_BUG_ON’
   BUILD_BUG_ON(sizeof(u32) != sizeof(value));
   ^~~~~~~~~~~~
arch/arc/kernel/unwind.c:575:2: note: here
  case DW_EH_PE_native:
  ^~~~

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
5 years agosoc: ixp4xx: Protect IXP4xx SoC drivers by ARCH_IXP4XX || COMPILE_TEST
Geert Uytterhoeven [Fri, 23 Aug 2019 09:03:52 +0000 (11:03 +0200)]
soc: ixp4xx: Protect IXP4xx SoC drivers by ARCH_IXP4XX || COMPILE_TEST

The move of the IXP4xx SoC drivers exposed their config options on all
platforms.

Fix this by wrapping them inside an ARCH_IXP4XX or COMPILE_TEST block.

Link: https://lore.kernel.org/r/20190823090352.12243-1-linus.walleij@linaro.org
Fixes: fcf2d8978cd538a5 ("ARM: ixp4xx: Move NPE and QMGR to drivers/soc")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
5 years agoMerge tag 'sunxi-fixes-for-5.3-3' of git://git.kernel.org/pub/scm/linux/kernel/git...
Arnd Bergmann [Thu, 29 Aug 2019 15:29:08 +0000 (17:29 +0200)]
Merge tag 'sunxi-fixes-for-5.3-3' of git://git./linux/kernel/git/sunxi/linux into arm/fixes

A single patch to change my MAINTAINERS address

* tag 'sunxi-fixes-for-5.3-3' of git://git.kernel.org/pub/scm/linux/kernel/git/sunxi/linux:
  MAINTAINERS: Update my email address

Link: https://lore.kernel.org/r/8c04a96b-4a75-4e1f-b3ac-05fe091f251e.lettre@localhost
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
5 years agoMerge tag 'hisi-fixes-for-5.3' of git://github.com/hisilicon/linux-hisi into arm...
Arnd Bergmann [Thu, 29 Aug 2019 15:23:51 +0000 (17:23 +0200)]
Merge tag 'hisi-fixes-for-5.3' of git://github.com/hisilicon/linux-hisi into arm/fixes

Hisilicon fixes for v5.3-rc

- Fixed RCU usage in logical PIO
- Added a function to unregister a logical PIO range in logical PIO
  to support the fixes in the hisi-lpc driver
- Fixed and optimized hisi-lpc driver to avoid potential use-after-free
  and driver unbind crash

* tag 'hisi-fixes-for-5.3' of git://github.com/hisilicon/linux-hisi:
  bus: hisi_lpc: Add .remove method to avoid driver unbind crash
  bus: hisi_lpc: Unregister logical PIO range to avoid potential use-after-free
  lib: logic_pio: Add logic_pio_unregister_range()
  lib: logic_pio: Avoid possible overlap for unregistering regions
  lib: logic_pio: Fix RCU usage

Link: https://lore.kernel.org/r/5D562335.7000902@hisilicon.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
5 years agomtd: hyperbus: fix dependency and build error
Randy Dunlap [Tue, 13 Aug 2019 23:03:13 +0000 (16:03 -0700)]
mtd: hyperbus: fix dependency and build error

lib/devres.c, which implements devm_ioremap_resource(), is only built
when CONFIG_HAS_IOMEM is set/enabled, so MTD_HYPERBUS should depend
on HAS_IOMEM.  Fixes a build error and a Kconfig warning (as seen on
UML builds):

WARNING: unmet direct dependencies detected for MTD_COMPLEX_MAPPINGS
  Depends on [n]: MTD [=m] && HAS_IOMEM [=n]
  Selected by [m]:
  - MTD_HYPERBUS [=m] && MTD [=m]

ERROR: "devm_ioremap_resource" [drivers/mtd/hyperbus/hyperbus-core.ko] undefined!

Fixes: dcc7d3446a0f ("mtd: Add support for HyperBus memory devices")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Vignesh Raghavendra <vigneshr@ti.com>
Cc: Miquel Raynal <miquel.raynal@bootlin.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: linux-mtd@lists.infradead.org
Acked-by: Vignesh Raghavendra <vigneshr@ti.com>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
5 years agoARM: 8901/1: add a criteria for pfn_valid of arm
zhaoyang [Mon, 26 Aug 2019 03:07:37 +0000 (04:07 +0100)]
ARM: 8901/1: add a criteria for pfn_valid of arm

pfn_valid can be wrong when parsing a invalid pfn whose phys address
exceeds BITS_PER_LONG as the MSB will be trimed when shifted.

The issue originally arise from bellowing call stack, which corresponding to
an access of the /proc/kpageflags from userspace with a invalid pfn parameter
and leads to kernel panic.

[46886.723249] c7 [<c031ff98>] (stable_page_flags) from [<c03203f8>]
[46886.723264] c7 [<c0320368>] (kpageflags_read) from [<c0312030>]
[46886.723280] c7 [<c0311fb0>] (proc_reg_read) from [<c02a6e6c>]
[46886.723290] c7 [<c02a6e24>] (__vfs_read) from [<c02a7018>]
[46886.723301] c7 [<c02a6f74>] (vfs_read) from [<c02a778c>]
[46886.723315] c7 [<c02a770c>] (SyS_pread64) from [<c0108620>]
(ret_fast_syscall+0x0/0x28)

Signed-off-by: Zhaoyang Huang <zhaoyang.huang@unisoc.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
5 years agoRISC-V: Fix FIXMAP area corruption on RV32 systems
Anup Patel [Mon, 19 Aug 2019 05:14:23 +0000 (05:14 +0000)]
RISC-V: Fix FIXMAP area corruption on RV32 systems

Currently, various virtual memory areas of Linux RISC-V are organized
in increasing order of their virtual addresses is as follows:
1. User space area (This is lowest area and starts at 0x0)
2. FIXMAP area
3. VMALLOC area
4. Kernel area (This is highest area and starts at PAGE_OFFSET)

The maximum size of user space aread is represented by TASK_SIZE.

