Commit graph

507927 commits

Author SHA1 Message Date
Tyler Baker
52dd5576cd selftest/memfd: enable cross compilation
Use the CC variable instead of hard coding gcc. Also clean up the compiler
options by creating a CFLAGS variable.

Signed-off-by: Tyler Baker <tyler.baker@linaro.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
2015-04-02 12:40:34 -06:00
Linus Torvalds
0a4812798f Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dma
Pull dmaengine fixes from Vinod Koul:
 "This time we have addition of caps for jz4740 which fixes intentional
  warning at boot.  Then we have memory leak issues in drivers using
  virt-dma by Peter on few drive"

* 'fixes' of git://git.infradead.org/users/vkoul/slave-dma:
  dmaengine: moxart-dma: Fix memory leak when stopping a running transfer
  dmaengine: bcm2835-dma: Fix memory leak when stopping a running transfer
  dmaengine: omap-dma: Fix memory leak when terminating running transfer
  dmaengine: edma: fix memory leak when terminating running transfers
  dmaengine: jz4740: Define capabilities
2015-04-02 11:30:36 -07:00
Linus Torvalds
8172ba51e2 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller:

 1) Fix use-after-free with mac80211 RX A-MPDU reorder timer, from
    Johannes Berg.

 2) iwlwifi leaks memory every module load/unload cycles, fix from Larry
    Finger.

 3) Need to use for_each_netdev_safe() in rtnl_group_changelink()
    otherwise we can crash, from WANG Cong.

 4) mlx4 driver does register_netdev() too early in the probe sequence,
    from Ido Shamay.

 5) Don't allow router discovery hop limit to decrease the interface's
    hop limit, from D.S. Ljungmark.

 6) tx_packets and tx_bytes improperly accounted for certain classes of
    USB network devices, fix from Ben Hutchings.

 7) ip{6}mr_rules_init() mistakenly use plain kfree to release the ipmr
    tables in the error path, they must instead use ip{6}mr_free_table().
    Fix from WANG Cong.

 8) cxgb4 doesn't properly quiesce all RX activity before unregistering
    the netdevice.  Fix from Hariprasad Shenai.

 9) Fix hash corruptions in ipvlan driver, from Jiri Benc.

10) nla_memcpy(), like a real memcpy, should fully initialize the
    destination buffer, even if the source attribute is smaller.  Fix
    from Jiri Benc.

11) Fix wrong error code returned from iucv_sock_sendmsg().  We should
    use whatever sock_alloc_send_skb() put into 'err'.  From Eugene
    Crosser.

12) Fix slab object leak on module unload in TIPC, from Ying Xue.

13) Need a READ_ONCE() when reading the cached RX socket route in
    tcp_v{4,6}_early_demux().  From Michal Kubecek.

14) Still too many problems with TPC support in the ath9k driver, so
    disable it for now.  From Felix Fietkau.

15) When in AP mode the rtlwifi driver can leak DMA mappings, fix from
    Larry Finger.

16) Missing kzalloc() failure check in gs_usb CAN driver, from Colin Ian
    King.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (52 commits)
  cxgb4: Fix to dump devlog, even if FW is crashed
  cxgb4: Firmware macro changes for fw verison 1.13.32.0
  bnx2x: Fix kdump when iommu=on
  bnx2x: Fix kdump on 4-port device
  mac80211: fix RX A-MPDU session reorder timer deletion
  MAINTAINERS: Update Intel Wired Ethernet Driver info
  tipc: fix a slab object leak
  net/usb/r8152: add device id for Lenovo TP USB 3.0 Ethernet
  af_iucv: fix AF_IUCV sendmsg() errno
  openvswitch: Return vport module ref before destruction
  netlink: pad nla_memcpy dest buffer with zeroes
  bonding: Bonding Overriding Configuration logic restored.
  ipvlan: fix check for IP addresses in control path
  ipvlan: do not use rcu operations for address list
  ipvlan: protect against concurrent link removal
  ipvlan: fix addr hash list corruption
  net: fec: setup right value for mdio hold time
  net: tcp6: fix double call of tcp_v6_fill_cb()
  cxgb4vf: Fix sparse warnings
  netns: don't clear nsid too early on removal
  ...
2015-04-02 11:09:41 -07:00
Shachar Raindel
8494057ab5 IB/uverbs: Prevent integer overflow in ib_umem_get address arithmetic
Properly verify that the resulting page aligned end address is larger
than both the start address and the length of the memory area requested.

Both the start and length arguments for ib_umem_get are controlled by
the user. A misbehaving user can provide values which will cause an
integer overflow when calculating the page aligned end address.

