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546,481 commits

Author SHA1 Message Date
Toshiaki Makita
df356d5e81 bridge: Fix network header pointer for vlan tagged packets
There are several devices that can receive vlan tagged packets with
CHECKSUM_PARTIAL like tap, possibly veth and xennet.
When (multiple) vlan tagged packets with CHECKSUM_PARTIAL are forwarded
by bridge to a device with the IP_CSUM feature, they end up with checksum
error because before entering bridge, the network header is set to
ETH_HLEN (not including vlan header length) in __netif_receive_skb_core(),
get_rps_cpu(), or drivers' rx functions, and nobody fixes the pointer later.

Since the network header is exepected to be ETH_HLEN in flow-dissection
and hash-calculation in RPS in rx path, and since the header pointer fix
is needed only in tx path, set the appropriate network header on forwarding
packets.

Signed-off-by: Toshiaki Makita <makita.toshiaki@lab.ntt.co.jp>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-07-29 12:20:16 -07:00
Kan Liang
c421e80b10 perf tools: Introduce callgraph_set for callgraph option
Introduce callgraph_set to indicate whether the callgraph option was set
by user.

Signed-off-by: Kan Liang <kan.liang@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/1438162936-59698-4-git-send-email-kan.liang@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-07-29 16:18:45 -03:00
Jiri Olsa
ee4c75887d perf tools: Force period term to overload global settings
Currently the command line option settings beats the per event period
settings:

With no global settings, we get per-event configuration:

  $ perf record -e 'cpu/instructions,period=20000/' sleep 1
  $ perf evlist -v
  ... { sample_period, sample_freq }: 20000 ...

With 'c' option period setup, we get 'c' option value:
  $ perf record -e 'cpu/instructions,period=20000/' -c 1000 sleep 1
  $ perf evlist -v
  ... { sample_period, sample_freq }: 1000 ...

This patch makes the per-event settings overload the global 'c' option
setup:

  $ perf record -e 'cpu/instructions,period=20000/' -c 1000 sleep 1
  $ perf evlist -v
  ... { sample_period, sample_freq }: 20000 ...

I think the making the per-event settings to overload any other config
makes more sense than current state. However it breaks the current
'period' term handling, which might cause some noise.. so let's see ;-).

Also fixing parse event tests with the new behaviour.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/1438162936-59698-3-git-send-email-kan.liang@intel.com
Signed-off-by: Kan Liang <kan.liang@intel.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-07-29 16:18:21 -03:00
Jiri Olsa
930a2e2975 perf tools: Add support for event post configuration
Add support to overload any global settings for event and force user
specified term value. It will be useful for new time and backtrace
terms.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/1438162936-59698-2-git-send-email-kan.liang@intel.com
Signed-off-by: Kan Liang <kan.liang@intel.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-07-29 16:15:57 -03:00
Bjorn Andersson
ba68227e61 devicetree: soc: Add Qualcomm SMD based RPM DT binding
Add binding documentation for the Qualcomm Resource Power Manager (RPM)
using shared memory (Qualcomm SMD) as transport mechanism. This is found
in 8974 and newer based devices.

The binding currently describes the rpm itself and the regulator
subnodes.

Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: Andy Gross <agross@codeaurora.org>
2015-07-29 14:13:48 -05:00
Bjorn Andersson
936f14cf4e soc: qcom: Driver for the Qualcomm RPM over SMD
Driver for the Resource Power Manager (RPM) found in Qualcomm 8974 based
devices.
The driver exposes resources that child drivers can operate on; to
implementing regulator, clock and bus frequency drivers.

Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: Andy Gross <agross@codeaurora.org>
2015-07-29 14:13:48 -05:00
Bjorn Andersson
f2ab3298fb soc: qcom: Add Shared Memory Driver
This adds the Qualcomm Shared Memory Driver (SMD) providing
communication channels to remote processors, ontop of SMEM.

Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: Andy Gross <agross@codeaurora.org>
2015-07-29 14:13:48 -05:00
Bjorn Andersson
72c10fef98 soc: qcom: Add device tree binding for Shared Memory Device
Add device tree binding documentation for the Qualcomm Shared Memory
Device, used for communication between the various CPUs in the Qualcomm
SoCs.

Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
Signed-off-by: Andy Gross <agross@codeaurora.org>
2015-07-29 14:13:48 -05:00
Mike Snitzer
795e633a2d dm cache: fix device destroy hang due to improper prealloc_used accounting
Commit 665022d72f ("dm cache: avoid calls to prealloc_free_structs() if
possible") introduced a regression that caused the removal of a DM cache
device to hang in cache_postsuspend()'s call to wait_for_migrations()
with the following stack trace:

  [<ffffffff81651457>] schedule+0x37/0x80
  [<ffffffffa041e21b>] cache_postsuspend+0xbb/0x470 [dm_cache]
  [<ffffffff810ba970>] ? prepare_to_wait_event+0xf0/0xf0
  [<ffffffffa0006f77>] dm_table_postsuspend_targets+0x47/0x60 [dm_mod]
  [<ffffffffa0001eb5>] __dm_destroy+0x215/0x250 [dm_mod]
  [<ffffffffa0004113>] dm_destroy+0x13/0x20 [dm_mod]
  [<ffffffffa00098cd>] dev_remove+0x10d/0x170 [dm_mod]
  [<ffffffffa00097c0>] ? dev_suspend+0x240/0x240 [dm_mod]
  [<ffffffffa0009f85>] ctl_ioctl+0x255/0x4d0 [dm_mod]
  [<ffffffff8127ac00>] ? SYSC_semtimedop+0x280/0xe10
  [<ffffffffa000a213>] dm_ctl_ioctl+0x13/0x20 [dm_mod]
  [<ffffffff811fd432>] do_vfs_ioctl+0x2d2/0x4b0
  [<ffffffff81117d5f>] ? __audit_syscall_entry+0xaf/0x100
  [<ffffffff81022636>] ? do_audit_syscall_entry+0x66/0x70
  [<ffffffff811fd689>] SyS_ioctl+0x79/0x90
  [<ffffffff81023e58>] ? syscall_trace_leave+0xb8/0x110
  [<ffffffff81654f6e>] entry_SYSCALL_64_fastpath+0x12/0x71

Fix this by accounting for the call to prealloc_data_structs()
immediately _before_ the call as opposed to after.  This is needed
because it is possible to break out of the control loop after the call
to prealloc_data_structs() but before prealloc_used was set to true.

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2015-07-29 14:32:09 -04:00
Mike Snitzer
3508e6590d Revert "dm cache: do not wake_worker() in free_migration()"
This reverts commit 386cb7cdee.

Taking the wake_worker() out of free_migration() will slow writeback
dramatically, and hence adaptability.

Say we have 10k blocks that need writing back, but are only able to
issue 5 concurrently due to the migration bandwidth: it's imperative
that we wake_worker() immediately after migration completion; waiting
for the next 1 second wake up (via do_waker) means it'll take a long
time to write that all back.

Reported-by: Joe Thornber <ejt@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
2015-07-29 14:32:08 -04:00
Dan Carpenter
3294bee870 clk: versatile: off by one in clk_sp810_timerclken_of_get()
The ">" should be ">=" or we end up reading beyond the end of the array.

Fixes: 6e973d2c43 ('clk: vexpress: Add separate SP810 driver')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Pawel Moll <pawel.moll@arm.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2015-07-29 11:25:23 -07:00
U. Artie Eoff
342e844905 ALSA: hda - Fix race between PM ops and HDA init/probe
PM ops could be triggered before HDA is done initializing
and cause PM to set HDA controller to D3Hot.  This can result
in "CORB reset timeout#2, CORBRP = 65535" and "no codecs
initialized".  Additionally, PM ops can be triggered before
azx_probe_continue finishes (async probe).  This can result
in a NULL deref kernel crash.