On RV32 systems, TASK_SIZE is defined as VMALLOC_START which causes the
user space area to overlap the FIXMAP area. This allows user space apps
to potentially corrupt the FIXMAP area and kernel OF APIs will crash
whenever they access corrupted FDT in the FIXMAP area.

On RV64 systems, TASK_SIZE is set to fixed 256GB and no other areas
happen to overlap so we don't see any FIXMAP area corruptions.

This patch fixes FIXMAP area corruption on RV32 systems by setting
TASK_SIZE to FIXADDR_START. We also move FIXADDR_TOP, FIXADDR_SIZE,
and FIXADDR_START defines to asm/pgtable.h so that we can avoid cyclic
header includes.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Tested-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Paul Walmsley <paul.walmsley@sifive.com>
5 years agoMerge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Linus Torvalds [Wed, 28 Aug 2019 17:37:21 +0000 (10:37 -0700)]
Merge tag 'arm64-fixes' of git://git./linux/kernel/git/arm64/linux

Pull arm64 fixes from Will Deacon:
 "Hot on the heels of our last set of fixes are a few more for -rc7.

  Two of them are fixing issues with our virtual interrupt controller
  implementation in KVM/arm, while the other is a longstanding but
  straightforward kallsyms fix which was been acked by Masami and
  resolves an initialisation failure in kprobes observed on arm64.

   - Fix GICv2 emulation bug (KVM)

   - Fix deadlock in virtual GIC interrupt injection code (KVM)

   - Fix kprobes blacklist init failure due to broken kallsyms lookup"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  KVM: arm/arm64: vgic-v2: Handle SGI bits in GICD_I{S,C}PENDR0 as WI
  KVM: arm/arm64: vgic: Fix potential deadlock when ap_list is long
  kallsyms: Don't let kallsyms_lookup_size_offset() fail on retrieving the first symbol

5 years agodrm/komeda: Reordered the komeda's de-init functions
Ayan Kumar Halder [Wed, 28 Aug 2019 15:00:19 +0000 (15:00 +0000)]
drm/komeda: Reordered the komeda's de-init functions

The de-init routine should be doing the following in order:-
1. Unregister the drm device
2. Shut down the crtcs - failing to do this might cause a connector leakage
See the 'commit 109c4d18e574 ("drm/arm/malidp: Ensure that the crtcs are
shutdown before removing any encoder/connector")'
3. Disable the interrupts
4. Unbind the components
5. Free up DRM mode_config info

Changes from v1:-
1. Re-ordered the header files inclusion
2. Rebased on top of the latest drm-misc-fixes

Signed-off-by:. Ayan Kumar Halder <Ayan.Halder@arm.com>
Reviewed-by: Mihail Atanassov <mihail.atanassov@arm.com>
Reviewed-by: James Qian Wang (Arm Technology China) <james.qian.wang@arm.com>
Link: https://patchwork.freedesktop.org/patch/327606/
5 years agoRDMA/siw: Fix IPv6 addr_list locking
Bernard Metzler [Wed, 28 Aug 2019 13:03:55 +0000 (15:03 +0200)]
RDMA/siw: Fix IPv6 addr_list locking

Walking the address list of an inet6_dev requires
appropriate locking. Since the called function
siw_listen_address() may sleep, we have to use
rtnl_lock() instead of read_lock_bh().

Also introduces sanity checks if we got a device
from in_dev_get() or in6_dev_get().

Reported-by: Bart Van Assche <bvanassche@acm.org>
Fixes: 6c52fdc244b5 ("rdma/siw: connection management")
Signed-off-by: Bernard Metzler <bmt@zurich.ibm.com>
Link: https://lore.kernel.org/r/20190828130355.22830-1-bmt@zurich.ibm.com
Signed-off-by: Doug Ledford <dledford@redhat.com>
5 years agorbd: restore zeroing past the overlap when reading from parent
Ilya Dryomov [Tue, 27 Aug 2019 14:45:10 +0000 (16:45 +0200)]
rbd: restore zeroing past the overlap when reading from parent

The parent image is read only up to the overlap point, the rest of
the buffer should be zeroed.  This snuck in because as it turns out
the overlap test case has not been triggering this code path for
a while now.

Fixes: a9b67e69949d ("rbd: replace obj_req->tried_parent with obj_req->read_state")
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Jason Dillaman <dillaman@redhat.com>
5 years agolibceph: don't call crypto_free_sync_skcipher() on a NULL tfm
Jia-Ju Bai [Wed, 24 Jul 2019 09:43:06 +0000 (17:43 +0800)]
libceph: don't call crypto_free_sync_skcipher() on a NULL tfm

In set_secret(), key->tfm is assigned to NULL on line 55, and then
ceph_crypto_key_destroy(key) is executed.

ceph_crypto_key_destroy(key)
  crypto_free_sync_skcipher(key->tfm)
    crypto_free_skcipher(&tfm->base);

This happens to work because crypto_sync_skcipher is a trivial wrapper
around crypto_skcipher: &tfm->base is still 0 and crypto_free_skcipher()
handles that.  Let's not rely on the layout of crypto_sync_skcipher.

This bug is found by a static analysis tool STCheck written by us.

