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'channels' is allocated via kmemdup and it is never freed.
Use 'indio_dev->channels' directly instead, so that we avoid such
memory leak problem.
Reported-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Reviewed-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
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According to hardware team there should be some delay after
setting channel number, start mode and before setting START.
Add a one microsecond delay for this purpose.
Fixes: 1664f6a5b0c8 ("iio: adc: Cosmic Circuits 10001 ADC driver")
Signed-off-by: Naidu Tellapati <naidu.tellapati@imgtec.com>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@imgtec.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
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regulator_get_voltage() returns a non-negative value in case of success,
and a negative error in case of error. Let's fix this.
Fixes: 1664f6a5b0c8 ("iio: adc: Cosmic Circuits 10001 ADC driver")
Signed-off-by: Naidu Tellapati <naidu.tellapati@imgtec.com>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@imgtec.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
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At present we are incorrectly setting the register to 0x1 to power up
the ADC. Since it is an active high power down register, we need to set
the register to 0x0 to actually power up. Conversely, writing 0x1 to the
register powers it down.
This commit adds a couple of helpers to make the code clearer and then
use them to do the power-up/power-down properly.
Fixes: 1664f6a5b0c8 ("iio: adc: Cosmic Circuits 10001 ADC driver")
Signed-off-by: Naidu Tellapati <naidu.tellapati@imgtec.com>
Signed-off-by: Ezequiel Garcia <ezequiel.garcia@imgtec.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
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Since commit 8b283c025443 ("ARM: exynos4/5: convert pmu wakeup to
stacked domains"), a suspend/resume is not supported on old DT.
Although, rather than printing a warning and continue to boot, the
kernel will segfault just after:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 1 at arch/arm/mach-exynos/suspend.c:726 exynos_pm_init+0x4c/0xc8()
Modules linked in:
CPU: 1 PID: 1 Comm: swapper/0 Not tainted 4.1.0-rc3 #1
Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
[<c02181c4>] (unwind_backtrace) from [<c0213b2c>] (show_stack+0x10/0x14)
[<c0213b2c>] (show_stack) from [<c0949890>] (dump_stack+0x70/0x8c)
[<c0949890>] (dump_stack) from [<c024f0b0>] (warn_slowpath_common+0x74/0xac)
[<c024f0b0>] (warn_slowpath_common) from [<c024f104>] (warn_slowpath_null+0x1c/0x24)
[<c024f104>] (warn_slowpath_null) from [<c0cf1d28>] (exynos_pm_init+0x4c/0xc8)
[<c0cf1d28>] (exynos_pm_init) from [<c0ceaae8>] (init_machine_late+0x1c/0x28)
[<c0ceaae8>] (init_machine_late) from [<c020aa64>] (do_one_initcall+0x80/0x1d0)
[<c020aa64>] (do_one_initcall) from [<c0ce8d4c>] (kernel_init_freeable+0x10c/0x1d8)
[<c0ce8d4c>] (kernel_init_freeable) from [<c0944a2c>] (kernel_init+0x8/0xe4)
[<c0944a2c>] (kernel_init) from [<c0210e60>] (ret_from_fork+0x14/0x34)
---[ end trace 335bd937d409f3c7 ]---
Outdated DT detected, suspend/resume will NOT work
Unable to handle kernel NULL pointer dereference at virtual address 00000608
pgd = c0204000
[00000608] *pgd=00000000
Internal error: Oops: 5 [#1] SMP ARM
Modules linked in:
CPU: 1 PID: 1 Comm: swapper/0 Tainted: G W 4.1.0-rc3 #1
Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
task: db06c000 ti: db05a000 task.ti: db05a000
PC is at exynos_pm_init+0x6c/0xc8
LR is at exynos_pm_init+0x54/0xc8
pc : [<c0cf1d48>] lr : [<c0cf1d30>] psr: 60000113
sp : db05bee8 ip : 00000000 fp : 00000000
r10: 00000116 r9 : c0dab2d4 r8 : d8d5f440
r7 : c0db7ad8 r6 : c0db7ad8 r5 : 00000000 r4 : c0ceaacc
r3 : c0eb2aec r2 : c0951e40 r1 : 00000000 r0 : c0eb2acc
Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment kernel
Control: 10c5387d Table: 6020406a DAC: 00000015
Process swapper/0 (pid: 1, stack limit = 0xdb05a220)
Stack: (0xdb05bee8 to 0xdb05c000)
bee0: c0db7ad8 c0d8fe34 c0cf17c8 c0ceaae8 00000000 c020aa64
bf00: 00000033 c09580b8 db04fd00 c0ed79a4 c0eb1000 c0ce8588 c0ca2bc4 c0353fcc
bf20: 00000000 c0df358c 60000113 00000000 dbfffba4 00000000 c0ca2bc4 c026654c
bf40: c0b80134 c0ca1a64 00000007 00000007 c0df3554 c0d6c2f4 00000007 c0d6c2d4
bf60: c0eb1000 c0ce8588 c0dab2d4 00000116 00000000 c0ce8d4c 00000007 00000007
bf80: c0ce8588 c0944a24 00000000 c0944a24 00000000 00000000 00000000 00000000
bfa0: 00000000 c0944a2c 00000000 c0210e60 00000000 00000000 00000000 00000000
bfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
bfe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
[<c0cf1d48>] (exynos_pm_init) from [<c0ceaae8>] (init_machine_late+0x1c/0x28)
[<c0ceaae8>] (init_machine_late) from [<c020aa64>] (do_one_initcall+0x80/0x1d0)
[<c020aa64>] (do_one_initcall) from [<c0ce8d4c>] (kernel_init_freeable+0x10c/0x1d8)
[<c0ce8d4c>] (kernel_init_freeable) from [<c0944a2c>] (kernel_init+0x8/0xe4)
[<c0944a2c>] (kernel_init) from [<c0210e60>] (ret_from_fork+0x14/0x34)
Code: e59f005c e59220c0 e5901000 e5832000 (e591e608)
---[ end trace 335bd937d409f3c8 ]---
This is happening because pmu_base_addr is only initialized when the
PMU is an interrupt controller. It's not the case on old DT.