To fix this, avoid PM ops if !chip->running.

Signed-off-by: U. Artie Eoff <ullysses.a.eoff@intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2015-07-29 19:37:26 +02:00
Ard Biesheuvel
6c020ea8dc arm64/Documentation: clarify wording regarding memory below the Image
Clarify that the memory below the start of the image but inside the
region covered by the linear mapping has no special significance to
the kernel, and may be used by the firmware provided that it is marked
as reserved.

Also, fix up some whitespace errors.

Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2015-07-29 18:32:10 +01:00
Will Deacon
484c96dbb2 arm64: lse: fix lse cmpxchg code indentation
For some reason, the ll/sc cmpxchg asm is all off to the left and
awkward to read in conjunction with the following (correctly indented)
LSE version.

This patch shifts the ll/sc code back to where it should be.

Signed-off-by: Will Deacon <will.deacon@arm.com>
2015-07-29 18:32:09 +01:00
Jonas Rabenstein
63a581865e arm64: remove redundant object file list
Commit 4b3dc9679c ("arm64: force CONFIG_SMP=y and remove redundant
#ifdefs") forces SMP on arm64. To build the necessary objects for SMP,
they were added to the arm64-obj-y rule in arch/arm64/kernel/Makefile,
without removing the arm64-obj-$(CONFIG_SMP) rule.

Remove redundant object file list depending on always-yes CONFIG_SMP in
arch/arm64/kernel/Makefile.

Signed-off-by: Jonas Rabenstein <jonas.rabenstein@studium.uni-erlangen.de>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2015-07-29 18:32:09 +01:00
Jonas Rabenstein
377bcff9a3 arm64: remove dead-code depending on CONFIG_UP_LATE_INIT
Commit 4b3dc9679c ("arm64: force CONFIG_SMP=y and remove redundant
and therfore can not be selected anymore.

Remove dead #ifdef-block depending on UP_LATE_INIT in
arch/arm64/kernel/setup.c

Signed-off-by: Jonas Rabenstein <jonas.rabenstein@studium.uni-erlangen.de>
[will: kill do_post_cpus_up_work altogether]
Signed-off-by: Will Deacon <will.deacon@arm.com>
2015-07-29 18:32:09 +01:00
Linus Torvalds
86ea07ca84 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 fixes from Martin Schwidefsky:
 "Two bug fixes:

   - fix a crash on pre-z10 hardware due to cache-info

   - fix an issue with classic BPF programs in the eBPF JIT"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/cachinfo: add missing facility check to init_cache_level()
  s390/bpf: clear correct BPF accumulator register
2015-07-29 10:23:14 -07:00
Martin Sperl
0122a51830 spi: bcm2835: fix overflow in calculation of transfer time
This resulted in the use of polling mode when other approaches
(dma or interrupts) would have been more appropriate.

Happened for transfers longer than 477 bytes.

Reported-by: Noralf Tronnes <noralf@tronnes.org>
Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2015-07-29 18:22:04 +01:00
Martin Sperl
acace73df2 spi: bcm2835: set up spi-mode before asserting cs-gpio
When using reverse polarity for clock (spi-cpol) on a device
the clock line gets altered after chip-select has been asserted
resulting in an additional clock beat, which confuses hardware.

This did not show when using native-CS, as the same register
is used to control cs as well as polarity, so the changes came
into effect at the same time. Unfortunately this is not true
with gpio-cs.

To avoid this situation this patch moves the setup of polarity
(spi-cpol and spi-cpha) outside of the chip-select into
prepare_message, which is run prior to asserting chip-select.