This overflow can cause also miscalculation of the number of pages
mapped, and additional logic issues.

Addresses: CVE-2014-8159
Cc: <stable@vger.kernel.org>
Signed-off-by: Shachar Raindel <raindel@mellanox.com>
Signed-off-by: Jack Morgenstein <jackm@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
2015-04-02 09:53:59 -07:00
John Stultz
48fd77d144 kselftests: timers: Make set-timer-lat fail more gracefully for !CAP_WAKE_ALARM
The set-timer-lat test fails when testing CLOCK_BOOTTIME_ALARM
or CLOCK_REALTIME_ALARM when the user isn't running as root or
with CAP_WAKE_ALARM.

So this patch improves the error checking so we report the
issue more clearly and continue rather then reporting a failure.

Cc: Shuah Khan <shuahkh@osg.samsung.com>
Cc: Prarit Bhargava <prarit@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
2015-04-02 10:32:33 -06:00
Peter Zijlstra
3650b57fdf timer: Further simplify the SMP and HOTPLUG logic
Remove one CONFIG_HOTPLUG_CPU #ifdef in trade for introducing one
CONFIG_SMP #ifdef.

The CONFIG_SMP ifdef avoids declaring the per-CPU __tvec_bases storage
on UP systems since they already have boot_tvec_bases.

Also (re)add a runtime check on the base alignment -- for the paranoid
amongst us :-)

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/fdd2d35e169bdc554ffa3fe77f77716298c75ada.1427814611.git.viresh.kumar@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-04-02 17:46:21 +02:00
Viresh Kumar
8def906044 timer: Don't initialize 'tvec_base' on hotplug
There is no need to call init_timers_cpu() on every CPU hotplug event,
there is not much we need to reset.

 - Timer-lists are already empty at the end of migrate_timers().
 - timer_jiffies will be refreshed while adding a new timer, after the
   CPU is online again.
 - active_timers and all_timers can be reset from migrate_timers().

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/54a1c30ea7b805af55beb220cadf5a07a21b0a4d.1427814611.git.viresh.kumar@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-04-02 17:46:01 +02:00
Peter Zijlstra
b337a9380f timer: Allocate per-cpu tvec_base's statically
Memory for the 'tvec_base' array is allocated separately for the boot CPU (statically)
and non-boot CPUs (dynamically).

The reason is because __TIMER_INITIALIZER() needs to set ->base to a
valid pointer (because we've made NULL special, hint: lock_timer_base())
and we cannot get a compile time pointer to per-cpu entries because we
don't know where we'll map the section, even for the boot cpu.

This can be simplified a bit by statically allocating per-cpu memory.
The only disadvantage is that memory for one of the structures will stay
unused, i.e. for the boot CPU, which uses boot_tvec_bases.

This will also guarantee that tvec_base is cacheline aligned. Even
though tvec_base has ____cacheline_aligned stuck on, kzalloc_node() does
not actually respect that (but guarantees a minimum u64 alignment).

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/17cdf560f2727f687ab159707d0aa591f8a2f82d.1427814611.git.viresh.kumar@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-04-02 17:46:00 +02:00
Wanpeng Li
fa9c9d10e9 sched/deadline: Support DL task migration during CPU hotplug
I observed that DL tasks can't be migrated to other CPUs during CPU
hotplug, in addition, task may/may not be running again if CPU is
added back.

The root cause which I found is that DL tasks will be throtted and
removed from the DL rq after comsuming all their budget, which
leads to the situation that stop task can't pick them up from the
DL rq and migrate them to other CPUs during hotplug.

The method to reproduce:

  schedtool -E -t 50000:100000 -e ./test

Actually './test' is just a simple for loop. Then observe which CPU the
test task is on and offline it:

  echo 0 > /sys/devices/system/cpu/cpuN/online

This patch adds the DL task migration during CPU hotplug by finding a
most suitable later deadline rq after DL timer fires if current rq is
offline.

If it fails to find a suitable later deadline rq then it falls back to
any eligible online CPU in so that the deadline task will come back
to us, and the push/pull mechanism should then move it around properly.

Suggested-and-Acked-by: Juri Lelli <juri.lelli@arm.com>
Signed-off-by: Wanpeng Li <wanpeng.li@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1427411315-4298-1-git-send-email-wanpeng.li@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-04-02 17:42:57 +02:00
Juri Lelli
3c18d447b3 sched/core: Check for available DL bandwidth in cpuset_cpu_inactive()
Hotplug operations are destructive w.r.t. cpusets. In case such an
operation is performed on a CPU belonging to an exlusive cpuset, the
DL bandwidth information associated with the corresponding root
domain is gone even if the operation fails (in sched_cpu_inactive()).