Signed-off-by: Julien Grall <julien.grall@citrix.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
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The Marvell mwifiex driver prevents the system to enter into a suspend
state if the card power is not preserved during a suspend/resume cycle.
So Suspend-to-RAM and Suspend-to-idle is failing on Exynos5800 Peach Pi
and Exynos5420 Peach Pit Chromebooks.
Add the keep-power-in-suspend Power Management property to the SDIO/MMC
node so the mwifiex suspend handler doesn't fail and the system is able
to enter into a suspend state.
Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>
Reviewed-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
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Commit d4988623cc60 ("IB/qib: use arch_phys_wc_add()")
adjusted mtrr inititialization to use the new interface.
Unfortunately, the new interface returns a signed
value and the patch tested the unsigned wc_cookie.
Fix the issue by changing the type of wc_cookie to int. For
the success case the ret left at zero to avoid
a warning from the caller. For failure wc_cookie
is used as the ret.
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
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Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
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These attributes should be exposed for the matching connector types
only, so checking is redundant.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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The show methods for the attributes of DVI-I and TV-out types have a
bunch of code to deal with the differences between the two. Just split
the attributes into connector type specific ones. No functional changes.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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Split DVI-I and TV-out (which remains a group of types). As an
intermediate step, still share the attributes themselves between the
two. No user visible changes.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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This reduces duplication in the patches to follow. No functional
changes.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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Currently we're adding CEA modes after the inferred modes, which means
we might get multiple modes that are very close to each other, but
slightly different, which seems a bit silly. That's because duplicate
mode check that occurs when adding inferred modes would not consider
CEA modes as potential duplicates. Reverse the order so that CEA
modes get added before inferred modes, and are thus considered potential
duplicates.
Or as ajax put it on irc:
"< ajax> the point of the "pick a timing formula" heuristic was to
generate something the sink could _likely_ sink. if it tells us
timings it can sink explicitly then second-guessing seems dumb."
Cc: Adam Jackson <ajax@redhat.com>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Adam Jackson <ajax@redhat.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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The string iwpm_ulib_name is recorded in a nlmsg as a netlink attribute.
Without this fix parsing of the nlmsg by the userspace port mapper service fails
because of unknown attribute length, causing the port mapper service not to
register the client, which has sent the nlmsg.
Signed-off-by: Tatyana Nikolova <tatyana.e.nikolova@intel.com>
Cc: <stable@vger.kernel.org> #v3.16
Reviewed-By: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
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Commit 46490b572544 ("MIPS: kernel: elf: Improve the overall ABI and FPU
mode checks") reworked the ELF FP ABI mode selection logic, but when
CONFIG_MIPS_O32_FP64_SUPPORT is enabled it breaks the use of binaries
which have no PT_MIPS_ABIFLAGS program header & associated
.MIPS.abiflags section.
A default mode is selected based upon whether the ELF contains MIPS32 or
MIPS64 code, but that selection is made in arch_elf_pt_proc.
arch_elf_pt_proc only executes when a PT_MIPS_ABIFLAGS program header is
found. If one is not found then arch_elf_pt_proc is never called, and no
default overall_fp_mode value is selected. When arch_check_elf is
called, both abi0 & abi1 are MIPS_ABI_FP_UNKNOWN which leads to both
prog_req & interp_req being set to none_req. none_req matches none of
the conditions for mode selection at the end of arch_check_elf, so
overall_fp_mode is left untouched. Finally once mips_set_personality_fp
is called the BUG() in the default case is then hit & the kernel likely
panics.
Fix this by moving the selection of a default overall mode to the start
of arch_check_elf, which runs once per ELF executed regardless of
whether it has a PT_MIPS_ABIFLAGS program header.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Markos Chandras <markos.chandras@imgtec.com>
Cc: Matthew Fortune <matthew.fortune@imgtec.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: stable@vger.kernel.org # v4.0+
Patchwork: http://patchwork.linux-mips.org/patch/9978/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Commit d795ef9aa831 ("arm64: perf: don't warn about missing
interrupt-affinity property for PPIs") added a check for PPIs so that
we avoid parsing the interrupt-affinity property for these naturally
affine interrupts.
Unfortunately, this check can trigger an early (successful) return and
we will leak the irqs array. This patch fixes the issue by reordering
the code so that the check is performed before any independent
allocation.
Reported-by: David Binderman <dcb314@hotmail.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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This patch fixes a compiler warning in gemini_restart()
issued by commit 7b6d864b48d9 ("reboot:arm: reboot_mode
changes from char to enum reboot_mode").
arch/arm/mach-gemini/board-rut1xx.c:93:2: warning: initialization from incompatible pointer type
The warning is harmless, and the patch does not need to
be backported to stable kernels.
Fixes: 7b6d864b48d ("reboot:arm: reboot_mode changes from char to enum reboot_mode.")
Signed-off-by: Hans Ulli Kroll <ulli.kroll@googlemail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes
Merge "Few fixes for omap clocks, PRM and hwmod code" from Tony Lindgren:
- Fix bogus comparison of struct clk pointers, turns out
we can fix it by just removing the comparison
- Fix am437 hardreset implementation and remove boottime
warnings by adding the VPFE hwmod data
- Regression fix for am43xx PRM code, simplify things
by reusing the omap4 PRM implementation
* tag 'omap-for-v4.1/fixes-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: OMAP2+: Remove bogus struct clk comparison for timer clock
ARM: AM33xx+: hwmod: re-use omap4 implementations for reset functionality
ARM: OMAP4+: PRM: add support for passing status register/bit info to reset
ARM: AM43xx: hwmod: add VPFE hwmod entries
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Emulex developers' email addresses are now "@avagotech" instead of
"@emulex". I'm also replacing Subbu with Padmanabh and Sriharsha in the
maintainers list. The driver's heading was outdated and did not include
some of the chip types (BE3, Lancer and Skyhawk) that the driver has
been supporting for a longtime. I've updated this too.
Signed-off-by: Sathya Perla <sathya.perla@avagotech.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Commit 9fd85eb502a7 ("ARM: pmu: add support for interrupt-affinity
property") added an optional "interrupt-affinity" property, to specify
the CPU affinity for each SPI listed in the interrupts property.
