Unfortunately we didn't catch the missing comments earlier when the
patch was merged.
Signed-off-by: Paul Moore <pmoore@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The cnic module is responsible for initializing various bnx2x structs
via callbacks provided by the bnx2x module.
One such struct is the queue object for the FCoE queue.
If a device is working in AFEX mode and its configuration allows FCoE yet
the cnic module is not loaded, it's very likely a null pointer dereference
will occur, as the bnx2x will erroneously access the FCoE's queue object.
Prevent said access until cnic properly registers itself.
Signed-off-by: Yuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: Ariel Elior <ariele@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Invoking arch_flush_lazy_mmu_mode() results in calls to
preempt_enable()/disable() which may have performance impact.
Since lazy MMU is not used on bare metal we can patch away
arch_flush_lazy_mmu_mode() so that it is never called in such
environment.
[ hpa: the previous patch "Fix vmalloc_fault oops during lazy MMU
updates" may cause a minor performance regression on
bare metal. This patch resolves that performance regression. It is
somewhat unclear to me if this is a good -stable candidate. ]
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Link: http://lkml.kernel.org/r/1364045796-10720-2-git-send-email-konrad.wilk@oracle.com
Tested-by: Josh Boyer <jwboyer@redhat.com>
Tested-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Acked-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Cc: <stable@vger.kernel.org> SEE NOTE ABOVE
In paravirtualized x86_64 kernels, vmalloc_fault may cause an oops
when lazy MMU updates are enabled, because set_pgd effects are being
deferred.
One instance of this problem is during process mm cleanup with memory
cgroups enabled. The chain of events is as follows:
- zap_pte_range enables lazy MMU updates
- zap_pte_range eventually calls mem_cgroup_charge_statistics,
which accesses the vmalloc'd mem_cgroup per-cpu stat area
- vmalloc_fault is triggered which tries to sync the corresponding
PGD entry with set_pgd, but the update is deferred
- vmalloc_fault oopses due to a mismatch in the PUD entries
The OOPs usually looks as so:
------------[ cut here ]------------
kernel BUG at arch/x86/mm/fault.c:396!
invalid opcode: 0000 [#1] SMP
.. snip ..
CPU 1
Pid: 10866, comm: httpd Not tainted 3.6.10-4.fc18.x86_64 #1
RIP: e030:[<ffffffff816271bf>] [<ffffffff816271bf>] vmalloc_fault+0x11f/0x208
.. snip ..
Call Trace:
[<ffffffff81627759>] do_page_fault+0x399/0x4b0
[<ffffffff81004f4c>] ? xen_mc_extend_args+0xec/0x110
[<ffffffff81624065>] page_fault+0x25/0x30
[<ffffffff81184d03>] ? mem_cgroup_charge_statistics.isra.13+0x13/0x50
[<ffffffff81186f78>] __mem_cgroup_uncharge_common+0xd8/0x350
[<ffffffff8118aac7>] mem_cgroup_uncharge_page+0x57/0x60
[<ffffffff8115fbc0>] page_remove_rmap+0xe0/0x150
[<ffffffff8115311a>] ? vm_normal_page+0x1a/0x80
[<ffffffff81153e61>] unmap_single_vma+0x531/0x870
[<ffffffff81154962>] unmap_vmas+0x52/0xa0
[<ffffffff81007442>] ? pte_mfn_to_pfn+0x72/0x100
[<ffffffff8115c8f8>] exit_mmap+0x98/0x170
[<ffffffff810050d9>] ? __raw_callee_save_xen_pmd_val+0x11/0x1e
[<ffffffff81059ce3>] mmput+0x83/0xf0
[<ffffffff810624c4>] exit_mm+0x104/0x130
[<ffffffff8106264a>] do_exit+0x15a/0x8c0
[<ffffffff810630ff>] do_group_exit+0x3f/0xa0
[<ffffffff81063177>] sys_exit_group+0x17/0x20
[<ffffffff8162bae9>] system_call_fastpath+0x16/0x1b
Calling arch_flush_lazy_mmu_mode immediately after set_pgd makes the
changes visible to the consistency checks.