For this reason we need to move the check we currently have in
sched_cpu_inactive() to cpuset_cpu_inactive() to prevent useless
cpusets reconfiguration in the CPU_DOWN_FAILED path.

Signed-off-by: Juri Lelli <juri.lelli@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Juri Lelli <juri.lelli@gmail.com>
Link: http://lkml.kernel.org/r/1427792017-7356-2-git-send-email-juri.lelli@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-04-02 17:42:56 +02:00
Juri Lelli
4cd57f9713 sched/deadline: Always enqueue on previous rq when dl_task_timer() fires
dl_task_timer() may fire on a different rq from where a task was removed
after throttling. Since the call path is:

  dl_task_timer() ->
    enqueue_task_dl() ->
      enqueue_dl_entity() ->
        replenish_dl_entity()

and replenish_dl_entity() uses dl_se's rq, we can't use current's rq
in dl_task_timer(), but we need to lock the task's previous one.

Tested-by: Wanpeng Li <wanpeng.li@linux.intel.com>
Signed-off-by: Juri Lelli <juri.lelli@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Kirill Tkhai <ktkhai@parallels.com>
Cc: Juri Lelli <juri.lelli@gmail.com>
Fixes: 3960c8c0c7 ("sched: Make dl_task_time() use task_rq_lock()")
Link: http://lkml.kernel.org/r/1427792017-7356-1-git-send-email-juri.lelli@arm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-04-02 17:42:56 +02:00
Abel Vesa
07c54f7a7f sched/core: Remove unused argument from init_[rt|dl]_rq()
Obviously, 'rq' is not used in these two functions, therefore,
there is no reason for it to be passed as an argument.

Signed-off-by: Abel Vesa <abelvesa@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1425383427-26244-1-git-send-email-abelvesa@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-04-02 17:42:55 +02:00
Andi Kleen
c420f19b9c perf/x86/intel: Fix Haswell CYCLE_ACTIVITY.* counter constraints
Some of the CYCLE_ACTIVITY.* events can only be scheduled on
counter 2.  Due to a typo Haswell matched those with
INTEL_EVENT_CONSTRAINT, which lead to the events never
matching as the comparison does not expect anything
in the umask too. Fix the typo.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1425925222-32361-1-git-send-email-andi@firstfloor.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-04-02 17:07:43 +02:00
Kan Liang
687805e4a6 perf/x86/intel: Filter branches for PEBS event
For supporting Intel LBR branches filtering, Intel LBR sharing logic
mechanism is introduced from commit b36817e886 ("perf/x86: Add Intel
LBR sharing logic"). It modifies __intel_shared_reg_get_constraints() to
config lbr_sel, which is finally used to set LBR_SELECT.

However, the intel_shared_regs_constraints() function is called after
intel_pebs_constraints(). The PEBS event will return immediately after
intel_pebs_constraints(). So it's impossible to filter branches for PEBS
events.

This patch moves intel_shared_regs_constraints() ahead of
intel_pebs_constraints().

We can safely do that because the intel_shared_regs_constraints() function
only returns empty constraint if its rejecting the event, otherwise it
returns NULL such that we continue calling intel_pebs_constraints() and
x86_get_event_constraint().

Signed-off-by: Kan Liang <kan.liang@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: eranian@google.com
Link: http://lkml.kernel.org/r/1427467105-9260-1-git-send-email-kan.liang@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-04-02 17:07:42 +02:00
Christian König
22e2e86560 drm/radeon: fix wait in radeon_mn_invalidate_range_start
We need to wait for all fences, not just the exclusive one.

Signed-off-by: Christian König <christian.koenig@amd.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2015-04-02 10:03:29 -04:00
Christian König
863653fed0 drm/radeon: add extra check in radeon_ttm_tt_unpin_userptr
We somehow try to free the SG table twice.

Bugs: https://bugs.freedesktop.org/show_bug.cgi?id=89734

Signed-off-by: Christian König <christian.koenig@amd.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
2015-04-02 10:03:29 -04:00
Daniel Stone
adacb228d7 drm: Exynos: Respect framebuffer pitch for FIMD/Mixer
When performing a modeset, use the framebuffer pitch value to set FIMD
IMG_SIZE and Mixer SPAN registers. These are both defined as pitch - the
distance between contiguous lines (bytes for FIMD, pixels for mixer).