Without this property, we get this boot warning:
CPU PMU: Failed to parse <no-node>/interrupt-affinity[0]
This patch adds interrupt-affinity to the PMU node in the
vexpress-ca15_a7(a.k.a TC2) device tree.
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Commit 9fd85eb502a7 ("ARM: pmu: add support for interrupt-affinity
property") added an optional "interrupt-affinity" property, to specify
the CPU affinity for each SPI listed in the interrupts property.
Without this property, we get this boot warning:
CPU PMU: Failed to parse <no-node>/interrupt-affinity[0]
This patch adds interrupt-affinity to the PMU node in the
vexpress-v2p-ca9 device tree.
Signed-off-by: Robert Schwebel <r.schwebel@pengutronix.de>
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Commit d9d1f3e2d711 ("ARM: l2c: check that DT files specify the required
"cache-unified" property") mandates to specify this required property.
Without this property, we get this boot warning:
"L2C: device tree omits to specify unified cache"
This patch adds "cache-unified" property to L2 cache node in vexpress
CA9 device tree.
Signed-off-by: Robert Schwebel <r.schwebel@pengutronix.de>
Acked-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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The clock generator in IOFPGA generates the two source clocks: 32kHz and
1MHz for the SP810 System Controller.
The SP810 System Controller selects 32kHz or 1MHz as the sources for
TIM_CLK[3:0], the SP804 timer clocks. The powerup default is 32kHz but
the maximum of "refclk" and "timclk" is chosen by the SP810 driver.
This patch adds support for SP810 system controller and also fixes the
SP804 timer clock frequency.
However the SP804 driver needs to be enabled on ARM64 to test this,
which requires SP804 driver to be moved out of arch/arm.
Fixes: 71f867ec130e ("arm64: Add Juno board device tree.")
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Olof Johansson <olof@lixom.net>
Acked-by: Liviu Dudau <Liviu.Dudau@arm.com>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Back in business.
New place for my repo on github
Signed-off-by: Hans Ulli Kroll <ulli.kroll@googlemail.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into fixes
Merge "ARM: tegra: Device tree fixes for v4.1-rc3" from Thierry Reding:
This contains a fix for a bug that was introduced a couple of months ago
by a patch that git misapplied because of a lack of context.
* tag 'tegra-for-4.1-fixes-for-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
ARM: tegra: Correct which USB controller has the UTMI pad registers
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The mapping range is inclusive between starting and ending addresses.
Signed-off-by: Christian König <christian.koenig@amd.com>
CC: stable@vger.kernel.org
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Currently drm_gem_prime_import() checks if gem_prime_import_sg_table()
is implemented in DRM driver ops. However it is not necessary for
internal imports (i.e. dma_buf->ops == &drm_gem_prime_dmabuf_ops
and obj->dev == dev), which only increment reference count on respective
GEM objects.
This patch makes the helper check this condition only in case of
external imports fo rwhich importing sg table is indeed needed.
Signed-off-by: Tomasz Figa <tfiga@chromium.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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Reference-count drm_property_blob objects, changing the API to
ref/unref.
Signed-off-by: Daniel Stone <daniels@collabora.com>
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
[danvet: Squash in kerneldoc fixup from Daniel Stone.]
[danvet: Squash in Oops fix from Thiery Reding.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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CC arch/mips/kernel/smp.o
arch/mips/kernel/smp.c: In function ‘start_secondary’:
arch/mips/kernel/smp.c:149:2: error: passing argument 2 of ‘cpumask_set_cpu’ discards ‘volatile’ qualifier from pointer target type [-Werror]
cpumask_set_cpu(cpu, &cpu_callin_map);
^
In file included from ./arch/mips/include/asm/processor.h:14:0,
from ./arch/mips/include/asm/thread_info.h:15,
from include/linux/thread_info.h:54,
from include/asm-generic/preempt.h:4,
from arch/mips/include/generated/asm/preempt.h:1,
from include/linux/preempt.h:18,
from include/linux/interrupt.h:8,
from arch/mips/kernel/smp.c:24:
include/linux/cpumask.h:272:91: note: expected ‘struct cpumask *’ but argument is of type ‘volatile struct cpumask_t *’
static inline void cpumask_set_cpu(unsigned int cpu, struct cpumask *dstp)
^
arch/mips/kernel/smp.c: In function ‘smp_prepare_boot_cpu’:
arch/mips/kernel/smp.c:211:2: error: passing argument 2 of ‘cpumask_set_cpu’ discards ‘volatile’ qualifier from pointer target type [-Werror]
cpumask_set_cpu(0, &cpu_callin_map);
^
In file included from ./arch/mips/include/asm/processor.h:14:0,
from ./arch/mips/include/asm/thread_info.h:15,
from include/linux/thread_info.h:54,
from include/asm-generic/preempt.h:4,
from arch/mips/include/generated/asm/preempt.h:1,
from include/linux/preempt.h:18,
from include/linux/interrupt.h:8,
from arch/mips/kernel/smp.c:24:
include/linux/cpumask.h:272:91: note: expected ‘struct cpumask *’ but argument is of type ‘volatile struct cpumask_t *’
static inline void cpumask_set_cpu(unsigned int cpu, struct cpumask *dstp)
^
arch/mips/kernel/smp.c: In function ‘__cpu_up’:
arch/mips/kernel/smp.c:221:10: error: passing argument 2 of ‘cpumask_test_cpu’ discards ‘volatile’ qualifier from pointer target type [-Werror]
while (!cpumask_test_cpu(cpu, &cpu_callin_map))
^
In file included from ./arch/mips/include/asm/processor.h:14:0,
from ./arch/mips/include/asm/thread_info.h:15,
from include/linux/thread_info.h:54,
from include/asm-generic/preempt.h:4,
from arch/mips/include/generated/asm/preempt.h:1,
from include/linux/preempt.h:18,
from include/linux/interrupt.h:8,
from arch/mips/kernel/smp.c:24:
include/linux/cpumask.h:294:90: note: expected ‘const struct cpumask *’ but argument is of type ‘volatile struct cpumask_t *’
static inline int cpumask_test_cpu(int cpu, const struct cpumask *cpumask)
^
cc1: all warnings being treated as errors
make[2]: *** [arch/mips/kernel/smp.o] Error 1
make[1]: *** [arch/mips/kernel] Error 2
make: *** [arch/mips] Error 2
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Linus prefers kernel.org repos to github repos for security.