Cc: <stable@vger.kernel.org>
RedHat-Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=914737
Tested-by: Josh Boyer <jwboyer@redhat.com>
Reported-and-Tested-by: Krishna Raman <kraman@redhat.com>
Signed-off-by: Samu Kallio <samu.kallio@aberdeencloud.com>
Link: http://lkml.kernel.org/r/1364045796-10720-1-git-send-email-konrad.wilk@oracle.com
Tested-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
- Fix a brain fart in nfs41_walk_client_list
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Merge tag 'nfs-for-3.9-5' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull another nfs fixlet from Trond Myklebust:
"I suddenly noticed that a one-line issue that I _thought_ I had fixed
with the nfs41_walk_client_list patch was apparently still there in
the pull request I sent earlier today. I'm very sorry for not
catching that in time.
- Fix a brain fart in nfs41_walk_client_list"
* tag 'nfs-for-3.9-5' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
NFSv4: Doh! Typo in the fix to nfs41_walk_client_list
This patch fix the regression introduced by the commit 3202bf0157
"arm: mvebu: Improve the SMP support of the interrupt controller":
GPIO IRQ were no longer delivered to the CPUs.
To be delivered to a CPU an interrupt must be enabled at CPU level and
at interrupt source level. Before the offending patch, all the
interrupts were enabled at source level during map() function. Mask()
and unmask() was done by handling the per-CPU part. It was fine when
running in UP with only one CPU.
The offending patch added support for SMP, in this case mask() and
unmask() was done by handling the interrupt source level part. The
per-CPU level part was handled by the affinity API to select the CPU
which will receive the interrupt. (Due to some hardware limitation
only one CPU at a time can received a given interrupt).
For "normal" interrupt __setup_irq() was called when an irq was
registered. irq_set_affinity() is called from this function, which
enabled the interrupt on one of the CPUs. Whereas for GPIO IRQ which
were chained interrupts, the irq_set_affinity() was never called and
none of the CPUs was selected to receive the interrupt.
With this patch all the interrupt are enable on the current CPU during
map() function. Enabling the interrupts on a CPU doesn't depend
anymore on irq_set_affinity() and then the chained irq are not anymore
a special case. However the CPU which will receive the irq can still
be modify later using irq_set_affinity().
Tested with Mirabox (A370) and Openblocks AX3 (AXP), rootfs mounted
over NFS, compiled with CONFIG_SMP=y/N.
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Reported-by: Ryan Press <ryan@presslab.us>
Investigated-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Tested-by: Ryan Press <ryan@presslab.us>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Make sure that we set the status to 0 on success. Missed in testing
because it never appears when doing multiple mounts to _different_
servers.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: <stable@vger.kernel.org> # 3.7.x: 7b1f1fd: NFSv4/4.1: Fix bugs in nfs4[01]_walk_client_list
- Stable fix for memory corruption issues in nfs4[01]_walk_client_list
- Stable fix for an Oopsable bug in rpc_clone_client
- Another state manager deadlock in the NFSv4 open code
- Memory leaks in nfs4_discover_server_trunking and rpc_new_client
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Merge tag 'nfs-for-3.9-4' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull NFS client bugfixes from Trond Myklebust:
- fix for memory corruption issues in nfs4[01]_walk_client_list (stable)
- fix for an Oopsable bug in rpc_clone_client (stable)
- another state manager deadlock in the NFSv4 open code
- memory leaks in nfs4_discover_server_trunking and rpc_new_client
* tag 'nfs-for-3.9-4' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
NFSv4: Fix another potential state manager deadlock
SUNRPC: Fix a potential memory leak in rpc_new_client
NFSv4/4.1: Fix bugs in nfs4[01]_walk_client_list
NFSv4: Fix a memory leak in nfs4_discover_server_trunking
SUNRPC: Remove extra xprt_put()
cyclic DMA is only used by audio which needs DMA to be started without a
delay.
If the DMA for audio is started using the tasklet we experience random
channel switch (to be more precise: channel shift).