Fixes display on Snow (1366x768).

Signed-off-by: Daniel Stone <daniels@collabora.com>
Tested-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
2015-04-02 22:37:13 +09:00
Preeti U Murthy
345527b1ed clockevents: Fix cpu_down() race for hrtimer based broadcasting
It was found when doing a hotplug stress test on POWER, that the
machine either hit softlockups or rcu_sched stall warnings.  The
issue was traced to commit:

  7cba160ad7 ("powernv/cpuidle: Redesign idle states management")

which exposed the cpu_down() race with hrtimer based broadcast mode:

  5d1638acb9 ("tick: Introduce hrtimer based broadcast")

The race is the following:

Assume CPU1 is the CPU which holds the hrtimer broadcasting duty
before it is taken down.

	CPU0					CPU1

	cpu_down()				take_cpu_down()
						disable_interrupts()

	cpu_die()

	while (CPU1 != CPU_DEAD) {
		msleep(100);
		switch_to_idle();
		stop_cpu_timer();
		schedule_broadcast();
	}

	tick_cleanup_cpu_dead()
		take_over_broadcast()

So after CPU1 disabled interrupts it cannot handle the broadcast
hrtimer anymore, so CPU0 will be stuck forever.

Fix this by explicitly taking over broadcast duty before cpu_die().

This is a temporary workaround. What we really want is a callback
in the clockevent device which allows us to do that from the dying
CPU by pushing the hrtimer onto a different cpu. That might involve
an IPI and is definitely more complex than this immediate fix.

Changelog was picked up from:

    https://lkml.org/lkml/2015/2/16/213

Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Preeti U. Murthy <preeti@linux.vnet.ibm.com>
Cc: linuxppc-dev@lists.ozlabs.org
Cc: mpe@ellerman.id.au
Cc: nicolas.pitre@linaro.org
Cc: peterz@infradead.org
Cc: rjw@rjwysocki.net
Fixes: http://linuxppc.10917.n7.nabble.com/offlining-cpus-breakage-td88619.html
Link: http://lkml.kernel.org/r/20150330092410.24979.59887.stgit@preeti.in.ibm.com
[ Merged it to the latest timer tree, renamed the callback, tidied up the changelog. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-04-02 14:25:39 +02:00
Sakari Ailus
4879785ed5 [media] vb2: Fix dma_dir setting for dma-contig mem type
The last argument of vb2_dc_get_user_pages() is of type enum
dma_data_direction, but the caller, vb2_dc_get_userptr() passes a value
which is the result of comparison dma_dir == DMA_FROM_DEVICE. This results
in the write parameter to get_user_pages() being zero in all cases, i.e.
that the caller has no intent to write there.

This was broken by patch "vb2: replace 'write' by 'dma_dir'".

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Cc: stable@vger.kernel.org  # for v3.19
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
2015-04-02 08:56:26 -03:00
Bryan O'Donoghue
a6fcb6d480 x86/intel/quark: Run IMR self-test on IMR capble hw only
Automated testing with LKP shows IMR self test code running and
printing error messages on QEMU hardware lacking IMR support.

Update IMR self-test code to run only when IMR hardware should
be present. Tested on Quark X1000 and QEMU.

Signed-off-by: Bryan O'Donoghue <pure.logic@nexus-software.ie>
Acked-by: Ong Boon Leong <boon.leong.ong@intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: andriy.shevchenko@intel.com
Cc: dvhart@linux.intel.com
Cc: huang.ying.caritas@gmail.com
Cc: ying.huang@intel.com
Link: http://lkml.kernel.org/r/1427800536-32339-1-git-send-email-pure.logic@nexus-software.ie
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-04-02 12:47:50 +02:00
Ingo Molnar
9eed56e889 clockevents: Clean up clockchips.h
Do various cleanups on the clockchips.h file:

 - indent preprocessor blocks to make it more clear which block we are in,
   this also makes merge resolution easier

 - comment larger preprocessor blocks consistently, using the:

     #if FOO
     ...
     #else /* !FOO: */
     ...
     #endif /* !FOO */

   notation.

 - unbreak lines

 - etc.

No change in functionality.

Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-04-02 12:18:12 +02:00
Boris Ostrovsky
3f85483bd8 x86/cpu: Factor out common CPU initialization code, fix 32-bit Xen PV guests
Some of x86 bare-metal and Xen CPU initialization code is common
between the two and therefore can be factored out to avoid code
duplication.

As a side effect, doing so will also extend the fix provided by
commit a7fcf28d43 ("x86/asm/entry: Replace this_cpu_sp0() with
current_top_of_stack() to x86_32") to 32-bit Xen PV guests.

