This is the log recovery support. The process is quite straightforward.
We scan the log and read all valid meta/data/parity into memory. If a
stripe's data/parity checksum is correct, the stripe will be recoveried.
Otherwise, it's discarded and we don't scan the log further. The reclaim
process guarantees stripe which starts to be flushed raid disks has
completed data/parity and has correct checksum. To recovery a stripe, we
just copy its data/parity to corresponding raid disks.
The trick thing is superblock update after recovery. we can't let
superblock point to last valid meta block. The log might look like:
| meta 1| meta 2| meta 3|
meta 1 is valid, meta 2 is invalid. meta 3 could be valid. If superblock
points to meta 1, we write a new valid meta 2n. If crash happens again,
new recovery will start from meta 1. Since meta 2n is valid, recovery
will think meta 3 is valid, which is wrong. The solution is we create a
new meta in meta2 with its seq == meta 1's seq + 10 and let superblock
points to meta2. recovery will not think meta 3 is a valid meta,
because its seq is wrong
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: NeilBrown <neilb@suse.com>
This is the reclaim support for raid5 log. A stripe write will have
following steps:
1. reconstruct the stripe, read data/calculate parity. ops_run_io
prepares to write data/parity to raid disks
2. hijack ops_run_io. stripe data/parity is appending to log disk
3. flush log disk cache
4. ops_run_io run again and do normal operation. stripe data/parity is
written in raid array disks. raid core can return io to upper layer.
5. flush cache of all raid array disks
6. update super block
7. log disk space used by the stripe can be reused
In practice, several stripes consist of an io_unit and we will batch
several io_unit in different steps, but the whole process doesn't
change.
It's possible io return just after data/parity hit log disk, but then
read IO will need read from log disk. For simplicity, IO return happens
at step 4, where read IO can directly read from raid disks.
Currently reclaim run if there is specific reclaimable space (1/4 disk
size or 10G) or we are out of space. Reclaim is just to free log disk
spaces, it doesn't impact data consistency. The size based force reclaim
is to make sure log isn't too big, so recovery doesn't scan log too
much.
Recovery make sure raid disks and log disk have the same data of a
stripe. If crash happens before 4, recovery might/might not recovery
stripe's data/parity depending on if data/parity and its checksum
matches. In either case, this doesn't change the syntax of an IO write.
After step 3, stripe is guaranteed recoverable, because stripe's
data/parity is persistent in log disk. In some cases, log disk content
and raid disks content of a stripe are the same, but recovery will still
copy log disk content to raid disks, this doesn't impact data
consistency. space reuse happens after superblock update and cache
flush.
There is one situation we want to avoid. A broken meta in the middle of
a log causes recovery can't find meta at the head of log. If operations
require meta at the head persistent in log, we must make sure meta
before it persistent in log too. The case is stripe data/parity is in
log and we start write stripe to raid disks (before step 4). stripe
data/parity must be persistent in log before we do the write to raid
disks. The solution is we restrictly maintain io_unit list order. In
this case, we only write stripes of an io_unit to raid disks till the
io_unit is the first one whose data/parity is in log.
The io_unit list order is important for other cases too. For example,
some io_unit are reclaimable and others not. They can be mixed in the
list, we shouldn't reuse space of an unreclaimable io_unit.
Includes fixes to problems which were...
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: NeilBrown <neilb@suse.com>
This introduces a simple log for raid5. Data/parity writing to raid
array first writes to the log, then write to raid array disks. If
crash happens, we can recovery data from the log. This can speed up
raid resync and fix write hole issue.
The log structure is pretty simple. Data/meta data is stored in block
unit, which is 4k generally. It has only one type of meta data block.
The meta data block can track 3 types of data, stripe data, stripe
parity and flush block. MD superblock will point to the last valid
meta data block. Each meta data block has checksum/seq number, so
recovery can scan the log correctly. We store a checksum of stripe
data/parity to the metadata block, so meta data and stripe data/parity
can be written to log disk together. otherwise, meta data write must
wait till stripe data/parity is finished.
For stripe data, meta data block will record stripe data sector and
size. Currently the size is always 4k. This meta data record can be made
simpler if we just fix write hole (eg, we can record data of a stripe's
different disks together), but this format can be extended to support
caching in the future, which must record data address/size.
For stripe parity, meta data block will record stripe sector. It's
size should be 4k (for raid5) or 8k (for raid6). We always store p
parity first. This format should work for caching too.
flush block indicates a stripe is in raid array disks. Fixing write
hole doesn't need this type of meta data, it's for caching extension.