Reported-by: Peter Meerwald <pmeerw@pmeerw.net>
CC: stable@vger.kernel.org # v3.7+
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Acked-by: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Pull crypto fixes from Herbert Xu:
"This fixes a GCM bug that breaks IPsec and a compile problem in
ux500."
* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: ux500 - add missing comma
crypto: gcm - fix assumption that assoc has one segment
Pull drm fixes from Dave Airlie:
"Just a spare semicolon in nouveau that caused some issues, and an
mgag200 fix"
* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
drm/mgag200: Index 24 in extended CRTC registers is 24 in hex, not decimal.
drm/nouveau: fix unconditional return waiting on memory
This change properly enables the "requester" in G200ER cards that is
responsible for getting pixels out of memory and clocking them out to
the screen.
Signed-off-by: Christopher Harvey <charvey@matrox.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>
On the failure path, stat->start and stat->pages will refer same page.
So it'll attempt to free the same page again and get kernel panic.
Link: http://lkml.kernel.org/r/1364820385-32027-1-git-send-email-namhyung@kernel.org
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: stable@vger.kernel.org
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
arch_local_irq_save() and friends are required to act as compiler
memory barriers. This patch adds a "memory" clobber to the inline
asm code in arch_local_irq_restore() which is used as the building
block for other functions needing to set/clear the interrupt enable
in the CSR register.
Signed-off-by: Mark Salter <msalter@redhat.com>
Pull vfs fixes from Al Viro:
"A nasty bug in fs/namespace.c caught by Andrey + a couple of less
serious unpleasantness - ecryptfs misc device playing hopeless games
with try_module_get() and palinfo procfs support being... not quite
correctly done, to be polite."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
mnt: release locks on error path in do_loopback
palinfo fixes
procfs: add proc_remove_subtree()
ecryptfs: close rmmod race
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Merge tag 'for-linus-20130409' of git://git.kernel.dk/linux-block
Pull block fixes from Jens Axboe:
"I've got a few smaller fixes queued up for 3.9 that should go in. The
major one is the loop regression, the others are nice fixes on their
own though. It contains:
- Fix for unitialized var in the block sysfs code, courtesy of Arnd
and gcc-4.8.
- Two fixes for mtip32xx, fixing probe and command timeout. Also a
debug measure that could have waited for 3.10, but it's driver
only, so I let it slip in.
- Revert the loop partition cleanup fix, it could cause a deadlock on
auto-teardown as part of umount. The fix is clear, but at this
point we just want to revert it and get a real fix in for 3.10."
* tag 'for-linus-20130409' of git://git.kernel.dk/linux-block:
Revert "loop: cleanup partitions when detaching loop device"
mtip32xx: fix two smatch warnings
mtip32xx: Add debugfs entry device_status
mtip32xx: return 0 from pci probe in case of rebuild
mtip32xx: recovery from command timeout
block: avoid using uninitialized value in from queue_var_store
do_loopback calls lock_mount(path) and forget to unlock_mount
if clone_mnt or copy_mnt fails.
[ 77.661566] ================================================
[ 77.662939] [ BUG: lock held when returning to user space! ]
[ 77.664104] 3.9.0-rc5+ #17 Not tainted
[ 77.664982] ------------------------------------------------
[ 77.666488] mount/514 is leaving the kernel with locks still held!
[ 77.668027] 2 locks held by mount/514:
[ 77.668817] #0: (&sb->s_type->i_mutex_key#7){+.+.+.}, at: [<ffffffff811cca22>] lock_mount+0x32/0xe0
[ 77.671755] #1: (&namespace_sem){+++++.}, at: [<ffffffff811cca3a>] lock_mount+0x4a/0xe0
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* check for proc_mkdir() failures
* fix buffer overrun - sizeof(format string) is *not* enough to
hold sprintf() result.
* use proc_remove_subtree(); life's much easier with it
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
just what it sounds like; do that only to procfs subtrees you've
created - doing that to something shared with another driver is
not only antisocial, but might cause interesting races with
proc_create() and its ilk.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
In UP and non-preempt respectively, the spinlocks and preemption
disable/enable points are stubbed out entirely, because there is no
regular code that can ever hit the kind of concurrency they are meant to
protect against.