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: David Vrabel <david.vrabel@citrix.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: konrad.wilk@oracle.com
Cc: xen-devel@lists.xenproject.org
Link: http://lkml.kernel.org/r/1427897534-5086-1-git-send-email-boris.ostrovsky@oracle.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-04-02 12:06:41 +02:00
Denys Vlasenko
40e4f2d177 x86/asm/boot/64: Use __BOOT_TSS instead of literal $0x20
__BOOT_TSS = (GDT_ENTRY_BOOT_TSS * 8)
GDT_ENTRY_BOOT_TSS = (GDT_ENTRY_BOOT_CS + 2)
GDT_ENTRY_BOOT_CS = 2

(2 + 2) * 8 = 4 * 8 = 32 = 0x20

No code changes.

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
Reviewed-by: Steven Rostedt <rostedt@goodmis.org>
Acked-by: Borislav Petkov <bp@suse.de>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Will Drewry <wad@chromium.org>
Link: http://lkml.kernel.org/r/1427899858-7165-2-git-send-email-dvlasenk@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-04-02 12:00:20 +02:00
Denys Vlasenko
0784b36448 x86/asm/entry/64: Fold the 'test_in_nmi' macro into its only user
No code changes.

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
Acked-by: Borislav Petkov <bp@suse.de>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Will Drewry <wad@chromium.org>
Link: http://lkml.kernel.org/r/1427899858-7165-1-git-send-email-dvlasenk@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-04-02 12:00:10 +02:00
Steffen Liebergeld
f59df35fc2 kgdb/x86: Fix reporting of 'si' in kgdb on x86_64
This patch fixes an error in kgdb for x86_64 which would report
the value of dx when asked to give the value of si.

Signed-off-by: Steffen Liebergeld <steffen.liebergeld@kernkonzept.com>
Cc: Jason Wessel <jason.wessel@windriver.com>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-04-02 11:32:16 +02:00
Ingo Molnar
3ae7a93916 tick: Further simplify tick-internal.h
Move the broadcasting related section to the GENERIC_CLOCKEVENTS=y
section - this also solves build failures on architectures that
don't use generic clockevents yet.

Also standardize include file style to make it easier to read, and
use nesting depth aware preprocessor directives to make future merges
easier.

Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-04-02 11:26:35 +02:00
Andy Lutomirski
7ea2416909 x86/asm/entry/64: Disable opportunistic SYSRET if regs->flags has TF set
When I wrote the opportunistic SYSRET code, I missed an important difference
between SYSRET and IRET.

Both instructions are capable of setting EFLAGS.TF, but they behave differently
when doing so:

 - IRET will not issue a #DB trap after execution when it sets TF.
   This is critical -- otherwise you'd never be able to make forward progress when
   returning to userspace.

 - SYSRET, on the other hand, will trap with #DB immediately after
   returning to CPL3, and the next instruction will never execute.

This breaks anything that opportunistically SYSRETs to a user
context with TF set.  For example, running this code with TF set
and a SIGTRAP handler loaded never gets past 'post_nop':

	extern unsigned char post_nop[];
	asm volatile ("pushfq\n\t"
		      "popq %%r11\n\t"
		      "nop\n\t"
		      "post_nop:"
		      : : "c" (post_nop) : "r11");

In my defense, I can't find this documented in the AMD or Intel manual.

Fix it by using IRET to restore TF.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Borislav Petkov <bp@suse.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: 2a23c6b8a9 ("x86_64, entry: Use sysret to return to userspace when possible")
Link: http://lkml.kernel.org/r/9472f1ca4c19a38ecda45bba9c91b7168135fcfa.1427923514.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-04-02 11:09:54 +02:00
Ville Syrjälä
840a1cf0cd drm/i915: Reject the colorkey ioctls for primary and cursor planes
The legcy colorkey ioctls are only implemented for sprite planes, so
reject the ioctl for primary/cursor planes. If we want to support
colorkeying with these planes (assuming we have hw support of course)
we should just move ahead with the colorkey property conversion.

Testcase: kms_legacy_colorkey
Cc: Tommi Rantala <tt.rantala@gmail.com>
Cc: stable@vger.kernel.org
Reference: http://mid.gmane.org/CA+ydwtr+bCo7LJ44JFmUkVRx144UDFgOS+aJTfK6KHtvBDVuAw@mail.gmail.com
Reported-and-tested-by: Tommi Rantala <tt.rantala@gmail.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
2015-04-02 11:25:50 +03:00
Andy Grover
86d65dc4fe target: Allow userspace to write 1 to attrib/emulate_fua_write
Before 4.0, reading attrib/emulate_fua_write has returned 1. Saved
configs created on a pre-4.0 kernel will try to write that back when
restoring LIO configuration. This should succeed with no effect,
and issue a warning.