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: NeilBrown <neilb@suse.com>
When a stripe finishes construction, we write the stripe to raid in
ops_run_io normally. With log, we do a bunch of other operations before
the stripe is written to raid. Mainly write the stripe to log disk,
flush disk cache and so on. The operations are still driven by raid5d
and run in the stripe state machine. We introduce a new state for such
stripe (trapped into log). The stripe is in this state from the time it
first enters ops_run_io (finish construction) to the time it is written
to raid. Since we know the state is only for log, we bypass other
check/operation in handle_stripe.
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: NeilBrown <neilb@suse.com>
Next several patches use some raid5 functions, rename them with raid5
prefix and export out.
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: NeilBrown <neilb@suse.com>
Journal device stores data in a log structure. We need record the log
start. Here we override md superblock recovery_offset for this purpose.
This field of a journal device is meaningless otherwise.
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: NeilBrown <neilb@suse.com>
Next patches will use a disk as raid5/6 journaling. We need a new disk
role to present the journal device and add MD_FEATURE_JOURNAL to
feature_map for backward compability.
Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: NeilBrown <neilb@suse.com>
Add the following two macros for special roles: spare and faulty
MD_DISK_ROLE_SPARE 0xffff
MD_DISK_ROLE_FAULTY 0xfffe
Add MD_DISK_ROLE_MAX 0xff00 as the maximal possible regular role,
and minimal value of special role.
Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: NeilBrown <neilb@suse.com>
To incorporate --grow feature executed on one node, other nodes need to
acknowledge the change in number of disks. Call update_raid_disks()
to update internal data structures.
This leads to call check_reshape() -> md_allow_write() -> md_update_sb(),
this results in a deadlock. This is done so it can safely allocate memory
(which might trigger writeback which might write to raid1). This is
not required for md with a bitmap.
In the clustered case, we don't perform md_update_sb() in md_allow_write(),
but in do_md_run(). Also we disable safemode for clustered mode.
mddev->recovery_cp need not be set in check_sb_changes() because this
is required only when a node reads another node's bitmap. mddev->recovery_cp
(which is read from sb->resync_offset), is set only if mddev is in_sync.
Since we disabled safemode, in_sync is set to zero.
In a clustered environment, the MD may not be in sync because another
node could be writing to it. So make sure that in_sync is not set in
case of clustered node in __md_stop_writes().
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Signed-off-by: NeilBrown <neilb@suse.com>
This patches fixes sparse warnings like incorrect type in assignment
(different base types), cast to restricted __le64.
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Guoqing Jiang <gqjiang@suse.com>
Signed-off-by: NeilBrown <neilb@suse.com>
In Linux 3.9 we introduce a new 'far' layout for RAID10 which was
supposed to rotate the replicas differently and so provide better
resilience. In particular it could survive more combinations of 2
drive failures.
Unfortunately. due to a coding error, this some did what was wanted,
sometimes improved less than we hoped, and sometimes - in very
unlikely circumstances - put multiple replicas on the same device so
the redundancy was harmed.
No public user-space tool has created arrays using this layout so it
is very unlikely that zero-redundancy arrays actually exist. Probably
no arrays using any form of the new layout exist. But we cannot be
certain.
So use another bit in the 'layout' number and introduce a bug-fixed
version of the layout.
Also when assembling an array, if it has a zero-redundancy layout,
give a warning.
Reported-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: NeilBrown <neilb@suse.com>
When a write fails and a bad-block-list is present, we can
update the bad-block-list instead of writing the data. If
this succeeds then it is OK clear the relevant bitmap-bit as
no further 'sync' of the block is needed.
However if writing the bad-block-list fails then we need to
treat the write as failed and particularly must not clear
the bitmap bit. Otherwise the device can be re-added (after
any hardware connection issues are resolved) and because the
relevant bit in the bitmap is clear, that block will not be
resynced. This leads to data corruption.
We already delay the final bio_endio() on the write until
the bad-block-list is written so that when the write
returns: either that data is safe, the bad-block record is
safe, or the fact that the device is faulty is safe.
However we *don't* delay the clearing of the bitmap, so the
bitmap bit can be recorded as cleared before we know if the
bad-block-list was written safely.
So: delay that until the write really is safe.
i.e. move the call to close_write() until just before
calling bio_endio(), and recheck the 'is array degraded'
status before making that call.
This bug goes back to v3.1 when bad-block-lists were
introduced, though it only affects arrays created with
mdadm-3.3 or later as only those have bad-block lists.
Backports will require at least
Commit: 95af587e95 ("md/raid10: ensure device failure recorded before write request returns.")
as well. I'll send that to 'stable' separately.