However, while there is no regular code that can cause scheduling, we
_do_ end up having some exceptional (literally!) code that can do so,
and that we need to make sure does not ever get moved into the critical
region by the compiler.
In particular, get_user() and put_user() is generally implemented as
inline asm statements (even if the inline asm may then make a call
instruction to call out-of-line), and can obviously cause a page fault
and IO as a result. If that inline asm has been scheduled into the
middle of a preemption-safe (or spinlock-protected) code region, we
obviously lose.
Now, admittedly this is *very* unlikely to actually ever happen, and
we've not seen examples of actual bugs related to this. But partly
exactly because it's so hard to trigger and the resulting bug is so
subtle, we should be extra careful to get this right.
So make sure that even when preemption is disabled, and we don't have to
generate any actual *code* to explicitly tell the system that we are in
a preemption-disabled region, we need to at least tell the compiler not
to move things around the critical region.
This patch grew out of the same discussion that caused commits
79e5f05edc ("ARC: Add implicit compiler barrier to raw_local_irq*
functions") and 3e2e0d2c22 ("tile: comment assumption about
__insn_mtspr for <asm/irqflags.h>") to come about.
Note for stable: use discretion when/if applying this. As mentioned,
this bug may never have actually bitten anybody, and gcc may never have
done the required code motion for it to possibly ever trigger in
practice.
Cc: stable@vger.kernel.org
Cc: Steven Rostedt <srostedt@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Marc Kleine-Budde says:
====================
here's a fix for the v3.9 release cycle, if not too late:
Wei Yongjun contributes a patch for the can-gw protocoll. The patch fixes the
memory allocated with kmem_cache_alloc(), is now freed using kmem_cache_free(),
not kfree().
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit 90ba9b1986 (tcp: tcp_make_synack() can use alloc_skb())
broke certain SELinux/NetLabel configurations by no longer correctly
assigning the sock to the outgoing SYNACK packet.
Cost of atomic operations on the LISTEN socket is quite big,
and we would like it to happen only if really needed.
This patch introduces a new security_ops->skb_owned_by() method,
that is a void operation unless selinux is active.
Reported-by: Miroslav Vadkerti <mvadkert@redhat.com>
Diagnosed-by: Paul Moore <pmoore@redhat.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: linux-security-module@vger.kernel.org
Acked-by: James Morris <james.l.morris@oracle.com>
Tested-by: Paul Moore <pmoore@redhat.com>
Acked-by: Paul Moore <pmoore@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Don't hold the NFSv4 sequence id while we check for open permission.
The call to ACCESS may block due to reboot recovery.
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
The arch_local_irq_save(), etc., routines are required to function
as compiler barriers. They do, but it's subtle and requires knowing
that the gcc builtin __insn_mtspr() is marked as a memory clobber.
Provide a comment explaining the assumption.
Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
[ This came about from me wondering about the synchronization rules of
__insn_mtspr() - Linus ]
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This reverts commit bc8ce4 (regmap: don't corrupt work buffer in
_regmap_raw_write()) since it turns out that it can cause issues when
taken in isolation from the other changes in -next that lead to its
discovery. On the basis that nobody noticed the problems for quite some
time without that subsequent work let's drop it from v3.9.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
The Charge Pump needs the DSP clock to work properly, without it the
bypass to HP/LINEOUT is not working properly. This requirement is not
mentioned in the datasheet but has been confirmed by Mark Brown from
Wolfson.
Signed-off-by: Alban Bedel <alban.bedel@avionic-design.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Cc: stable@vger.kernel.org
The external pending interrupt register address (EINTPEND) offset is
0xa8, not 0x08. Without this patch the external interrupts are not
properly acknowledged, which may lead to an interrupt storm and the
system hang as soon as any external interrupt is requested.