Signed-off-by: Doug Ledford <dledford@redhat.com>
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Pull nfsd bugfixes from Bruce Fields:
"Mainly pnfs fixes (and for problems with generic callback code made
more obvious by pnfs)"
* 'for-4.1' of git://linux-nfs.org/~bfields/linux:
nfsd: skip CB_NULL probes for 4.1 or later
nfsd: fix callback restarts
nfsd: split transport vs operation errors for callbacks
svcrpc: fix potential GSSX_ACCEPT_SEC_CONTEXT decoding failures
nfsd: fix pNFS return on close semantics
nfsd: fix the check for confirmed openowner in nfs4_preprocess_stateid_op
nfsd/blocklayout: pretend we can send deviceid notifications
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For listening endpoints bound to the wildcard address, we need to pass
the wildcard address mapping to iwpm_get_remote_info() instead of the
mapped address of the new child connection.
Without this fix, and with iwarp port mapping enabled, each iw_cxgb4
connection that is spawned from a listening endpoint bound to the wildcard
address, will generate an annoying dmesg entry about failing to find
the remote address mapping info, and the connection state displayed in
debugfs under /sys/kernel/debug/iw_cxgb4/<pci-slot-no>/eps will not have
the peer's address/port mapping info. The connection still works though.
Fixes: 5b6b8fe ("RDMA/cxgb4: Report the actual address of the remote connecting peer")
Signed-off-by: Steve Wise <swise@opengridcomputing.com>
Reviewed-by: Tatyana Nikolova <Tatyana.E.Nikolova@intel.com>
Reviewed-by: Jason Gunthorpe <jgunthorpe@obsidianresearch.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
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Using an element of a struct as the address for the memcpy of the whole
struct may introduce a buffer overflow and does not help readability either
simply pass the real thing as first argument to memcpy.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Pull spi fixes from Mark Brown:
"A number of driver specific fixes (including several missing
dependencies for randconfig type cases) plus two core fixes.
One makes the setup_transfer() callback optional which unbreaks some
drivers which had been merged with it omitted due to local versions of
this patch and another ensures that we don't corrupt data by leaking
internal dummy buffers to callers, causing the callers to think they
allocated those buffers"
* tag 'spi-fix-v4.1-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
spi: fsl-espi: fix behaviour for full-duplex xfers
spi: fsl-spi: fix devm_ioremap_resource() error case
spi: Kconfig: Add SOC_LS1021A to SPI_FSL_DSPI dependence
spi/omap2-mcpsi: Always call spi_finalize_current_message()
spi: fsl-spi: use devm_ioremap_resource() to map parameter ram on CPM1
spi: bitbang: Make setup_transfer() callback optional
spi: check tx_buf and rx_buf in spi_unmap_msg
spi: bcm2835: change timeout of polling driver to 1s
spi: bcm2835: Add GPIOLIB dependency
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/pjw/omap-pending into omap-for-v4.1/fixes
ARM: OMAP2+: first set of hwmod fixes for v4.1-rc
Fix a few AM43xx problems: add the VPFE hwmod data, which removes some
warnings; and fix the IP block hardreset implementation.
Basic build, boot, and PM test results are here:
http://www.pwsan.com/omap/testlogs/omap-hwmod-a-for-v4.1-rc/20150508130543/
Note that I do not have an AM43xx board in the testbed, and thus
cannot test on that platform.
|
|
With recent changes to use determine_rate, the comparison of two
clocks won't work without clk_is_match that does __clk_get_hw
on the clocks first.
As we've been unconditionally already calling clk_set_parent
already because of the bogus comparison, let's just remove the
check as suggested by Stephen Boyd <sboyd@codeaurora.org>.
Cc: Michael Turquette <mturquette@linaro.org>
Cc: Paul Walmsley <paul@pwsan.com>
Cc: Tero Kristo <t-kristo@ti.com>
Cc: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Tony Lindgren <tony@atomide.com>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu
Pull iommu fixes from Joerg Roedel:
"Three fixes have queued up:
- reference count fix in the AMD IOMMUv2 driver
- sign extension fix in the ARM-SMMU driver
- build fix for rockchip driver with device tree"
* tag 'iommu-fixes-v4.1-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
iommu/arm-smmu: Fix sign-extension of upstream bus addresses at stage 1
iommu/rockchip: Fix build without CONFIG_OF
iommu/amd: Fix bug in put_pasid_state_wait
|
|
Pull crypto fixes from Herbert Xu:
"This fixes a the implementation of CRC32 on arm64 where it incorrectly
applied negation on the result.
It also fixes the arm64 implementations of SHA/SHA256 where in some
cases it may end up finalising the result twice"
* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: arm64/sha2-ce - prevent asm code finalization in final() path
crypto: arm64/sha1-ce - prevent asm code finalization in final() path
crypto: arm64/crc32 - bring in line with generic CRC32
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata
Pull libata fixes from Tejun Heo:
"Rather big for fixes pull.
- SCC controllers never lived to see the light of the day. Both
libata and ide drivers removed.
- In some configurations, link power management policy changes
sometimes cause delayed spurious PHY events which can develop into
noticeable failures. This has been reported several times over the
years. Gabriele's patches suppress PHY events for a while after
LPM policy changes which should help most of these failures without
causing too much problem for hotplug use cases.
- A few controller specific fixes"
[ Hmm. I don't think removing SSC support is really a "fix", but hey, it
removes a lot of lines of code. Which I like. So ... good riddance ]
* 'for-4.1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata:
ahci: avoton port-disable reset-quirk
ata: select DW_DMAC in case of SATA_DWC
libata: Blacklist queued TRIM on all Samsung 800-series
libata: Ignore spurious PHY event on LPM policy change
libata: Add helper to determine when PHY events should be ignored
ata: ahci_st: fixup layering violations / drvdata errors
Remove celleb-only SCC PATA drivers
|
|
Pull md bugfixes from Neil Brown:
"A few fixes for md.