Fixes: 69d6302b65a8 ("libceph: Remove VLA usage of skcipher").
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
5 years agoKVM: arm/arm64: vgic-v2: Handle SGI bits in GICD_I{S,C}PENDR0 as WI
Marc Zyngier [Wed, 28 Aug 2019 10:10:16 +0000 (11:10 +0100)]
KVM: arm/arm64: vgic-v2: Handle SGI bits in GICD_I{S,C}PENDR0 as WI

A guest is not allowed to inject a SGI (or clear its pending state)
by writing to GICD_ISPENDR0 (resp. GICD_ICPENDR0), as these bits are
defined as WI (as per ARM IHI 0048B 4.3.7 and 4.3.8).

Make sure we correctly emulate the architecture.

Fixes: 96b298000db4 ("KVM: arm/arm64: vgic-new: Add PENDING registers handlers")
Cc: stable@vger.kernel.org # 4.7+
Reported-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>
5 years agocifs: update internal module number
Steve French [Tue, 27 Aug 2019 22:29:56 +0000 (17:29 -0500)]
cifs: update internal module number

To 2.22

Signed-off-by: Steve French <stfrench@microsoft.com>
5 years agocifs: replace various strncpy with strscpy and similar
Ronnie Sahlberg [Mon, 26 Aug 2019 23:30:14 +0000 (09:30 +1000)]
cifs: replace various strncpy with strscpy and similar

Using strscpy is cleaner, and avoids some problems with
handling maximum length strings.  Linus noticed the
original problem and Aurelien pointed out some additional
problems. Fortunately most of this is SMB1 code (and
in particular the ASCII string handling older, which
is less common).

Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
5 years agocifs: Use kzfree() to zero out the password
Dan Carpenter [Tue, 27 Aug 2019 10:59:17 +0000 (13:59 +0300)]
cifs: Use kzfree() to zero out the password

It's safer to zero out the password so that it can never be disclosed.

Fixes: 0c219f5799c7 ("cifs: set domainName when a domain-key is used in multiuser")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
5 years agocifs: set domainName when a domain-key is used in multiuser
Ronnie Sahlberg [Wed, 21 Aug 2019 22:09:50 +0000 (08:09 +1000)]
cifs: set domainName when a domain-key is used in multiuser

RHBZ: 1710429

When we use a domain-key to authenticate using multiuser we must also set
the domainnmame for the new volume as it will be used and passed to the server
in the NTLMSSP Domain-name.

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
5 years agoMerge tag 'nfs-for-5.3-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Linus Torvalds [Tue, 27 Aug 2019 20:22:57 +0000 (13:22 -0700)]
Merge tag 'nfs-for-5.3-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client bugfixes from Trond Myklebust:
 "Highlights include:

  Stable fixes:

   - Fix a page lock leak in nfs_pageio_resend()

   - Ensure O_DIRECT reports an error if the bytes read/written is 0

   - Don't handle errors if the bind/connect succeeded

   - Revert "NFSv4/flexfiles: Abort I/O early if the layout segment was
     invalidat ed"

  Bugfixes:

   - Don't refresh attributes with mounted-on-file information

   - Fix return values for nfs4_file_open() and nfs_finish_open()

   - Fix pnfs layoutstats reporting of I/O errors

   - Don't use soft RPC calls for pNFS/flexfiles I/O, and don't abort
     for soft I/O errors when the user specifies a hard mount.

   - Various fixes to the error handling in sunrpc

   - Don't report writepage()/writepages() errors twice"

* tag 'nfs-for-5.3-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
  NFS: remove set but not used variable 'mapping'
  NFSv2: Fix write regression
  NFSv2: Fix eof handling
  NFS: Fix writepage(s) error handling to not report errors twice
  NFS: Fix spurious EIO read errors
  pNFS/flexfiles: Don't time out requests on hard mounts
  SUNRPC: Handle connection breakages correctly in call_status()
  Revert "NFSv4/flexfiles: Abort I/O early if the layout segment was invalidated"
  SUNRPC: Handle EADDRINUSE and ENOBUFS correctly
  pNFS/flexfiles: Turn off soft RPC calls
  SUNRPC: Don't handle errors if the bind/connect succeeded
  NFS: On fatal writeback errors, we need to call nfs_inode_remove_request()
  NFS: Fix initialisation of I/O result struct in nfs_pgio_rpcsetup
  NFS: Ensure O_DIRECT reports an error if the bytes read/written is 0
  NFSv4/pnfs: Fix a page lock leak in nfs_pageio_resend()
  NFSv4: Fix return value in nfs_finish_open()
  NFSv4: Fix return values for nfs4_file_open()
  NFS: Don't refresh attributes with mounted-on-file information

5 years agoKVM: x86: Don't update RIP or do single-step on faulting emulation
Sean Christopherson [Fri, 23 Aug 2019 20:55:44 +0000 (13:55 -0700)]
KVM: x86: Don't update RIP or do single-step on faulting emulation

Don't advance RIP or inject a single-step #DB if emulation signals a
fault.  This logic applies to all state updates that are conditional on
clean retirement of the emulation instruction, e.g. updating RFLAGS was
previously handled by commit 38827dbd3fb85 ("KVM: x86: Do not update
EFLAGS on faulting emulation").

Not advancing RIP is likely a nop, i.e. ctxt->eip isn't updated with
ctxt->_eip until emulation "retires" anyways.  Skipping #DB injection
fixes a bug reported by Andy Lutomirski where a #UD on SYSCALL due to
invalid state with EFLAGS.TF=1 would loop indefinitely due to emulation
overwriting the #UD with #DB and thus restarting the bad SYSCALL over
and over.