Also fixes resetting 3-wire mode after use of rx-mode, so that
a 3-Wire sequence TX, RX, TX works as well (right now it runs
TX, RX, RX instead)

Reported-by: Noralf Tronnes <noralf@tronnes.org>
Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
2015-07-29 18:22:04 +01:00
Linus Torvalds
d9065f44be VFIO fixes for v4.2
- Fix a lockdep reported deadlock in device open error path (Alex Williamson)
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Merge tag 'vfio-v4.2-rc5' of git://github.com/awilliam/linux-vfio

Pull VFIO fix from Alex Williamson:
 "Fix a lockdep reported deadlock in device open error path"

* tag 'vfio-v4.2-rc5' of git://github.com/awilliam/linux-vfio:
  vfio: Fix lockdep issue
2015-07-29 10:17:55 -07:00
Kukjin Kim
d306d08f07 ARM: SAMSUNG: remove keypad-core header in plat-samsung
Since keypad-core header is not used, this patch removes it.

Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Cc: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-07-30 02:02:06 +09:00
Kukjin Kim
96bc024cdc ARM: SAMSUNG: local watchdog-reset header in mach-s3c64xx
This patch moves watchdog-reset header file into mach-s3c64xx.
Because it is not used for others except mach-s3c64xx.

Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-07-30 02:00:52 +09:00
Kukjin Kim
fe31d04416 ARM: SAMSUNG: local onenand-core header in mach-s3c64xx
This patch moves onenand-core header file into mach-s3c64xx.
Because it is not used for others except mach-s3c64xx.

Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-07-30 02:00:47 +09:00
Kukjin Kim
876ba9bafb ARM: SAMSUNG: local irq-uart header in mach-s3c64xx
This patch moves irq-uart header file into mach-s3c64xx.
Because it is not used for others except mach-s3c64xx.

Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-07-30 02:00:38 +09:00
Kukjin Kim
4a7bf56f7f ARM: SAMSUNG: local backlight header in mach-s3c64xx
This patch moves backlight header file into mach-s3c64xx.
Because it is not used for others except mach-s3c64xx.

Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-07-30 02:00:36 +09:00
Kukjin Kim
e979b1a9b4 ARM: SAMSUNG: local ata-core header in mach-s3c64xx
This patch moves ata-core header file into mach-s3c64xx.
Because it is not used for others except mach-s3c64xx.

Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-07-30 02:00:36 +09:00
Kukjin Kim
3b0a5a96d0 ARM: SAMSUNG: local regs-usb-hsotg-phy header in mach-s3c64xx
This patch moves regs-usb-hsotg-phy header file into mach-s3c64xx.
Because it is not used for others except mach-s3c64xx.

Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-07-30 02:00:36 +09:00
Kukjin Kim
dd04e47e74 ARM: SAMSUNG: local spi-core header in mach-s3c24xx
This patch moves spi-core header file into mach-s3c24xx.
Because it is not used for others except mach-s3c24xx.

Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-07-30 02:00:35 +09:00
Kukjin Kim
f8eed6cd0d ARM: SAMSUNG: local nand-core header in mach-s3c24xx
This patch moves nand-core header file into mach-s3c24xx.
Because it is not used for others except mach-s3c24xx.

Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-07-30 02:00:35 +09:00
Kukjin Kim
f30e3295d2 ARM: SAMSUNG: local fb-core header in mach-s3c24xx
This patch moves fb-core header file into mach-s3c24xx.
Because it is not used for others except mach-s3c24xx.

Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-07-30 02:00:35 +09:00
Kukjin Kim
8ace438f4c ARM: SAMSUNG: local regs-srom header in mach-exynos
This patch moves regs-srom header file into mach-exynos.
Because it is not used for others except mach-exynos.

Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-07-30 02:00:35 +09:00
Linus Torvalds
733db573a6 Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending
Pull SCSI target fixes from Nicholas Bellinger:
 "This series is larger than what I'd normally be conformable with
  sending for a -rc5 PULL request..