Most of these are related to the new "batched stripe writeout", but
there are a few others"
* tag 'md/4.1-rc3-fixes' of git://neil.brown.name/md:
md/raid5: fix handling of degraded stripes in batches.
md/raid5: fix allocation of 'scribble' array.
md/raid5: don't record new size if resize_stripes fails.
md/raid5: avoid reading parity blocks for full-stripe write to degraded array
md/raid5: more incorrect BUG_ON in handle_stripe_fill.
md/raid5: new alloc_stripe() to allocate an initialize a stripe.
md-raid0: conditional mddev->queue access to suit dm-raid
|
|
In WRED mode, the backlog for a single virtual queue (VQ) should not be
used to determine queue behavior; instead the backlog is summed across
all VQs. This sum is currently used when calculating the average queue
lengths. It also needs to be used when determining if the queue's hard
limit has been reached, or when reporting each VQ's backlog via netlink.
q->backlog will only be used if the queue switches out of WRED mode.
Signed-off-by: David Ward <david.ward@ll.mit.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
After receiving a PADT and the socket is closed, user space will no
longer drop the reference to the pppoe device.
This leads to errors like this:
[ 488.570000] unregister_netdevice: waiting for eth0.2 to become free. Usage count = 2
Fixes: 287f3a943fe ("pppoe: Use workqueue to die properly when a PADT is received")
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
Stage 1 translation is controlled by two sets of page tables (TTBR0 and
TTBR1) which grow up and down from zero respectively in the ARMv8
translation regime. For the SMMU, we only care about TTBR0 and, in the
case of a 48-bit virtual space, we expect to map virtual addresses 0x0
through to 0xffff_ffff_ffff.
Given that some masters may be incapable of emitting virtual addresses
targetting TTBR1 (e.g. because they sit on a 48-bit bus), the SMMU
architecture allows bit 47 to be sign-extended, halving the virtual
range of TTBR0 but allowing TTBR1 to be used. This is controlled by the
SEP field in TTBCR2.
The SMMU driver incorrectly enables this sign-extension feature, which
causes problems when userspace addresses are programmed into a master
device with the SMMU expecting to map the incoming transactions via
TTBR0; if the top bit of address is set, we will instead get a
translation fault since TTBR1 walks are disabled in the TTBCR.
This patch fixes the issue by disabling sign-extension of a fixed
virtual address bit and instead basing the behaviour on the upstream bus
size: the incoming address is zero extended unless the upstream bus is
only 49 bits wide, in which case bit 48 is used as the sign bit and is
replicated to the upper bits.
Cc: <stable@vger.kernel.org> # v4.0+
Reported-by: Varun Sethi <varun.sethi@freescale.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
|
|
'spi/fix/fsl-espi' into spi-linus
|
|
spi: Fixes for v4.1
A few driver fixes plus two changes for the core, one to make the
setup_transfer() callback optional which fixes crashes in some drivers
which were updated to use new interfaces without apparent testing and
one to ensure we don't expose the data buffers we use for dummy
transfers to drivers which avoids potential issues with multiple
accesses to them or reuse.
# gpg: Signature made Sat 25 Apr 2015 10:59:47 BST using RSA key ID 5D5487D0
# gpg: key CD7BEEBC: no public key for trusted key - skipped
# gpg: key CD7BEEBC marked as ultimately trusted
# gpg: key AF88CD16: no public key for trusted key - skipped
# gpg: key AF88CD16 marked as ultimately trusted
# gpg: key 16005C11: no public key for trusted key - skipped
# gpg: key 16005C11 marked as ultimately trusted
# gpg: key 5621E907: no public key for trusted key - skipped
# gpg: key 5621E907 marked as ultimately trusted
# gpg: key 5C6153AD: no public key for trusted key - skipped
# gpg: key 5C6153AD marked as ultimately trusted
# gpg: Good signature from "Mark Brown <broonie@sirena.org.uk>"
# gpg: aka "Mark Brown <broonie@debian.org>"
# gpg: aka "Mark Brown <broonie@kernel.org>"
# gpg: aka "Mark Brown <broonie@tardis.ed.ac.uk>"
# gpg: aka "Mark Brown <broonie@linaro.org>"
# gpg: aka "Mark Brown <Mark.Brown@linaro.org>"
|
|
Registering the netdev before setting the priv data is unsafe.
So fix this possible race by setting the priv data first.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Cc: <stable@vger.kernel.org> # v3.18+
Fixes: 291ab06e (net: qualcomm: new Ethernet over SPI driver for QCA7000)
Signed-off-by: David S. Miller <davem@davemloft.net>
|
|
There's a race between releasing extent buffers that are flagged as stale
and recycling them that makes us it the following BUG_ON at
btrfs_release_extent_buffer_page:
BUG_ON(extent_buffer_under_io(eb))
The BUG_ON is triggered because the extent buffer has the flag
EXTENT_BUFFER_DIRTY set as a consequence of having been reused and made
dirty by another concurrent task.
Here follows a sequence of steps that leads to the BUG_ON.