Cc: Nadav Amit <nadav.amit@gmail.com>
Cc: stable@vger.kernel.org
Reported-by: Andy Lutomirski <luto@kernel.org>
Fixes: 663f4c61b803 ("KVM: x86: handle singlestep during emulation")
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
5 years agoKVM: x86: hyper-v: don't crash on KVM_GET_SUPPORTED_HV_CPUID when kvm_intel.nested...
Vitaly Kuznetsov [Tue, 27 Aug 2019 16:04:02 +0000 (18:04 +0200)]
KVM: x86: hyper-v: don't crash on KVM_GET_SUPPORTED_HV_CPUID when kvm_intel.nested is disabled

If kvm_intel is loaded with nested=0 parameter an attempt to perform
KVM_GET_SUPPORTED_HV_CPUID results in OOPS as nested_get_evmcs_version hook
in kvm_x86_ops is NULL (we assign it in nested_vmx_hardware_setup() and
this only happens in case nested is enabled).

Check that kvm_x86_ops->nested_get_evmcs_version is not NULL before
calling it. With this, we can remove the stub from svm as it is no
longer needed.

Cc: <stable@vger.kernel.org>
Fixes: e2e871ab2f02 ("x86/kvm/hyper-v: Introduce nested_get_evmcs_version() helper")
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
5 years agoMerge tag 'arc-5.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc
Linus Torvalds [Tue, 27 Aug 2019 17:50:27 +0000 (10:50 -0700)]
Merge tag 'arc-5.3-rc7' of git://git./linux/kernel/git/vgupta/arc

Pull ARC updates from Vineet Gupta:

 - support for Edge Triggered IRQs in ARC IDU intc

 - other fixes here and there

* tag 'arc-5.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
  arc: prefer __section from compiler_attributes.h
  dt-bindings: IDU-intc: Add support for edge-triggered interrupts
  dt-bindings: IDU-intc: Clean up documentation
  ARCv2: IDU-intc: Add support for edge-triggered interrupts
  ARC: unwind: Mark expected switch fall-throughs
  ARC: [plat-hsdk]: allow to switch between AXI DMAC port configurations
  ARC: fix typo in setup_dma_ops log message
  ARCv2: entry: early return from exception need not clear U & DE bits

5 years agoMerge tag 'mfd-fixes-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd
Linus Torvalds [Tue, 27 Aug 2019 17:47:01 +0000 (10:47 -0700)]
Merge tag 'mfd-fixes-5.3' of git://git./linux/kernel/git/lee/mfd

Pull MFD fix from Lee Jones:
 "Identify potentially unused functions in rk808 driver when !PM"

* tag 'mfd-fixes-5.3' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd:
  mfd: rk808: Make PM function declaration static
  mfd: rk808: Mark pm functions __maybe_unused

5 years agoMerge tag 'sound-5.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai...
Linus Torvalds [Tue, 27 Aug 2019 17:42:03 +0000 (10:42 -0700)]
Merge tag 'sound-5.3-rc7' of git://git./linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "A collection of small fixes as usual:

   - More coverage of USB-audio descriptor sanity checks

   - A fix for mute LED regression on Conexant HD-audio codecs

   - A few device-specific fixes and quirks for USB-audio and HD-audio

   - A fix for (die-hard remaining) possible race in sequencer core

   - FireWire oxfw regression fix that was introduced in 5.3-rc1"

* tag 'sound-5.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: oxfw: fix to handle correct stream for PCM playback
  ALSA: seq: Fix potential concurrent access to the deleted pool
  ALSA: usb-audio: Check mixer unit bitmap yet more strictly
  ALSA: line6: Fix memory leak at line6_init_pcm() error path
  ALSA: usb-audio: Fix invalid NULL check in snd_emuusb_set_samplerate()
  ALSA: hda/ca0132 - Add new SBZ quirk
  ALSA: usb-audio: Add implicit fb quirk for Behringer UFX1604
  ALSA: hda - Fixes inverted Conexant GPIO mic mute led

5 years agodrm/amdgpu: fix GFXOFF on Picasso and Raven2
Aaron Liu [Tue, 27 Aug 2019 14:59:45 +0000 (22:59 +0800)]
drm/amdgpu: fix GFXOFF on Picasso and Raven2

For picasso(adev->pdev->device == 0x15d8)&raven2(adev->rev_id >= 0x8),
firmware is sufficient to support gfxoff.
In commit 98f58ada2d37e, for picasso&raven2,
return directly and cause gfxoff disabled.

Fixes: 98f58ada2d37 ("drm/amdgpu/gfx9: update pg_flags after determining if gfx off is possible")
Reviewed-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Aaron Liu <aaron.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
5 years agodrm/amdgpu: Add APTX quirk for Dell Latitude 5495
Kai-Heng Feng [Tue, 27 Aug 2019 09:33:32 +0000 (17:33 +0800)]
drm/amdgpu: Add APTX quirk for Dell Latitude 5495

Needs ATPX rather than _PR3 to really turn off the dGPU. This can save
~5W when dGPU is runtime-suspended.

Signed-off-by: Kai-Heng Feng <kai.heng.feng@canonical.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
5 years agodrm/amd/powerplay: correct Vega20 dpm level related settings
Evan Quan [Mon, 19 Aug 2019 05:17:53 +0000 (13:17 +0800)]
drm/amd/powerplay: correct Vega20 dpm level related settings

Correct the settings for auto mode and skip the unnecessary
settings for dcefclk and fclk.

Signed-off-by: Evan Quan <evan.quan@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
5 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Linus Torvalds [Tue, 27 Aug 2019 17:12:48 +0000 (10:12 -0700)]
Merge git://git./linux/kernel/git/netdev/net

Pull networking fixes from David Miller:

 1) Use 32-bit index for tails calls in s390 bpf JIT, from Ilya
    Leoshkevich.