  However, the bulk of the series is localized to qla2xxx target
  specific fixes that address a number of real-world correctness issues,
  that have been outstanding on the list for ~6 weeks now.  They where
  submitted + verified + acked by the HW LLD vendor, contributed by a
  major production customer of the code, and are marked for v3.18.y
  stable code.

  That said, I don't see a good reason to wait another month to get
  these fixes into mainline.

  Beyond the qla2xx specific fixes, this series also includes:

   - bugfix for a long standing use-after-free in iscsi-target during
     TPG shutdown + demo-mode sessions.

   - bugfix for a >= v4.0 regression OOPs in iscsi-target during a
     iscsi_start_kthreads() failure.

   - bugfix for a >= v4.0 regression hang in iscsi-target for iser
     explicit session/connection logout.

   - bugfix for a iser-target bug where a early CMA REJECTED status
     during login triggers a NULL pointer dereference OOPs.

   - bugfixes for a handful of v4.2-rc1 specific regressions related to
     the larger set of recent backend configfs attribute changes.

  A big thanks to QLogic + Pure Storage for the qla2xxx target bugfixes"

* git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending: (28 commits)
  Documentation/target: Fix tcm_mod_builder.py build breakage
  iser-target: Fix REJECT CM event use-after-free OOPs
  iscsi-target: Fix iser explicit logout TX kthread leak
  iscsi-target: Fix iscsit_start_kthreads failure OOPs
  iscsi-target: Fix use-after-free during TPG session shutdown
  qla2xxx: terminate exchange when command is aborted by LIO
  qla2xxx: drop cmds/tmrs arrived while session is being deleted
  qla2xxx: disable scsi_transport_fc registration in target mode
  qla2xxx: added sess generations to detect RSCN update races
  qla2xxx: Abort stale cmds on qla_tgt_wq when plogi arrives
  qla2xxx: delay plogi/prli ack until existing sessions are deleted
  qla2xxx: cleanup cmd in qla workqueue before processing TMR
  qla2xxx: kill sessions/log out initiator on RSCN and port down events
  qla2xxx: fix command initialization in target mode.
  qla2xxx: Remove msleep in qlt_send_term_exchange
  qla2xxx: adjust debug flags
  qla2xxx: release request queue reservation.
  qla2xxx: Add flush after updating ATIOQ consumer index.
  qla2xxx: Enable target mode for ISP27XX
  qla2xxx: Fix hardware lock/unlock issue causing kernel panic.
  ...
2015-07-29 09:54:40 -07:00
Kukjin Kim
b93b315d44 ARM: SAMSUNG: make local s5p-dev-mfc in mach-exynos
This patch moves s5p-dev-mfc from plat-samsung into mach-exynos
because it is used for only exynos no other platforms.

Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-07-30 01:49:00 +09:00
Kukjin Kim
7f798c1c0d ARM: SAMSUNG: make local dev-backlight in mach-s3c64xx
This patch moves dev-backlight from plat-samsung into mach-s3c64xx
because it is used for only s3c64xx no other platforms.

Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-07-30 01:48:58 +09:00
Kukjin Kim
a1bd8d8bb8 ARM: SAMSUNG: make local setup-camif in mach-s3c24xx
This patch moves setup-camif from plat-samsung into mach-s3c24xx
because it can be used only for s3c24xx no other platforms.

Cc: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Kukjin Kim <kgene@kernel.org>
2015-07-30 01:48:44 +09:00
Arnaldo Carvalho de Melo
4c7de49a29 perf session env: Rename exit method
The semantic associated in tools/perf/ with foo__delete(instance) is to
release all resources referenced by 'instance' members and then release
the memory for 'instance' itself.

The perf_session_env__delete() function isn't doing this, it just does
the first part, but the space used by 'instance' itself isn't freed, as
it is embedded in a larger structure, that will be freed at other stage.