CPU 0 CPU 1 CPU 2
path->nodes[0] == eb X
X->refs == 2 (1 for the tree, 1 for the path)
btrfs_header_generation(X) == current trans id
flag EXTENT_BUFFER_DIRTY set on X
btrfs_release_path(path)
unlocks X
reads eb X
X->refs incremented to 3
locks eb X
btrfs_del_items(X)
X becomes empty
clean_tree_block(X)
clear EXTENT_BUFFER_DIRTY from X
btrfs_del_leaf(X)
unlocks X
extent_buffer_get(X)
X->refs incremented to 4
btrfs_free_tree_block(X)
X's range is not pinned
X's range added to free
space cache
free_extent_buffer_stale(X)
lock X->refs_lock
set EXTENT_BUFFER_STALE on X
release_extent_buffer(X)
X->refs decremented to 3
unlocks X->refs_lock
btrfs_release_path()
unlocks X
free_extent_buffer(X)
X->refs becomes 2
__btrfs_cow_block(Y)
btrfs_alloc_tree_block()
btrfs_reserve_extent()
find_free_extent()
gets offset == X->start
btrfs_init_new_buffer(X->start)
btrfs_find_create_tree_block(X->start)
alloc_extent_buffer(X->start)
find_extent_buffer(X->start)
finds eb X in radix tree
free_extent_buffer(X)
lock X->refs_lock
test X->refs == 2
test bit EXTENT_BUFFER_STALE is set
test !extent_buffer_under_io(eb)
increments X->refs to 3
mark_extent_buffer_accessed(X)
check_buffer_tree_ref(X)
--> does nothing,
X->refs >= 2 and
EXTENT_BUFFER_TREE_REF
is set in X
clear EXTENT_BUFFER_STALE from X
locks X
btrfs_mark_buffer_dirty()
set_extent_buffer_dirty(X)
check_buffer_tree_ref(X)
--> does nothing, X->refs >= 2 and
EXTENT_BUFFER_TREE_REF is set
sets EXTENT_BUFFER_DIRTY on X
test and clear EXTENT_BUFFER_TREE_REF
decrements X->refs to 2
release_extent_buffer(X)
decrements X->refs to 1
unlock X->refs_lock
unlock X
free_extent_buffer(X)
lock X->refs_lock
release_extent_buffer(X)
decrements X->refs to 0
btrfs_release_extent_buffer_page(X)
BUG_ON(extent_buffer_under_io(X))
--> EXTENT_BUFFER_DIRTY set on X
Fix this by making find_extent buffer wait for any ongoing task currently
executing free_extent_buffer()/free_extent_buffer_stale() if the extent
buffer has the stale flag set.
A more clean alternative would be to always increment the extent buffer's
reference count while holding its refs_lock spinlock but find_extent_buffer
is a performance critical area and that would cause lock contention whenever
multiple tasks search for the same extent buffer concurrently.
A build server running a SLES 12 kernel (3.12 kernel + over 450 upstream
btrfs patches backported from newer kernels) was hitting this often:
[1212302.461948] kernel BUG at ../fs/btrfs/extent_io.c:4507!
(...)
[1212302.470219] CPU: 1 PID: 19259 Comm: bs_sched Not tainted 3.12.36-38-default #1
[1212302.540792] Hardware name: Supermicro PDSM4/PDSM4, BIOS 6.00 04/17/2006
[1212302.540792] task: ffff8800e07e0100 ti: ffff8800d6412000 task.ti: ffff8800d6412000
[1212302.540792] RIP: 0010:[<ffffffffa0507081>] [<ffffffffa0507081>] btrfs_release_extent_buffer_page.constprop.51+0x101/0x110 [btrfs]
(...)
[1212302.630008] Call Trace:
[1212302.630008] [<ffffffffa05070cd>] release_extent_buffer+0x3d/0xa0 [btrfs]
[1212302.630008] [<ffffffffa04c2d9d>] btrfs_release_path+0x1d/0xa0 [btrfs]
[1212302.630008] [<ffffffffa04c5c7e>] read_block_for_search.isra.33+0x13e/0x3a0 [btrfs]
[1212302.630008] [<ffffffffa04c8094>] btrfs_search_slot+0x3f4/0xa80 [btrfs]
[1212302.630008] [<ffffffffa04cf5d8>] lookup_inline_extent_backref+0xf8/0x630 [btrfs]
[1212302.630008] [<ffffffffa04d13dd>] __btrfs_free_extent+0x11d/0xc40 [btrfs]
[1212302.630008] [<ffffffffa04d64a4>] __btrfs_run_delayed_refs+0x394/0x11d0 [btrfs]
[1212302.630008] [<ffffffffa04db379>] btrfs_run_delayed_refs.part.66+0x69/0x280 [btrfs]
[1212302.630008] [<ffffffffa04ed2ad>] __btrfs_end_transaction+0x2ad/0x3d0 [btrfs]
[1212302.630008] [<ffffffffa04f7505>] btrfs_evict_inode+0x4a5/0x500 [btrfs]
[1212302.630008] [<ffffffff811b9e28>] evict+0xa8/0x190
[1212302.630008] [<ffffffff811b0330>] do_unlinkat+0x1a0/0x2b0
I was also able to reproduce this on a 3.19 kernel, corresponding to Chris'
integration branch from about a month ago, running the following stress
test on a qemu/kvm guest (with 4 virtual cpus and 16Gb of ram):
while true; do
mkfs.btrfs -l 4096 -f -b `expr 20 \* 1024 \* 1024 \* 1024` /dev/sdd
mount /dev/sdd /mnt
snapshot_cmd="btrfs subvolume snapshot -r /mnt"
snapshot_cmd="$snapshot_cmd /mnt/snap_\`date +'%H_%M_%S_%N'\`"
fsstress -d /mnt -n 25000 -p 8 -x "$snapshot_cmd" -X 100
umount /mnt
done
Which usually triggers the BUG_ON within less than 24 hours:
[49558.618097] ------------[ cut here ]------------
[49558.619732] kernel BUG at fs/btrfs/extent_io.c:4551!
(...)
[49558.620031] CPU: 3 PID: 23908 Comm: fsstress Tainted: G W 3.19.0-btrfs-next-7+ #3
[49558.620031] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.7.5-0-ge51488c-20140602_164612-nilsson.home.kraxel.org 04/01/2014
[49558.620031] task: ffff8800319fc0d0 ti: ffff880220da8000 task.ti: ffff880220da8000
[49558.620031] RIP: 0010:[<ffffffffa0476b1a>] [<ffffffffa0476b1a>] btrfs_release_extent_buffer_page+0x20/0xe9 [btrfs]
(...)