 2) Fix missed EPOLLOUT events in TCP, from Eric Dumazet. Same fix for
    SMC from Jason Baron.

 3) ipv6_mc_may_pull() should return 0 for malformed packets, not
    -EINVAL. From Stefano Brivio.

 4) Don't forget to unpin umem xdp pages in error path of
    xdp_umem_reg(). From Ivan Khoronzhuk.

 5) Fix sta object leak in mac80211, from Johannes Berg.

 6) Fix regression by not configuring PHYLINK on CPU port of bcm_sf2
    switches. From Florian Fainelli.

 7) Revert DMA sync removal from r8169 which was causing regressions on
    some MIPS Loongson platforms. From Heiner Kallweit.

 8) Use after free in flow dissector, from Jakub Sitnicki.

 9) Fix NULL derefs of net devices during ICMP processing across
    collect_md tunnels, from Hangbin Liu.

10) proto_register() memory leaks, from Zhang Lin.

11) Set NLM_F_MULTI flag in multipart netlink messages consistently,
    from John Fastabend.

* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (66 commits)
  r8152: Set memory to all 0xFFs on failed reg reads
  openvswitch: Fix conntrack cache with timeout
  ipv4: mpls: fix mpls_xmit for iptunnel
  nexthop: Fix nexthop_num_path for blackhole nexthops
  net: rds: add service level support in rds-info
  net: route dump netlink NLM_F_MULTI flag missing
  s390/qeth: reject oversized SNMP requests
  sock: fix potential memory leak in proto_register()
  MAINTAINERS: Add phylink keyword to SFF/SFP/SFP+ MODULE SUPPORT
  xfrm/xfrm_policy: fix dst dev null pointer dereference in collect_md mode
  ipv4/icmp: fix rt dst dev null pointer dereference
  openvswitch: Fix log message in ovs conntrack
  bpf: allow narrow loads of some sk_reuseport_md fields with offset > 0
  bpf: fix use after free in prog symbol exposure
  bpf: fix precision tracking in presence of bpf2bpf calls
  flow_dissector: Fix potential use-after-free on BPF_PROG_DETACH
  Revert "r8169: remove not needed call to dma_sync_single_for_device"
  ipv6: propagate ipv6_add_dev's error returns out of ipv6_find_idev
  net/ncsi: Fix the payload copying for the request coming from Netlink
  qed: Add cleanup in qed_slowpath_start()
  ...

5 years agoKVM: arm/arm64: vgic: Fix potential deadlock when ap_list is long
Heyi Guo [Tue, 27 Aug 2019 11:26:50 +0000 (12:26 +0100)]
KVM: arm/arm64: vgic: Fix potential deadlock when ap_list is long

If the ap_list is longer than 256 entries, merge_final() in list_sort()
will call the comparison callback with the same element twice, causing
a deadlock in vgic_irq_cmp().

Fix it by returning early when irqa == irqb.

Cc: stable@vger.kernel.org # 4.7+
Fixes: 8e4447457965 ("KVM: arm/arm64: vgic-new: Add IRQ sorting")
Signed-off-by: Zenghui Yu <yuzenghui@huawei.com>
Signed-off-by: Heyi Guo <guoheyi@huawei.com>
[maz: massaged commit log and patch, added Fixes and Cc-stable]
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>
5 years agokallsyms: Don't let kallsyms_lookup_size_offset() fail on retrieving the first symbol
Marc Zyngier [Sat, 24 Aug 2019 13:12:31 +0000 (14:12 +0100)]
kallsyms: Don't let kallsyms_lookup_size_offset() fail on retrieving the first symbol

An arm64 kernel configured with

  CONFIG_KPROBES=y
  CONFIG_KALLSYMS=y
  # CONFIG_KALLSYMS_ALL is not set
  CONFIG_KALLSYMS_BASE_RELATIVE=y

reports the following kprobe failure:

  [    0.032677] kprobes: failed to populate blacklist: -22
  [    0.033376] Please take care of using kprobes.

It appears that kprobe fails to retrieve the symbol at address
0xffff000010081000, despite this symbol being in System.map:

  ffff000010081000 T __exception_text_start

This symbol is part of the first group of aliases in the
kallsyms_offsets array (symbol names generated using ugly hacks in
scripts/kallsyms.c):

  kallsyms_offsets:
          .long   0x1000 // do_undefinstr
          .long   0x1000 // efi_header_end
          .long   0x1000 // _stext
          .long   0x1000 // __exception_text_start
          .long   0x12b0 // do_cp15instr

Looking at the implementation of get_symbol_pos(), it returns the
lowest index for aliasing symbols. In this case, it return 0.

But kallsyms_lookup_size_offset() considers 0 as a failure, which
is obviously wrong (there is definitely a valid symbol living there).
In turn, the kprobe blacklisting stops abruptly, hence the original
error.

A CONFIG_KALLSYMS_ALL kernel wouldn't fail as there is always
some random symbols at the beginning of this array, which are never
looked up via kallsyms_lookup_size_offset.

Fix it by considering that get_symbol_pos() is always successful
(which is consistent with the other uses of this function).

Fixes: ffc5089196446 ("[PATCH] Create kallsyms_lookup_size_offset()")
Reviewed-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>
5 years agoNFS: remove set but not used variable 'mapping'
YueHaibing [Tue, 27 Aug 2019 07:16:36 +0000 (15:16 +0800)]
NFS: remove set but not used variable 'mapping'

Fixes gcc '-Wunused-but-set-variable' warning:

fs/nfs/write.c: In function nfs_page_async_flush:
fs/nfs/write.c:609:24: warning: variable mapping set but not used [-Wunused-but-set-variable]

It is not use since commit aefb623c422e ("NFS: Fix
writepage(s) error handling to not report errors twice")

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
5 years agoNFSv2: Fix write regression
Trond Myklebust [Tue, 27 Aug 2019 11:03:28 +0000 (07:03 -0400)]
NFSv2: Fix write regression

Ensure we update the write result count on success, since the
RPC call itself does not do so.