Note that of the two tests of R10BIO_WriteError that this
patch adds, the first is certain to fail and the second is
certain to succeed. However doing it this way makes the
patch more obviously correct. I will tidy the code up in a
future merge window.
Reported-by: Nate Dailey <nate.dailey@stratus.com>
Fixes: bd870a16c5 ("md/raid10: Handle write errors by updating badblock log.")
Signed-off-by: NeilBrown <neilb@suse.com>
When a write fails and a bad-block-list is present, we can
update the bad-block-list instead of writing the data. If
this succeeds then it is OK clear the relevant bitmap-bit as
no further 'sync' of the block is needed.
However if writing the bad-block-list fails then we need to
treat the write as failed and particularly must not clear
the bitmap bit. Otherwise the device can be re-added (after
any hardware connection issues are resolved) and because the
relevant bit in the bitmap is clear, that block will not be
resynced. This leads to data corruption.
We already delay the final bio_endio() on the write until
the bad-block-list is written so that when the write
returns: either that data is safe, the bad-block record is
safe, or the fact that the device is faulty is safe.
However we *don't* delay the clearing of the bitmap, so the
bitmap bit can be recorded as cleared before we know if the
bad-block-list was written safely.
So: delay that until the write really is safe.
i.e. move the call to close_write() until just before
calling bio_endio(), and recheck the 'is array degraded'
status before making that call.
This bug goes back to v3.1 when bad-block-lists were
introduced, though it only affects arrays created with
mdadm-3.3 or later as only those have bad-block lists.
Backports will require at least
Commit: 55ce74d4bf ("md/raid1: ensure device failure recorded before write request returns.")
as well. I'll send that to 'stable' separately.
Note that of the two tests of R1BIO_WriteError that this
patch adds, the first is certain to fail and the second is
certain to succeed. However doing it this way makes the
patch more obviously correct. I will tidy the code up in a
future merge window.
Reported-and-tested-by: Nate Dailey <nate.dailey@stratus.com>
Cc: Jes Sorensen <Jes.Sorensen@redhat.com>
Fixes: cd5ff9a16f ("md/raid1: Handle write errors by updating badblock log.")
Signed-off-by: NeilBrown <neilb@suse.com>
Remove some superfluous data from the OMAP2+ hwmod data files. Mostly
this is a result of data being moved to DT files. Nothing too
controversial, here.
Basic build, boot, and PM test results are available here:
http://www.pwsan.com/omap/testlogs/hwmod-cleanup-a-for-v4.4/20151023130140/
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Merge tag 'for-v4.4/omap-hwmod-cleanup-a' of git://git.kernel.org/pub/scm/linux/kernel/git/pjw/omap-pending into omap-for-v4.4/soc
ARM: OMAP2+: hwmod cleanup for v4.4
Remove some superfluous data from the OMAP2+ hwmod data files. Mostly
this is a result of data being moved to DT files. Nothing too
controversial, here.
Basic build, boot, and PM test results are available here:
http://www.pwsan.com/omap/testlogs/hwmod-cleanup-a-for-v4.4/20151023130140/
Some tools have a lot of options, so, providing a way to show help just
for some of them may come handy:
$ perf report -h --tui
Usage: perf report [<options>]
--tui Use the TUI interface
$ perf report -h --tui --showcpuutilization -b -c
Usage: perf report [<options>]
-b, --branch-stack use branch records for per branch histogram filling
-c, --comms <comm[,comm...]>
only consider symbols in these comms
--showcpuutilization
Show sample percentage for different cpu modes
--tui Use the TUI interface
$
Using it with perf bash completion is also handy, just make sure you
source the needed file:
$ . ~/git/linux/tools/perf/perf-completion.sh
Then press tab/tab after -- to see a list of options, put them after -h
and only the options chosen will have its help presented:
$ perf report -h --
--asm-raw --demangle-kernel --group
--kallsyms --pretty --stdio
--branch-history --disassembler-style --gtk
--max-stack --showcpuutilization --symbol-filter
--branch-stack --dsos --header
--mem-mode --show-info --symbols
--call-graph --dump-raw-trace --header-only
--modules --show-nr-samples --symfs
--children --exclude-other --hide-unresolved
--objdump --show-ref-call-graph --threads
--column-widths --fields --ignore-callees
--parent --show-total-period --tid
--comms --field-separator --input
--percentage --socket-filter --tui
--cpu --force --inverted
--percent-limit --sort --verbose
--demangle --full-source-path --itrace
--pid --source --vmlinux
$ perf report -h --socket-filter
Usage: perf report [<options>]
--socket-filter <n>
only show processor socket that match with this filter
Suggested-by: Ingo Molnar <mingo@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Chandler Carruth <chandlerc@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-83mcdd3wj0379jcgea8w0fxa@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
When asking for a listing of the options, be it using -h or when an
unknown option is passed, order it by one-letter options, then the ones
having just long names.