[49558.620031] Call Trace:
[49558.620031] [<ffffffffa0476c73>] release_extent_buffer+0x90/0xd3 [btrfs]
[49558.620031] [<ffffffff8142b10c>] ? _raw_spin_lock+0x3b/0x43
[49558.620031] [<ffffffffa0477052>] ? free_extent_buffer+0x37/0x94 [btrfs]
[49558.620031] [<ffffffffa04770ab>] free_extent_buffer+0x90/0x94 [btrfs]
[49558.620031] [<ffffffffa04396d5>] btrfs_release_path+0x4a/0x69 [btrfs]
[49558.620031] [<ffffffffa0444907>] __btrfs_free_extent+0x778/0x80c [btrfs]
[49558.620031] [<ffffffffa044a485>] __btrfs_run_delayed_refs+0xad2/0xc62 [btrfs]
[49558.728054] [<ffffffff811420d5>] ? kmemleak_alloc_recursive.constprop.52+0x16/0x18
[49558.728054] [<ffffffffa044c1e8>] btrfs_run_delayed_refs+0x6d/0x1ba [btrfs]
[49558.728054] [<ffffffffa045917f>] ? join_transaction.isra.9+0xb9/0x36b [btrfs]
[49558.728054] [<ffffffffa045a75c>] btrfs_commit_transaction+0x4c/0x981 [btrfs]
[49558.728054] [<ffffffffa0434f86>] btrfs_sync_fs+0xd5/0x10d [btrfs]
[49558.728054] [<ffffffff81155923>] ? iterate_supers+0x60/0xc4
[49558.728054] [<ffffffff8117966a>] ? do_sync_work+0x91/0x91
[49558.728054] [<ffffffff8117968a>] sync_fs_one_sb+0x20/0x22
[49558.728054] [<ffffffff81155939>] iterate_supers+0x76/0xc4
[49558.728054] [<ffffffff811798e8>] sys_sync+0x55/0x83
[49558.728054] [<ffffffff8142bbd2>] system_call_fastpath+0x12/0x17
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
|
|
So creating a block group has 2 distinct phases:
Phase 1 - creates the btrfs_block_group_cache item and adds it to the
rbtree fs_info->block_group_cache_tree and to the corresponding list
space_info->block_groups[];
Phase 2 - adds the block group item to the extent tree and corresponding
items to the chunk tree.
The first phase adds the block_group_cache_item to a list of pending block
groups in the transaction handle, and phase 2 happens when
btrfs_end_transaction() is called against the transaction handle.
It happens that once phase 1 completes, other concurrent tasks that use
their own transaction handle, but points to the same running transaction
(struct btrfs_trans_handle->transaction), can use this block group for
space allocations and therefore mark it dirty. Dirty block groups are
tracked in a list belonging to the currently running transaction (struct
btrfs_transaction) and not in the transaction handle (btrfs_trans_handle).
This is a problem because once a task calls btrfs_commit_transaction(),
it calls btrfs_start_dirty_block_groups() which will see all dirty block
groups and attempt to start their writeout, including those that are
still attached to the transaction handle of some concurrent task that
hasn't called btrfs_end_transaction() yet - which means those block
groups haven't gone through phase 2 yet and therefore when
write_one_cache_group() is called, it won't find the block group items
in the extent tree and abort the current transaction with -ENOENT,
turning the fs into readonly mode and require a remount.
Fix this by ignoring -ENOENT when looking for block group items in the
extent tree when we attempt to start the writeout of the block group
caches outside the critical section of the transaction commit. We will
try again later during the critical section and if there we still don't
find the block group item in the extent tree, we then abort the current
transaction.
This issue happened twice, once while running fstests btrfs/067 and once
for btrfs/078, which produced the following trace:
[ 3278.703014] WARNING: CPU: 7 PID: 18499 at fs/btrfs/super.c:260 __btrfs_abort_transaction+0x52/0x114 [btrfs]()
[ 3278.707329] BTRFS: Transaction aborted (error -2)
(...)
[ 3278.731555] Call Trace:
[ 3278.732396] [<ffffffff8142fa46>] dump_stack+0x4f/0x7b
[ 3278.733860] [<ffffffff8108b6a2>] ? console_unlock+0x361/0x3ad
[ 3278.735312] [<ffffffff81045ea5>] warn_slowpath_common+0xa1/0xbb
[ 3278.736874] [<ffffffffa03ada6d>] ? __btrfs_abort_transaction+0x52/0x114 [btrfs]
[ 3278.738302] [<ffffffff81045f05>] warn_slowpath_fmt+0x46/0x48
[ 3278.739520] [<ffffffffa03ada6d>] __btrfs_abort_transaction+0x52/0x114 [btrfs]
[ 3278.741222] [<ffffffffa03b9e56>] write_one_cache_group+0xae/0xbf [btrfs]
[ 3278.742797] [<ffffffffa03c487b>] btrfs_start_dirty_block_groups+0x170/0x2b2 [btrfs]
[ 3278.744492] [<ffffffffa03d309c>] btrfs_commit_transaction+0x130/0x9c9 [btrfs]
[ 3278.746084] [<ffffffff8107d33d>] ? trace_hardirqs_on+0xd/0xf
[ 3278.747249] [<ffffffffa03e5660>] btrfs_sync_file+0x313/0x387 [btrfs]
[ 3278.748744] [<ffffffff8117acad>] vfs_fsync_range+0x95/0xa4
[ 3278.749958] [<ffffffff81435b54>] ? ret_from_sys_call+0x1d/0x58
[ 3278.751218] [<ffffffff8117acd8>] vfs_fsync+0x1c/0x1e
[ 3278.754197] [<ffffffff8117ae54>] do_fsync+0x34/0x4e
[ 3278.755192] [<ffffffff8117b07c>] SyS_fsync+0x10/0x14
[ 3278.756236] [<ffffffff81435b32>] system_call_fastpath+0x12/0x17
[ 3278.757366] ---[ end trace 9a4d4df4969709aa ]---
Fixes: 1bbc621ef284 ("Btrfs: allow block group cache writeout
outside critical section in commit")
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
|
|
When waiting for the writeback of block group cache we returned
immediately if there was an error during writeback without waiting
for the ordered extent to complete. This left a short time window
where if some other task attempts to start the writeout for the same
block group cache it can attempt to add a new ordered extent, starting
at the same offset (0) before the previous one is removed from the
ordered tree, causing an ordered tree panic (calls BUG()).