Reported-by: Jan Stancek <jstancek@redhat.com>
Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Tested-by: Jan Stancek <jstancek@redhat.com>
5 years agoNFSv2: Fix eof handling
Trond Myklebust [Tue, 27 Aug 2019 00:41:16 +0000 (20:41 -0400)]
NFSv2: Fix eof handling

If we received a reply from the server with a zero length read and
no error, then that implies we are at eof.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
5 years agoMerge tag 'kvm-ppc-fixes-5.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git...
Radim Krčmář [Tue, 27 Aug 2019 12:46:17 +0000 (14:46 +0200)]
Merge tag 'kvm-ppc-fixes-5.3-1' of git://git./linux/kernel/git/paulus/powerpc

KVM/PPC fix for 5.3

- Fix bug which could leave locks locked in the host on return
  to a guest.

5 years agomfd: rk808: Make PM function declaration static
Lee Jones [Tue, 27 Aug 2019 06:39:50 +0000 (07:39 +0100)]
mfd: rk808: Make PM function declaration static

Avoids:
  ../drivers/mfd/rk808.c:771:1: warning: symbol 'rk8xx_pm_ops' \
    was not declared. Should it be static?

Fixes: 5752bc4373b2 ("mfd: rk808: Mark pm functions __maybe_unused")
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
5 years agodrm/i915: Call dma_set_max_seg_size() in i915_driver_hw_probe()
Lyude Paul [Fri, 23 Aug 2019 20:52:51 +0000 (16:52 -0400)]
drm/i915: Call dma_set_max_seg_size() in i915_driver_hw_probe()

Currently, we don't call dma_set_max_seg_size() for i915 because we
intentionally do not limit the segment length that the device supports.
However, this results in a warning being emitted if we try to map
anything larger than SZ_64K on a kernel with CONFIG_DMA_API_DEBUG_SG
enabled:

[    7.751926] DMA-API: i915 0000:00:02.0: mapping sg segment longer
than device claims to support [len=98304] [max=65536]
[    7.751934] WARNING: CPU: 5 PID: 474 at kernel/dma/debug.c:1220
debug_dma_map_sg+0x20f/0x340

This was originally brought up on
https://bugs.freedesktop.org/show_bug.cgi?id=108517 , and the consensus
there was it wasn't really useful to set a limit (and that dma-debug
isn't really all that useful for i915 in the first place). Unfortunately
though, CONFIG_DMA_API_DEBUG_SG is enabled in the debug configs for
various distro kernels. Since a WARN_ON() will disable automatic problem
reporting (and cause any CI with said option enabled to start
complaining), we really should just fix the problem.

Note that as me and Chris Wilson discussed, the other solution for this
would be to make DMA-API not make such assumptions when a driver hasn't
explicitly set a maximum segment size. But, taking a look at the commit
which originally introduced this behavior, commit 78c47830a5cb
("dma-debug: check scatterlist segments"), there is an explicit mention
of this assumption and how it applies to devices with no segment size:

Conversely, devices which are less limited than the rather
conservative defaults, or indeed have no limitations at all
(e.g. GPUs with their own internal MMU), should be encouraged to
set appropriate dma_parms, as they may get more efficient DMA
mapping performance out of it.

So unless there's any concerns (I'm open to discussion!), let's just
follow suite and call dma_set_max_seg_size() with UINT_MAX as our limit
to silence any warnings.

Changes since v3:
* Drop patch for enabling CONFIG_DMA_API_DEBUG_SG in CI. It looks like
  just turning it on causes the kernel to spit out bogus WARN_ONs()
  during some igt tests which would otherwise require teaching igt to
  disable the various DMA-API debugging options causing this. This is
  too much work to be worth it, since DMA-API debugging is useless for
  us. So, we'll just settle with this single patch to squelch WARN_ONs()
  during driver load for users that have CONFIG_DMA_API_DEBUG_SG turned
  on for some reason.
* Move dma_set_max_seg_size() call into i915_driver_hw_probe() - Chris
  Wilson

Signed-off-by: Lyude Paul <lyude@redhat.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: <stable@vger.kernel.org> # v4.18+
Link: https://patchwork.freedesktop.org/patch/msgid/20190823205251.14298-1-lyude@redhat.com
(cherry picked from commit acd674af95d3f627062007429b9c195c6b32361d)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
5 years agodrm/i915/dp: Fix DSC enable code to use cpu_transcoder instead of encoder->type
Manasi Navare [Wed, 21 Aug 2019 21:59:50 +0000 (14:59 -0700)]
drm/i915/dp: Fix DSC enable code to use cpu_transcoder instead of encoder->type

This patch fixes the intel_configure_pps_for_dsc_encoder() function to use
cpu_transcoder instead of encoder->type to select the correct DSC registers
that was wrongly used in the original patch for one DSC register isntance.