Suggested-by: Ingo Molnar <mingo@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Chandler Carruth <chandlerc@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-41qh68t35n4ehrpsuazp1dx8@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
struct bnxt_pf_info needs to be always defined. Move bnxt_update_vf_mac()
to bnxt_sriov.c and add some missing #ifdef CONFIG_BNXT_SRIOV.
Reported-by: Jim Hull <jim.hull@hpe.com>
Tested-by: Jim Hull <jim.hull@hpe.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Upon registering a FPGA Manager low level driver, FPGA Manager
core overwrites the platform drvdata pointer. Prior to this commit
zynq-fpga falsely relied on this pointer to still be valid at remove()
time.
Reported-by: Alan Tull <atull@opensource.altera.com>
Signed-off-by: Moritz Fischer <moritz.fischer@ettus.com>
Acked-by: Alan Tull <atull@opensource.altera.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Remove unnecessary null pointer checks. We want the caller of
these functions to do their own pointer checks. Add some
comments to document this.
Signed-off-by: Alan Tull <atull@opensource.altera.com>
Reviewed-by: Moritz Fischer <moritz.fischer@ettus.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ensure device and driver lifetime from of_fpga_mgr_get() to
fpga_mgr_put().
* Don't put_device() in of_fpga_mgr_get, do it in fpga_mgr_put().
(still do put_device if there is an error).
* Do module_get on the low level driver.
* Don't need to module_get(THIS_MODULE) since we won't be allowed
to unload the fpga manager core without unloading low level
driver first.
* Remove unnedessary null check for node pointer.
Signed-off-by: Alan Tull <atull@opensource.altera.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This gets rid of the code to strip away the header and byteswap,
as well as the check for the sync word.
Signed-off-by: Moritz Fischer <moritz.fischer@ettus.com>
Reviewed-by: Josh Cartwright <joshc@ni.com>
Acked-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit fixes the unbalanced clock handling, where
a failed probe would leave the clock with an enable count of -1.
Reported-by: Josh Cartwright <joshc@ni.com>
Signed-off-by: Moritz Fischer <moritz.fischer@ettus.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Here are 3 xhci driver fixes for reported issues for 4.3-rc7
All have been in linux-next for a while with no problems.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'usb-4.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb
Pull USB fixes from Greg KH:
"Here are three xhci driver fixes for reported issues for 4.3-rc7
All have been in linux-next for a while with no problems"
* tag 'usb-4.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
xhci: Add spurious wakeup quirk for LynxPoint-LP controllers
xhci: handle no ping response error properly
xhci: don't finish a TD if we get a short transfer event mid TD
Here are two fixes that resolve reported issues, one with the 8250
driver, and the other with the generic fbcon driver.
Both have been in linux-next for a while.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'tty-4.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty
Pull tty/serial fixes from Greg KH:
"Here are two fixes that resolve reported issues, one with the 8250
driver, and the other with the generic fbcon driver.
Both have been in linux-next for a while"
* tag 'tty-4.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
fbcon: initialize blink interval before calling fb_set_par
Revert "serial: 8250_dma: don't bother DMA with small transfers"
Here are 4 iio driver fixes for 4.3-rc7, fixing some reported issues.
All of these have been in linux-next for a while.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'staging-4.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging
Pull staging driver fixes from Greg KH:
"Here are four iio driver fixes for 4.3-rc7, fixing some reported
issues. All of these have been in linux-next for a while"
* tag 'staging-4.3-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
iio: mxs-lradc: Fix temperature offset
iio: accel: sca3000: memory corruption in sca3000_read_first_n_hw_rb()
iio: st_accel: fix interrupt handling on LIS3LV02
iio: adc: twl4030: Fix ADC[3:6] readings
6 serious fixes:
1) Hold the mutex around the find and corresponding update of our gid
2) The ifa list is rcu protected, copy its contents under rcu to avoid
using a freed structure
3) On error, netdev might be null, so check it before trying to release it
4) On init, if workqueue alloc fails, fail init
5) The new demux patches exposed a bug in mlx5 and ipath drivers, we need
to use the payload P_Key to determine the P_Key the packet arrived on
because the hardware doesn't tell us the truth
6) Due to a couple convoluted error flows, it is possible for the CM to
trigger a use_after_free and a double_free of rb nodes. Add two
checks to prevent that. This code has worked for 10+ years. It is
likely that some of the recent changes have caused this issue to
surface. The current patch will protect us from nasty events for
now while we track down why this is just now showing up.