See https://bugzilla.redhat.com/show_bug.cgi?id=1206184

Reported-by: Yanko Kaneti <yaneti@declera.com>
Reported-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Andy Grover <agrover@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
2015-04-01 21:42:51 -07:00
David S. Miller
f5f321c431 iwlwifi:
* fix a memory leak, we leaked memory each time the module
   was loaded.
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Merge tag 'wireless-drivers-for-davem-2015-04-01' of git://git.kernel.org/pub/scm/linux/kernel/git/kvalo/wireless-drivers

Kalle Valo says:

====================
iwlwifi:

* fix a memory leak, we leaked memory each time the module
  was loaded.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2015-04-01 14:48:50 -04:00
David S. Miller
877e45d60c Merge branch 'cxgb4-net'
Hariprasad Shenai says:

====================
cxgb4 FW macro changes for new FW

Fix to dump device log even in the case of firmware crash. Also
incorporates changes for new FW.

This patch series has been created against net tree and includes patches on
cxgb4 driver.

We have included all the maintainers of respective drivers. Kindly review the
change and let us know in case of any review comments.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2015-04-01 14:47:21 -04:00
Hariprasad Shenai
ae469b68a5 cxgb4: Fix to dump devlog, even if FW is crashed
Add new Common Code routines to retrieve Firmware Device Log
parameters from PCIE_FW_PF[7]. The firmware initializes its Device Log very
early on and stores the parameters for its location/size in that register.
Using the parameters from the register allows us to access the Firmware
Device Log even when the firmware crashes very early on or we're not
attached to the firmware

Based on original work by Casey Leedom <leedom@chelsio.com>

Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-04-01 14:47:20 -04:00
Hariprasad Shenai
7ef65a4211 cxgb4: Firmware macro changes for fw verison 1.13.32.0
Adds new macro and few macro changes for fw version 1.13.32.0 also
changes version string in driver to match 1.13.32.0

Signed-off-by: Hariprasad Shenai <hariprasad@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-04-01 14:47:20 -04:00
David S. Miller
af3e09e666 This contains just a single fix for a crash I happened to randomly
run into today during testing. It's clearly been around for a while,
 but is pretty hard to trigger, even when I tried explicitly (and
 modified the code to make it more likely) it rarely did.
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Merge tag 'mac80211-for-davem-2015-04-01' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac80211

Johannes Berg says:

====================
This contains just a single fix for a crash I happened to randomly
run into today during testing. It's clearly been around for a while,
but is pretty hard to trigger, even when I tried explicitly (and
modified the code to make it more likely) it rarely did.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2015-04-01 14:19:22 -04:00
Linus Torvalds
d4039314d0 IOMMU Fixes for Linux v4.0-rc6
This contains fixes for:
 
 	* A VT-d issue where hardware domain-ids might be freed while
 	  still in use.
 
 	* An ipmmu-vmsa issue where where the device-table was not zero
 	  terminated
 
 	* Unchecked register access issue in the arm-smmu driver
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Merge tag 'iommu-fixes-v4.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu

Pull IOMMU fixes from Joerg Roedel:
 "This contains fixes for:

   - a VT-d issue where hardware domain-ids might be freed while still
     in use.

   - an ipmmu-vmsa issue where where the device-table was not zero
     terminated

   - unchecked register access issue in the arm-smmu driver"

* tag 'iommu-fixes-v4.0-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu/vt-d: Remove unused variable
  iommu: ipmmu-vmsa: Add terminating entry for ipmmu_of_ids
  iommu/vt-d: Detach domain *only* from attached iommus
  iommu/arm-smmu: fix ARM_SMMU_FEAT_TRANS_OPS condition
2015-04-01 10:29:55 -07:00
Rusty Russell
e1b7c029a3 lguest: now needs PCI_DIRECT.
Since commit 8e70946943 ("lguest: add a dummy PCI host bridge.")
lguest uses PCI, but it needs you to frob the ports directly.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-04-01 10:29:05 -07:00
Linus Torvalds
b6c3a5946c This fixes a problem in the lazy time patches, which can cause
frequently updated inods to never have their timestamps updated.
 These changes guarantee that no timestamp on disk will be stale by
 more than 24 hours.
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Merge tag 'lazytime_fix' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4

Pull lazytime fixes from Ted Ts'o:
 "This fixes a problem in the lazy time patches, which can cause
  frequently updated inods to never have their timestamps updated.