This normally doesn't happen in other write paths, such as buffered
writes or direct IO writes for regular files, since before marking
page ranges dirty we lock the ranges and wait for any ordered extents
within the range to complete first.
Fix this by making btrfs_wait_ordered_range() not return immediately
if it gets an error from the writeback, waiting for all ordered extents
to complete first.
This issue happened often when running the fstest btrfs/088 and it's
easy to trigger it by running in a loop until the panic happens:
for ((i = 1; i <= 10000; i++)) do ./check btrfs/088 ; done
[17156.862573] BTRFS critical (device sdc): panic in ordered_data_tree_panic:70: Inconsistency in ordered tree at offset 0 (errno=-17 Object already exists)
[17156.864052] ------------[ cut here ]------------
[17156.864052] kernel BUG at fs/btrfs/ordered-data.c:70!
(...)
[17156.864052] Call Trace:
[17156.864052] [<ffffffffa03876e3>] btrfs_add_ordered_extent+0x12/0x14 [btrfs]
[17156.864052] [<ffffffffa03787e2>] run_delalloc_nocow+0x5bf/0x747 [btrfs]
[17156.864052] [<ffffffffa03789ff>] run_delalloc_range+0x95/0x353 [btrfs]
[17156.864052] [<ffffffffa038b7fe>] writepage_delalloc.isra.16+0xb9/0x13f [btrfs]
[17156.864052] [<ffffffffa038d75b>] __extent_writepage+0x129/0x1f7 [btrfs]
[17156.864052] [<ffffffffa038da5a>] extent_write_cache_pages.isra.15.constprop.28+0x231/0x2f4 [btrfs]
[17156.864052] [<ffffffff810ad2af>] ? __module_text_address+0x12/0x59
[17156.864052] [<ffffffff8107d33d>] ? trace_hardirqs_on+0xd/0xf
[17156.864052] [<ffffffffa038df76>] extent_writepages+0x4b/0x5c [btrfs]
[17156.864052] [<ffffffff81144431>] ? kmem_cache_free+0x9b/0xce
[17156.864052] [<ffffffffa0376a46>] ? btrfs_submit_direct+0x3fc/0x3fc [btrfs]
[17156.864052] [<ffffffffa0389cd6>] ? free_extent_state+0x8c/0xc1 [btrfs]
[17156.864052] [<ffffffffa0374871>] btrfs_writepages+0x28/0x2a [btrfs]
[17156.864052] [<ffffffff8110c4c8>] do_writepages+0x23/0x2c
[17156.864052] [<ffffffff81102f36>] __filemap_fdatawrite_range+0x5a/0x61
[17156.864052] [<ffffffff81102f6e>] filemap_fdatawrite_range+0x13/0x15
[17156.864052] [<ffffffffa0383ef7>] btrfs_fdatawrite_range+0x21/0x48 [btrfs]
[17156.864052] [<ffffffffa03ab89e>] __btrfs_write_out_cache.isra.14+0x2d9/0x3a7 [btrfs]
[17156.864052] [<ffffffffa03ac1ab>] ? btrfs_write_out_cache+0x41/0xdc [btrfs]
[17156.864052] [<ffffffffa03ac1fd>] btrfs_write_out_cache+0x93/0xdc [btrfs]
[17156.864052] [<ffffffffa0363847>] ? btrfs_start_dirty_block_groups+0x13a/0x2b2 [btrfs]
[17156.864052] [<ffffffffa03638e6>] btrfs_start_dirty_block_groups+0x1d9/0x2b2 [btrfs]
[17156.864052] [<ffffffff8107d33d>] ? trace_hardirqs_on+0xd/0xf
[17156.864052] [<ffffffffa037209e>] btrfs_commit_transaction+0x130/0x9c9 [btrfs]
[17156.864052] [<ffffffffa034c748>] btrfs_sync_fs+0xe1/0x12d [btrfs]
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
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If the writeback of an inode cache failed we were unnecessarilly
attempting to release again the delalloc metadata that we previously
reserved. However attempting to do this a second time triggers an
assertion at drop_outstanding_extent() because we have no more
outstanding extents for our inode cache's inode. If we were able
to start writeback of the cache the reserved metadata space is
released at btrfs_finished_ordered_io(), even if an error happens
during writeback.
So make sure we don't repeat the metadata space release if writeback
started for our inode cache.
This issue was trivial to reproduce by running the fstest btrfs/088
with "-o inode_cache", which triggered the assertion leading to a
BUG() call and requiring a reboot in order to run the remaining
fstests. Trace produced by btrfs/088:
[255289.385904] BTRFS: assertion failed: BTRFS_I(inode)->outstanding_extents >= num_extents, file: fs/btrfs/extent-tree.c, line: 5276
[255289.388094] ------------[ cut here ]------------
[255289.389184] kernel BUG at fs/btrfs/ctree.h:4057!
[255289.390125] invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
(...)
[255289.392068] Call Trace:
[255289.392068] [<ffffffffa035e774>] drop_outstanding_extent+0x3d/0x6d [btrfs]
[255289.392068] [<ffffffffa0364988>] btrfs_delalloc_release_metadata+0x54/0xe3 [btrfs]
[255289.392068] [<ffffffffa03b4174>] btrfs_write_out_ino_cache+0x95/0xad [btrfs]
[255289.392068] [<ffffffffa036f5c4>] btrfs_save_ino_cache+0x275/0x2dc [btrfs]
[255289.392068] [<ffffffffa03e2d83>] commit_fs_roots.isra.12+0xaa/0x137 [btrfs]
[255289.392068] [<ffffffff8107d33d>] ? trace_hardirqs_on+0xd/0xf
[255289.392068] [<ffffffffa037841f>] ? btrfs_commit_transaction+0x4b1/0x9c9 [btrfs]
[255289.392068] [<ffffffff814351a4>] ? _raw_spin_unlock+0x32/0x46
[255289.392068] [<ffffffffa037842e>] btrfs_commit_transaction+0x4c0/0x9c9 [btrfs]
(...)
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
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