For these cases we se foo__exit(), i.e. the usage is:

 void foo__delete(foo)
 {
         if (foo) {
                 foo__exit(foo);
                 free(foo);
         }
 }

But when we have something like:

 struct bar {
         struct foo foo;
         . . .
 }

Then we can't really call foo__delete(&bar.foo), we must have this
instead:

 void bar__exit(bar)
 {
         foo__exit(&bar.foo);
         /* free other bar-> resources */
 }

 void bar__delete(bar)
 {
         if (bar) {
		bar__exit(bar);
                free(bar);
         }
 }

So just rename perf_session_env__delete() to perf_session_env__exit().

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-djbgpcfo5udqptx3q0flwtmk@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2015-07-29 12:59:03 -03:00
Jeff Mahoney
e33e17ee10 btrfs: add missing discards when unpinning extents with -o discard
When we clear the dirty bits in btrfs_delete_unused_bgs for extents
in the empty block group, it results in btrfs_finish_extent_commit being
unable to discard the freed extents.

The block group removal patch added an alternate path to forget extents
other than btrfs_finish_extent_commit.  As a result, any extents that
would be freed when the block group is removed aren't discarded.  In my
test run, with a large copy of mixed sized files followed by removal, it
left nearly 2/3 of extents undiscarded.

To clean up the block groups, we add the removed block group onto a list
that will be discarded after transaction commit.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Tested-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
2015-07-29 08:15:29 -07:00
Jeff Mahoney
e44163e177 btrfs: explictly delete unused block groups in close_ctree and ro-remount
The cleaner thread may already be sleeping by the time we enter
close_ctree.  If that's the case, we'll skip removing any unused
block groups queued for removal, even during a normal umount.
They'll be cleaned up automatically at next mount, but users
expect a umount to be a clean synchronization point, especially
when used on thin-provisioned storage with -odiscard.  We also
explicitly remove unused block groups in the ro-remount path
for the same reason.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Tested-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
2015-07-29 08:15:27 -07:00
Jeff Mahoney
499f377f49 btrfs: iterate over unused chunk space in FITRIM
Since we now clean up block groups automatically as they become
empty, iterating over block groups is no longer sufficient to discard
unused space.

This patch iterates over the unused chunk space and discards any regions
that are unallocated, regardless of whether they were ever used.  This is
a change for btrfs but is consistent with other file systems.

We do this in a transactionless manner since the discard process can take
a substantial amount of time and a transaction would need to be started
before the acquisition of the device list lock.  That would mean a
transaction would be held open across /all/ of the discards collectively.
In order to prevent other threads from allocating or freeing chunks, we
hold the chunks lock across the search and discard calls.  We release it
between searches to allow the file system to perform more-or-less
normally.  Since the running transaction can commit and disappear while
we're using the transaction pointer, we take a reference to it and
release it after the search.  This is safe since it would happen normally
at the end of the transaction commit after any locks are released anyway.
We also take the commit_root_sem to protect against a transaction starting
and committing while we're running.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Tested-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
2015-07-29 08:15:26 -07:00
Jeff Mahoney
86557861df btrfs: skip superblocks during discard
Btrfs doesn't track superblocks with extent records so there is nothing
persistent on-disk to indicate that those blocks are in use.  We track
the superblocks in memory to ensure they don't get used by removing them
from the free space cache when we load a block group from disk.  Prior
to 47ab2a6c6a (Btrfs: remove empty block groups automatically), that
was fine since the block group would never be reclaimed so the superblock
was always safe.  Once we started removing the empty block groups, we
were protected by the fact that discards weren't being properly issued
for unused space either via FITRIM or -odiscard.  The block groups were
still being released, but the blocks remained on disk.