Fixes: 7182414e2530 ("drm/i915/dp: Configure i915 Picture parameter Set registers during DSC enabling")
Cc: Ville Syrjala <ville.syrjala@linux.intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Jani Nikula <jani.nikula@linux.intel.com>
Cc: <stable@vger.kernel.org> # v5.0+
Signed-off-by: Manasi Navare <manasi.d.navare@intel.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190821215950.24223-1-manasi.d.navare@intel.com
(cherry picked from commit d4c61c4a16decd8ace8660f22c81609a539fccba)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
5 years agodrm/i915: Don't deballoon unused ggtt drm_mm_node in linux guest
Xiong Zhang [Tue, 20 Aug 2019 05:46:17 +0000 (13:46 +0800)]
drm/i915: Don't deballoon unused ggtt drm_mm_node in linux guest

The following call trace may exist in linux guest dmesg when guest i915
driver is unloaded.
[   90.776610] [drm:vgt_deballoon_space.isra.0 [i915]] deballoon space: range [0x0 - 0x0] 0 KiB.
[   90.776621] BUG: unable to handle kernel NULL pointer dereference at 00000000000000c0
[   90.776691] IP: drm_mm_remove_node+0x4d/0x320 [drm]
[   90.776718] PGD 800000012c7d0067 P4D 800000012c7d0067 PUD 138e4c067 PMD 0
[   90.777091] task: ffff9adab60f2f00 task.stack: ffffaf39c0fe0000
[   90.777142] RIP: 0010:drm_mm_remove_node+0x4d/0x320 [drm]
[   90.777573] Call Trace:
[   90.777653]  intel_vgt_deballoon+0x4c/0x60 [i915]
[   90.777729]  i915_ggtt_cleanup_hw+0x121/0x190 [i915]
[   90.777792]  i915_driver_unload+0x145/0x180 [i915]
[   90.777856]  i915_pci_remove+0x15/0x20 [i915]
[   90.777890]  pci_device_remove+0x3b/0xc0
[   90.777916]  device_release_driver_internal+0x157/0x220
[   90.777945]  driver_detach+0x39/0x70
[   90.777967]  bus_remove_driver+0x51/0xd0
[   90.777990]  pci_unregister_driver+0x23/0x90
[   90.778019]  SyS_delete_module+0x1da/0x240
[   90.778045]  entry_SYSCALL_64_fastpath+0x24/0x87
[   90.778072] RIP: 0033:0x7f34312af067
[   90.778092] RSP: 002b:00007ffdea3da0d8 EFLAGS: 00000206
[   90.778297] RIP: drm_mm_remove_node+0x4d/0x320 [drm] RSP: ffffaf39c0fe3dc0
[   90.778344] ---[ end trace f4b1bc8305fc59dd ]---

Four drm_mm_node are used to reserve guest ggtt space, but some of them
may be skipped and not initialised due to space constraints in
intel_vgt_balloon(). If drm_mm_remove_node() is called with
uninitialized drm_mm_node, the above call trace occurs.

This patch check drm_mm_node's validity before calling
drm_mm_remove_node().

Fixes: ff8f797557c7("drm/i915: return the correct usable aperture size under gvt environment")
Cc: stable@vger.kernel.org
Signed-off-by: Xiong Zhang <xiong.y.zhang@intel.com>
Acked-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/1566279978-9659-1-git-send-email-xiong.y.zhang@intel.com
(cherry picked from commit 4776f3529d6b1e47f02904ad1d264d25ea22b27b)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
5 years agodrm/i915: Do not create a new max_bpc prop for MST connectors
Ville Syrjälä [Tue, 20 Aug 2019 16:16:57 +0000 (19:16 +0300)]
drm/i915: Do not create a new max_bpc prop for MST connectors

We're not allowed to create new properties after device registration
so for MST connectors we need to either create the max_bpc property
earlier, or we reuse one we already have. Let's do the latter apporach
since the corresponding SST connector already has the prop and its
min/max are correct also for the MST connector.

The problem was highlighted by commit 4f5368b5541a ("drm/kms:
Catch mode_object lifetime errors") which results in the following
spew:
[ 1330.878941] WARNING: CPU: 2 PID: 1554 at drivers/gpu/drm/drm_mode_object.c:45 __drm_mode_object_add+0xa0/0xb0 [drm]
...
[ 1330.879008] Call Trace:
[ 1330.879023]  drm_property_create+0xba/0x180 [drm]
[ 1330.879036]  drm_property_create_range+0x15/0x30 [drm]
[ 1330.879048]  drm_connector_attach_max_bpc_property+0x62/0x80 [drm]
[ 1330.879086]  intel_dp_add_mst_connector+0x11f/0x140 [i915]
[ 1330.879094]  drm_dp_add_port.isra.20+0x20b/0x440 [drm_kms_helper]
...

Cc: stable@vger.kernel.org
Cc: Lyude Paul <lyude@redhat.com>
Cc: sunpeng.li@amd.com
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Sean Paul <sean@poorly.run>
Fixes: 5ca0ef8a56b8 ("drm/i915: Add max_bpc property for DP MST")
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190820161657.9658-1-ville.syrjala@linux.intel.com
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
(cherry picked from commit 1b9bd09630d4db4827cc04d358a41a16a6bc2cb0)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
5 years agomfd: rk808: Mark pm functions __maybe_unused
Arnd Bergmann [Mon, 8 Jul 2019 12:53:02 +0000 (14:53 +0200)]
mfd: rk808: Mark pm functions __maybe_unused

The newly added suspend/resume functions are only used if CONFIG_PM
is enabled:

drivers/mfd/rk808.c:752:12: error: 'rk8xx_resume' defined but not used [-Werror=unused-function]
drivers/mfd/rk808.c:732:12: error: 'rk8xx_suspend' defined but not used [-Werror=unused-function]

Mark them as __maybe_unused so the compiler can silently drop them
when they are not needed.