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Due to NR_IRQS being incorrectly defined not all IRQ domains can
be registered for S3C2440. It causes following errors on a s3c2440
SoC based board:
NR_IRQS:89
S3C2440: IRQ Support
irq: clearing pending status 00000002
------------[ cut here ]------------
WARNING: at kernel/irq/irqdomain.c:234 0xc0056ed0()
...
irq: could not create irq-domain
...
s3c2410-wdt s3c2410-wdt: failed to install irq (-22)
s3c2410-wdt: probe of s3c2410-wdt failed with error -22
...
samsung-uart s3c2440-uart.0: cannot get irq 74
Fix this by increasing NR_IRQS to at least (IRQ_S3C2443_AC97 + 1)
if CPU_S3C2440 is selected, so the subintc IRQ domain gets properly
registered.
Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Acked-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
* A couple imx35 clock fixes for regressions caused by common clock
framework conversion. The admux and iomux get disabled by common
clock framework late initcall, and hence causes problems.
* Add missing twd clock lookup in device tree. This becomes required
since commit bd60345 (ARM: use device tree to get smp_twd clock)
forces all DT boot to find lookup from device tree.
* Fix imx6q ldb_di clock parents mismatch per reference manual.
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Merge tag 'imx-fixes-3.9-5' of git://git.linaro.org/people/shawnguo/linux-2.6 into fixes
From Shawn Guo <shawn.guo@linaro.org>:
The imx fixes for 3.9, take 5:
* A couple imx35 clock fixes for regressions caused by common clock
framework conversion. The admux and iomux get disabled by common
clock framework late initcall, and hence causes problems.
* Add missing twd clock lookup in device tree. This becomes required
since commit bd60345 (ARM: use device tree to get smp_twd clock)
forces all DT boot to find lookup from device tree.
* Fix imx6q ldb_di clock parents mismatch per reference manual.
* tag 'imx-fixes-3.9-5' of git://git.linaro.org/people/shawnguo/linux-2.6: (217 commits)
ARM i.MX6: Fix ldb_di clock selection
ARM: imx: provide twd clock lookup from device tree
ARM: imx35 Bugfix admux clock
ARM: clk-imx35: Bugfix iomux clock
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
According to the recent i.MX6 Quad technical reference manual, mode 0x4 (100b)
of the CCM_CS2DCR register (address 0x020C402C) bits [11-9] and [14-12] select
the PLL3 clock, and not the PLL3 PFD1 540M clock. In our code, the PLL3 root
clock is named 'pll3_usb_otg', select this instead of the 540M clock.
Signed-off-by: Dirk Behme <dirk.behme@de.bosch.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
While booting from device tree, imx6q used to provide twd clock lookup
by calling clk_register_clkdev() in clock driver. However, the commit
bd60345 (ARM: use device tree to get smp_twd clock) forces DT boot to
look up the clock from device tree. It causes the failure below when
twd driver tries to get the clock, and hence kernel has to calibrate the
local timer frequency.
smp_twd: clock not found -2
...
Calibrating local timer... 396.13MHz.
Fix the regression by providing twd clock lookup from device tree, and
remove the unused twd clk_register_clkdev() call from clock driver.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
The admux clock seems to be the audmux clock as tests show. audmux does
not work without this clock enabled. Currently imx35 does not register a
clock device for audmux. This patch adds this registration. imx-audmux
driver already handles a clock device, so no changes are necessary
there.
Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Cc: stable@vger.kernel.org
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
This patch enables iomuxc_gate clock. It is necessary to be able to
reconfigure iomux pads. Without this clock enabled, the
clk_disable_unused function will disable this clock and the iomux pads
are not configurable anymore. This happens at every boot. After a reboot
(watchdog system reset) the clock is not enabled again, so all iomux pad
reconfigurations in boot code are without effect.
The iomux pads should be always configurable, so this patch always
enables it.
Signed-off-by: Markus Pargmann <mpa@pengutronix.de>
Cc: stable@vger.kernel.org
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Memory allocated by kmem_cache_alloc() should be freed using
kmem_cache_free(), not kfree().