  These changes guarantee that no timestamp on disk will be stale by
  more than 24 hours"

* tag 'lazytime_fix' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  fs: add dirtytime_expire_seconds sysctl
  fs: make sure the timestamps for lazytime inodes eventually get written
2015-04-01 10:05:42 -07:00
Linus Torvalds
1e848913f0 Merge branch 'for-4.0' of git://linux-nfs.org/~bfields/linux
Pull nfsd fixes from Bruce Fields:
 "Two main issues:

   - We found that turning on pNFS by default (when it's configured at
     build time) was too aggressive, so we want to switch the default
     before the 4.0 release.

   - Recent client changes to increase open parallelism uncovered a
     serious bug lurking in the server's open code.

  Also fix a krb5/selinux regression.

  The rest is mainly smaller pNFS fixes"

* 'for-4.0' of git://linux-nfs.org/~bfields/linux:
  sunrpc: make debugfs file creation failure non-fatal
  nfsd: require an explicit option to enable pNFS
  NFSD: Fix bad update of layout in nfsd4_return_file_layout
  NFSD: Take care the return value from nfsd4_encode_stateid
  NFSD: Printk blocklayout length and offset as format 0x%llx
  nfsd: return correct lockowner when there is a race on hash insert
  nfsd: return correct openowner when there is a race to put one in the hash
  NFSD: Put exports after nfsd4_layout_verify fail
  NFSD: Error out when register_shrinker() fail
  NFSD: Take care the return value from nfsd4_decode_stateid
  NFSD: Check layout type when returning client layouts
  NFSD: restore trace event lost in mismerge
2015-04-01 09:45:47 -07:00
Shuah Khan
072264fee8 selftests: Change memory on-off-test.sh name to be unique
cpu and memory hotplug scripts use the same name. Change
memory on-off-test.sh to mem-on-off-test.sh.

Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-04-01 10:33:02 -06:00
Shuah Khan
cc16782169 selftests: change cpu on-off-test.sh name to be unique
cpu and memory hotplug scripts use the same name. Change
cpu on-off-test.sh to cpu-on-off-test.sh.

Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2015-04-01 10:32:52 -06:00
David S. Miller
9c026424db Merge branch 'bnx2'
Yuval Mintz says:

====================
bnx2x: kdump related fixes

This patch series aims to fix bnx2x driver issues when loading in kdump kernel.
Both issues fixed here would be fatal to the device, requiring full reset of
the system in order to recover, preventing the device from serving its purpose
in the kdump environment.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2015-04-01 12:30:39 -04:00
Yuval Mintz
da254fbc63 bnx2x: Fix kdump when iommu=on
When IOMM-vtd is active, once main kernel crashes unfinished DMAE transactions
will be blocked, putting the HW in an error state which will cause further
transactions to timeout.

Current employed logic uses wrong macros, causing the first function to be the
only function that cleanups that error state during its probe/load.

This patch allows all the functions to successfully re-load in kdump kernel.

Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: Ariel Elior <Ariel.Elior@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-04-01 12:30:39 -04:00
Yuval Mintz
3d6b72534a bnx2x: Fix kdump on 4-port device
When running in a kdump kernel, it's very likely that due to sync. loss with
management firmware the first PCI function to probe and reach the previous
unload flow would decide it can reset the chip and continue onward. While doing
so, it will only close its own Rx port.

On a 4-port device where 2nd port on engine is a 1g-port, the 2nd port would
allow ingress traffic after the chip is reset [assuming it was active on the
first kernel]. This would later cause a HW attention.

This changes driver flow to close both ports' 1g capabilities during the
previous driver unload flow prior to the chip reset.

Signed-off-by: Yuval Mintz <Yuval.Mintz@qlogic.com>
Signed-off-by: Ariel Elior <Ariel.Elior@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-04-01 12:30:38 -04:00
Ingo Molnar
84a87c628a * Fixes and cleanups for SMBIOS 3.0 DMI code - Ivan Khoronzhuk
* A new efi=debug command line option that enables debug output in the
    EFI boot stub and results in less verbose EFI memory map output by
    default - Borislav Petkov
 
  * Disable interrupts around EFI calls and use a more standard page
    table saving and restoring idiom when making EFI calls - Ingo Molnar
 
  * Reduce the number of memory allocations performed when allocating the
    FDT in EFI boot stub by retrieving size from the FDT header in the
    EFI config table - Ard Biesheuvel
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Merge tag 'efi-next' of git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi into core/efi