In order to properly discard unused block groups, we need to filter out
the superblocks from the discard range.  Superblocks are located at fixed
locations on each device, so it makes sense to filter them out in
btrfs_issue_discard, which is used by both -odiscard and FITRIM.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Tested-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
2015-07-29 08:15:25 -07:00
Jeff Mahoney
4d89d377bb btrfs: btrfs_issue_discard ensure offset/length are aligned to sector boundaries
It's possible, though unexpected, to pass unaligned offsets and lengths
to btrfs_issue_discard.  We then shift the offset/length values to sector
units.  If an unaligned offset has been passed, it will result in the
entire sector being discarded, possibly losing data.  An unaligned
length is safe but we'll end up returning an inaccurate number of
discarded bytes.

This patch aligns the offset to the 512B boundary, adjusts the length,
and warns, since we shouldn't be discarding on an offset that isn't
aligned with our sector size.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Tested-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
2015-07-29 08:15:24 -07:00
Jeff Mahoney
d04c6b8832 btrfs: make btrfs_issue_discard return bytes discarded
Initially this will just be the length argument passed to it,
but the following patches will adjust that to reflect re-alignment
and skipped blocks.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Tested-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
2015-07-29 08:15:22 -07:00
Phil Edworthy
b5a2875605 usb: renesas_usbhs: Allow an OTG PHY driver to provide VBUS
These changes allow a PHY driver to trigger a VBUS interrupt and
to provide the value of VBUS.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2015-07-29 09:59:22 -05:00
Li Jun
9e832bf7c0 usb: gadget: zero: allocate and init otg descriptor by otg capabilities
Allocate and initialize usb otg descriptor according to gadget otg
capabilities, add it for each usb configurations. If otg capability
is not defined, keep its original otg descriptor unchanged.

Reviewed-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Li Jun <jun.li@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2015-07-29 09:59:22 -05:00
Li Jun
3dcc705308 usb: gadget: serial: allocate and init otg descriptor by otg capabilities
Allocate and initialize usb otg descriptor according to gadget otg
capabilities, add it for each usb configurations. If otg capability
is not defined, keep its original otg descriptor unchanged.

Reviewed-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Li Jun <jun.li@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2015-07-29 09:59:22 -05:00
Li Jun
93d39afdb8 usb: gadget: printer: allocate and init otg descriptor by otg capabilities
Allocate and initialize usb otg descriptor according to gadget otg
capabilities, add it for each usb configurations. If otg capability
is not defined, keep its original otg descriptor unchanged.

Reviewed-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Li Jun <jun.li@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2015-07-29 09:59:22 -05:00
Li Jun
1156e91dd7 usb: gadget: ncm: allocate and init otg descriptor by otg capabilities
Allocate and initialize usb otg descriptor according to gadget otg
capabilities, add it for each usb configurations. If otg capability
is not defined, keep its original otg descriptor unchanged.

Signed-off-by: Li Jun <jun.li@freescale.com>
Reviewed-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2015-07-29 09:59:22 -05:00
Li Jun
21ddc2a860 usb: gadget: multi: allocate and init otg descriptor by otg capabilities
Allocate and initialize usb otg descriptor according to gadget otg
capabilities, add it for each usb configurations. If otg capability
is not defined, keep its original otg descriptor unchanged.

Signed-off-by: Li Jun <jun.li@freescale.com>
Reviewed-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2015-07-29 09:59:22 -05:00
Li Jun
d867889797 usb: gadget: mass_storage: allocate and init otg descriptor by otg capabilities
Allocate and initialize usb otg descriptor according to gadget otg
capabilities, add it for each usb configurations. If otg capability
is not defined, keep its original otg descriptor unchanged.

Signed-off-by: Li Jun <jun.li@freescale.com>
Reviewed-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2015-07-29 09:59:21 -05:00
Li Jun
d9e1867917 usb: gadget: hid: allocate and init otg descriptor by otg capabilities
Allocate and initialize usb otg descriptor according to gadget otg
capabilities, add it for each usb configurations. If otg capability
is not defined, keep its original otg descriptor unchanged.

Signed-off-by: Li Jun <jun.li@freescale.com>
Reviewed-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
2015-07-29 09:59:21 -05:00