Cc: linux-stable <stable@vger.kernel.org> # >= v3.2
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Acked-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Compiling for linux-3.9-rc1 and later fails with:
drivers/gpio/devres.c: In function 'devm_gpio_request_one':
drivers/gpio/devres.c:90:2: error: implicit declaration of function 'gpio_request_one' [-Werror=implicit-function-declaration]
So provide a local gpio_request_one() function. Code largely borrowed from
blackfin's local gpio_request_one() function.
Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
sizeof() when applied to a pointer typed expression gives the size of the
pointer, not that of the pointed data.
Introduced by commit 3ce5ef(netrom: fix info leak via msg_name in nr_recvmsg)
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
- Suman fixed an issue that crawled in with the move to the new
idr_alloc interface in 3.9
- Dmitry fixed an STE specific memory leak
- Sjur fixed an error path in the core
- Rob fixed a Kconfig typo
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Merge tag 'remoteproc-3.9-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad/remoteproc
Pull remoteproc fixes from Ohad Ben-Cohen:
"Four small remoteproc fixes:
- Suman fixed an issue that crawled in with the move to the new
idr_alloc interface in 3.9
- Dmitry fixed an STE specific memory leak
- Sjur fixed an error path in the core
- Rob fixed a Kconfig typo"
* tag 'remoteproc-3.9-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad/remoteproc:
remoteproc: fix FW_CONFIG typo
remoteproc: fix error path of handle_vdev
remoteproc/ste: fix memory leak on shutdown
remoteproc: fix the error check for idr_alloc
too many semicolons.
* 'drm-nouveau-fixes-3.9' of git://anongit.freedesktop.org/git/nouveau/linux-2.6:
drm/nouveau: fix unconditional return waiting on memory
Typo in nv50_display_flip_wait allows page flipping to run ahead before
memory has time to settle.
Signed-off-by: Calvin Owens <jcalvinowens@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
certain hardware installed.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sfr/next-fixes
Pull powerpc bugfix from Stephen Rothwell:
"A single BUG_ON fix for a condition that could happen for machines
with certain hardware installed."
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sfr/next-fixes:
powerpc: pSeries_lpar_hpte_remove fails from Adjunct partition being performed before the ANDCOND test
ARC irqsave/restore macros were missing the compiler barrier, causing a
stale load in irq-enabled region be used in irq-safe region, despite
being changed, because the register holding the value was still live.
The problem manifested as random crashes in timer code when stress
testing ARCLinux (3.9-rc3) on a !SMP && !PREEMPT_COUNT
Here's the exact sequence which caused this:
(0). tv1[x] <----> t1 <---> t2
(1). mod_timer(t1) interrupted after it calls timer_pending()
(2). mod_timer(t2) completes
(3). mod_timer(t1) resumes but messes up the list
(4). __runt_timers( ) uses bogus timer_list entry / crashes in
timer->function
Essentially mod_timer() was racing against itself and while the spinlock
serialized the tv1[] timer link list, timer_pending() called outside the
spinlock, cached timer link list element in a register.
With low register pressure (and a deep register file), lack of barrier
in raw_local_irqsave() as well as preempt_disable (!PREEMPT_COUNT
version), there was nothing to force gcc to reload across the spinlock,
causing a stale value in reg be used for link list manipulation - ensuing
a corruption.
ARcompact disassembly which shows the culprit generated code:
mod_timer:
push_s blink
mov_s r13,r0 # timer, timer
..
###### timer_pending( )
ld_s r3,[r13] # <------ <variable>.entry.next LOADED
brne r3, 0, @.L163
.L163:
..