Pull EFI updates from Matt Fleming:

 - Fixes and cleanups for SMBIOS 3.0 DMI code. (Ivan Khoronzhuk)

 - A new efi=debug command line option that enables debug output in the
   EFI boot stub and results in less verbose EFI memory map output by
   default. (Borislav Petkov)

 - Disable interrupts around EFI calls and use a more standard page
   table saving and restoring idiom when making EFI calls. (Ingo Molnar)

 - Reduce the number of memory allocations performed when allocating the
   FDT in EFI boot stub by retrieving size from the FDT header in the
   EFI config table. (Ard Biesheuvel)

Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-04-01 15:10:25 +02:00
Johannes Berg
788211d81b mac80211: fix RX A-MPDU session reorder timer deletion
There's an issue with the way the RX A-MPDU reorder timer is
deleted that can cause a kernel crash like this:

 * tid_rx is removed - call_rcu(ieee80211_free_tid_rx)
 * station is destroyed
 * reorder timer fires before ieee80211_free_tid_rx() runs,
   accessing the station, thus potentially crashing due to
   the use-after-free

The station deletion is protected by synchronize_net(), but
that isn't enough -- ieee80211_free_tid_rx() need not have
run when that returns (it deletes the timer.) We could use
rcu_barrier() instead of synchronize_net(), but that's much
more expensive.

Instead, to fix this, add a field tracking that the session
is being deleted. In this case, the only re-arming of the
timer happens with the reorder spinlock held, so make that
code not rearm it if the session is being deleted and also
delete the timer after setting that field. This ensures the
timer cannot fire after ___ieee80211_stop_rx_ba_session()
returns, which fixes the problem.

Cc: stable@vger.kernel.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
2015-04-01 14:35:01 +02:00
Thomas Gleixner
7270d11c56 arm/bL_switcher: Kill tick suspend hackery
Use the new tick_suspend/resume_local() and get rid of the
homebrewn implementation of these in the ARM bL switcher.  The
check for the cpumask is completely pointless.  There is no harm
to suspend a per cpu tick device unconditionally.  If that's a
real issue then we fix it proper at the core level and not with
some completely undocumented hacks in some random core code.

Move the tick internals to the core code, now that this nuisance
is gone.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
[ rjw: Rebase, changelog ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Nicolas Pitre <nicolas.pitre@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Link: http://lkml.kernel.org/r/1655112.Ws17YsMfN7@vostro.rjw.lan
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-04-01 14:23:00 +02:00
Thomas Gleixner
f46481d0a7 tick/xen: Provide and use tick_suspend_local() and tick_resume_local()
Xen calls on every cpu into tick_resume() which is just wrong.
tick_resume() is for the syscore global suspend/resume
invocation. What XEN really wants is a per cpu local resume
function.

Provide a tick_resume_local() function and use it in XEN.

Also provide a complementary tick_suspend_local() and modify
tick_unfreeze() and tick_freeze(), respectively, to use the
new local tick resume/suspend functions.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
[ Combined two patches, rebased, modified subject/changelog. ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: David Vrabel <david.vrabel@citrix.com>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1698741.eezk9tnXtG@vostro.rjw.lan
[ Merged to latest timers/core. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-04-01 14:23:00 +02:00
Thomas Gleixner
080873ce2d tick: Make tick_resume_broadcast_oneshot() static
Solely used in tick-broadcast.c and the return value is
hardcoded 0. Make it static and void.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1689058.QkHYDJSRKu@vostro.rjw.lan
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-04-01 14:22:59 +02:00
Thomas Gleixner
4ffee521f3 clockevents: Make suspend/resume calls explicit
clockevents_notify() is a leftover from the early design of the
clockevents facility. It's really not a notification mechanism,
it's a multiplex call.

We are way better off to have explicit calls instead of this
monstrosity. Split out the suspend/resume() calls and invoke
them directly from the call sites.

No locking required at this point because these calls happen
with interrupts disabled and a single cpu online.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
[ Rebased on top of 4.0-rc5. ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/713674030.jVm1qaHuPf@vostro.rjw.lan
[ Rebased on top of latest timers/core. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-04-01 14:22:59 +02:00
Thomas Gleixner
db6f672ef1 clockevents: Remove extra local_irq_save() in clockevents_exchange_device()
Called with 'clockevents_lock' held and interrupts disabled
already.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/51005827.yXt5tjZMBs@vostro.rjw.lan
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-04-01 14:22:59 +02:00