Fixes: 586c1b4125b3 ("mfd: rk808: Add RK817 and RK809 support")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
5 years agoKVM: PPC: Book3S: Fix incorrect guest-to-user-translation error handling
Alexey Kardashevskiy [Mon, 26 Aug 2019 04:55:20 +0000 (14:55 +1000)]
KVM: PPC: Book3S: Fix incorrect guest-to-user-translation error handling

H_PUT_TCE_INDIRECT handlers receive a page with up to 512 TCEs from
a guest. Although we verify correctness of TCEs before we do anything
with the existing tables, there is a small window when a check in
kvmppc_tce_validate might pass and right after that the guest alters
the page of TCEs, causing an early exit from the handler and leaving
srcu_read_lock(&vcpu->kvm->srcu) (virtual mode) or lock_rmap(rmap)
(real mode) locked.

This fixes the bug by jumping to the common exit code with an appropriate
unlock.

Cc: stable@vger.kernel.org # v4.11+
Fixes: 121f80ba68f1 ("KVM: PPC: VFIO: Add in-kernel acceleration for VFIO")
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
5 years agodrm/powerplay: Fix Vega20 power reading again
Kent Russell [Fri, 23 Aug 2019 13:13:18 +0000 (09:13 -0400)]
drm/powerplay: Fix Vega20 power reading again

For the 40.46 SMU release, they changed CurrSocketPower to
AverageSocketPower, but this was changed back in 40.47 so just check if
it's 40.46 and make the appropriate change

Tested with 40.45, 40.46 and 40.47 successfully

Signed-off-by: Kent Russell <kent.russell@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
5 years agodrm/powerplay: Fix Vega20 Average Power value v4
Kent Russell [Thu, 22 Aug 2019 12:17:40 +0000 (08:17 -0400)]
drm/powerplay: Fix Vega20 Average Power value v4

The SMU changed reading from CurrSocketPower to AverageSocketPower, so
reflect this accordingly. This fixes the issue where Average Power
Consumption was being reported as 0 from SMU 40.46-onward

v2: Fixed headline prefix
v3: Add check for SMU version for proper compatibility
v4: Style fix

Signed-off-by: Kent Russell <kent.russell@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
5 years agodrm/amdgpu: fix dma_fence_wait without reference
Christian König [Fri, 16 Aug 2019 12:56:35 +0000 (14:56 +0200)]
drm/amdgpu: fix dma_fence_wait without reference

We need to grab a reference to the fence we wait for.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
5 years agoNFS: Fix writepage(s) error handling to not report errors twice
Trond Myklebust [Sat, 24 Aug 2019 14:39:00 +0000 (10:39 -0400)]
NFS: Fix writepage(s) error handling to not report errors twice

If writepage()/writepages() saw an error, but handled it without
reporting it, we should not be re-reporting that error on exit.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
5 years agoNFS: Fix spurious EIO read errors
Trond Myklebust [Thu, 15 Aug 2019 16:26:05 +0000 (12:26 -0400)]
NFS: Fix spurious EIO read errors

If the client attempts to read a page, but the read fails due to some
spurious error (e.g. an ACCESS error or a timeout, ...) then we need
to allow other processes to retry.
Also try to report errors correctly when doing a synchronous readpage.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
5 years agopNFS/flexfiles: Don't time out requests on hard mounts
Trond Myklebust [Fri, 23 Aug 2019 12:37:50 +0000 (08:37 -0400)]
pNFS/flexfiles: Don't time out requests on hard mounts

If the mount is hard, we should ignore the 'io_maxretrans' module
parameter so that we always keep retrying.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
5 years agoSUNRPC: Handle connection breakages correctly in call_status()
Trond Myklebust [Fri, 16 Aug 2019 12:58:48 +0000 (08:58 -0400)]
SUNRPC: Handle connection breakages correctly in call_status()

If the connection breaks while we're waiting for a reply from the
server, then we want to immediately try to reconnect.

Fixes: ec6017d90359 ("SUNRPC fix regression in umount of a secure mount")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
5 years agoRevert "NFSv4/flexfiles: Abort I/O early if the layout segment was invalidated"
Trond Myklebust [Fri, 16 Aug 2019 12:37:26 +0000 (08:37 -0400)]
Revert "NFSv4/flexfiles: Abort I/O early if the layout segment was invalidated"

This reverts commit a79f194aa4879e9baad118c3f8bb2ca24dbef765.
The mechanism for aborting I/O is racy, since we are not guaranteed that
the request is asleep while we're changing both task->tk_status and
task->tk_action.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Cc: stable@vger.kernel.org # v5.1
5 years agoSUNRPC: Handle EADDRINUSE and ENOBUFS correctly
Trond Myklebust [Fri, 16 Aug 2019 02:55:19 +0000 (22:55 -0400)]
SUNRPC: Handle EADDRINUSE and ENOBUFS correctly

If a connect or bind attempt returns EADDRINUSE, that means we want to
retry with a different port. It is not a fatal connection error.
Similarly, ENOBUFS is not fatal, but just indicates a memory allocation
issue. Retry after a short delay.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
5 years agopNFS/flexfiles: Turn off soft RPC calls
Trond Myklebust [Fri, 16 Aug 2019 00:18:48 +0000 (20:18 -0400)]
pNFS/flexfiles: Turn off soft RPC calls

The pNFS/flexfiles I/O requests are sent with the SOFTCONN flag set, so
they automatically time out if the connection breaks. It should
therefore not be necessary to have the soft flag set in addition.

Fixes: 5f01d9539496 ("nfs41: create NFSv3 DS connection if specified")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
5 years agoSUNRPC: Don't handle errors if the bind/connect succeeded
Trond Myklebust [Thu, 15 Aug 2019 21:26:17 +0000 (17:26 -0400)]
SUNRPC: Don't handle errors if the bind/connect succeeded

Don't handle errors in call_bind_status()/call_connect_status()
if it turns out that a previous call caused it to succeed.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Cc: stable@vger.kernel.org # v5.1+