###### spin_lock_irq( )
lr r5, [status32] # flags
bic r4, r5, 6 # temp, flags,
and.f 0, r5, 6 # flags,
flag.nz r4
###### detach_if_pending( ) begins
tst_s r3,r3 <--------------
# timer_pending( ) checks timer->entry.next
# r3 is NOT reloaded by gcc, using stale value
beq.d @.L169
mov.eq r0,0
##### detach_timer( ): __list_del( )
ld r4,[r13,4] # <variable>.entry.prev, D.31439
st r4,[r3,4] # <variable>.prev, D.31439
st r3,[r4] # <variable>.next, D.30246
We initially tried to fix this by adding barrier() to preempt_* macros
for !PREEMPT_COUNT but Linus clarified that it was anything but wrong.
http://www.spinics.net/lists/kernel/msg1512709.html
[vgupta: updated commitlog]
Reported-by/Signed-off-by: Christian Ruppert <christian.ruppert@abilis.com>
Cc: Christian Ruppert <christian.ruppert@abilis.com>
Cc: Pierrick Hascoet <pierrick.hascoet@abilis.com>
Debugged-by/Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
which mistakenly changed an 'int' return type to a 'bool'. Broken
by 4dce8ba94c.
2) Add Slimtype DVD A DS8A8SH ATAPI quirk
3) ata_piix: Intel Haswell platform quirk
4) Avoid DMA'ing to stack buffer, when obtaining DEVSLP timings.
IMO a mild regression, given that libata previously did not DMA to a stack
buffer. Broken by 803739d2.
5) Fix regression impacting SMART and smartd, broken by 84a9a8cd9.
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Merge tag 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev
Pull libata fixes from Jeff Garzik:
"The HDIO_DRIVE_* fix is really the biggie.
1) Fix ATAPI regression, noticed mainly on tape drives, due to a
commit which mistakenly changed an 'int' return type to a 'bool'.
Broken by commit 4dce8ba94c ("libata: Use 'bool' return value for
ata_id_XXX")
2) Add Slimtype DVD A DS8A8SH ATAPI quirk
3) ata_piix: Intel Haswell platform quirk
4) Avoid DMA'ing to stack buffer, when obtaining DEVSLP timings. IMO
a mild regression, given that libata previously did not DMA to a
stack buffer. Broken by commit commit 803739d25c ("[libata]
replace sata_settings with devslp_timing")
5) Fix regression impacting SMART and smartd, broken by commit
84a9a8cd9d ("[libata] Set proper SK when CK_COND is set")"
* tag 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
[libata] Fix HDIO_DRIVE_* ioctl() Linux 3.9 regression
libata: fix DMA to stack in reading devslp_timing parameters
ata_piix: Fix DVD not dectected at some Haswell platforms
libata: Set max sector to 65535 for Slimtype DVD A DS8A8SH drive
libata: Use integer return value for atapi_command_packet_set
fixes a long time minor bug.
The first patch fixes a race that can happen if the user switches
from the irqsoff tracer to another tracer. If a irqs off latency is
detected, it will try to use the snapshot buffer, but the new tracer
wont have it allocated. There's a nasty warning that gets printed and
the trace is ignored. Nothing crashes, just a nasty WARN_ON is shown.
The second patch fixes an issue where if the sysctl is used to disable
and enable function tracing, it can put the function tracing into an
unstable state.
The third patch fixes an issue with perf using the function tracer.
An update was done, where the stub function could be called during
the perf function tracing, and that stub function wont have the
"control" flag set and cause a nasty warning when running perf.
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Merge tag 'trace-fixes-3.9-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
Pull tracing fixes from Steven Rostedt:
"This includes three fixes. Two fix features added in 3.9 and one
fixes a long time minor bug.
The first patch fixes a race that can happen if the user switches from
the irqsoff tracer to another tracer. If a irqs off latency is
detected, it will try to use the snapshot buffer, but the new tracer
wont have it allocated. There's a nasty warning that gets printed and
the trace is ignored. Nothing crashes, just a nasty WARN_ON is shown.
The second patch fixes an issue where if the sysctl is used to disable
and enable function tracing, it can put the function tracing into an
unstable state.
The third patch fixes an issue with perf using the function tracer.
An update was done, where the stub function could be called during the
perf function tracing, and that stub function wont have the "control"
flag set and cause a nasty warning when running perf."
* tag 'trace-fixes-3.9-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace:
ftrace: Do not call stub functions in control loop
ftrace: Consistently restore trace function on sysctl enabling
tracing: Fix race with update_max_tr_single and changing tracers