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma
Pull infiniband fixes from Doug Ledford:
"It's late in the game, I know, but these fixes seemed important enough
to warrant a late pull request. They all involve oopses or use after
frees or corruptions.
Six serious fixes:
- Hold the mutex around the find and corresponding update of our gid
- The ifa list is rcu protected, copy its contents under rcu to avoid
using a freed structure
- On error, netdev might be null, so check it before trying to
release it
- On init, if workqueue alloc fails, fail init
- The new demux patches exposed a bug in mlx5 and ipath drivers, we
need to use the payload P_Key to determine the P_Key the packet
arrived on because the hardware doesn't tell us the truth
- Due to a couple convoluted error flows, it is possible for the CM
to trigger a use_after_free and a double_free of rb nodes. Add two
checks to prevent that. This code has worked for 10+ years. It is
likely that some of the recent changes have caused this issue to
surface. The current patch will protect us from nasty events for
now while we track down why this is just now showing up"
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dledford/rdma:
IB/cm: Fix rb-tree duplicate free and use-after-free
IB/cma: Use inner P_Key to determine netdev
IB/ucma: check workqueue allocation before usage
IB/cma: Potential NULL dereference in cma_id_from_event
IB/core: Fix use after free of ifa
IB/core: Fix memory corruption in ib_cache_gid_set_default_gid
properly store flags in DM cache metadata's superblock).
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Merge tag 'dm-4.3-fixes-4' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
Pull device mapper fixes from Mike Snitzer:
"Three stable fixes (two in btree code used by DM thinp and one to
properly store flags in DM cache metadata's superblock)"
* tag 'dm-4.3-fixes-4' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
dm cache: the CLEAN_SHUTDOWN flag was not being set
dm btree: fix leak of bufio-backed block in btree_split_beneath error path
dm btree remove: fix a bug when rebalancing nodes after removal
Pull block layer fixes from Jens Axboe:
"A final set of fixes for 4.3.
It is (again) bigger than I would have liked, but it's all been
through the testing mill and has been carefully reviewed by multiple
parties. Each fix is either a regression fix for this cycle, or is
marked stable. You can scold me at KS. The pull request contains:
- Three simple fixes for NVMe, fixing regressions since 4.3. From
Arnd, Christoph, and Keith.
- A single xen-blkfront fix from Cathy, fixing a NULL dereference if
an error is returned through the staste change callback.
- Fixup for some bad/sloppy code in nbd that got introduced earlier
in this cycle. From Markus Pargmann.
- A blk-mq tagset use-after-free fix from Junichi.
- A backing device lifetime fix from Tejun, fixing a crash.
- And finally, a set of regression/stable fixes for cgroup writeback
from Tejun"
* 'for-linus' of git://git.kernel.dk/linux-block:
writeback: remove broken rbtree_postorder_for_each_entry_safe() usage in cgwb_bdi_destroy()
NVMe: Fix memory leak on retried commands
block: don't release bdi while request_queue has live references
nvme: use an integer value to Linux errno values
blk-mq: fix use-after-free in blk_mq_free_tag_set()
nvme: fix 32-bit build warning
writeback: fix incorrect calculation of available memory for memcg domains
writeback: memcg dirty_throttle_control should be initialized with wb->memcg_completions
writeback: bdi_writeback iteration must not skip dying ones
writeback: fix bdi_writeback iteration in wakeup_dirtytime_writeback()
writeback: laptop_mode_timer_fn() needs rcu_read_lock() around bdi_writeback iteration
nbd: Add locking for tasks
xen-blkfront: check for null drvdata in blkback_changed (XenbusStateClosing)
Pull Ceph fixes from Sage Weil:
"Two fixes.
One is a stopgap to prevent a stack blowout when users have a deep
chain of image clones. (We'll rewrite this code to be non-recursive
for the next window, but in the meantime this is a simple fix that
avoids a crash.)
The second fixes a refcount underflow"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
rbd: prevent kernel stack blow up on rbd map
rbd: don't leak parent_spec in rbd_dev_probe_parent()
Pull btrfs fixes from Chris Mason:
"I have two more small fixes this week:
Qu's fix avoids unneeded COW during fallocate, and Christian found a
memory leak in the error handling of an earlier fix"
* 'for-linus-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
btrfs: fix possible leak in btrfs_ioctl_balance()
btrfs: Avoid truncate tailing page if fallocate range doesn't exceed inode size
Use devm_* APIs to simplify the code.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Tested-by: Manuel Lauss <manuel.lauss@gmail.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
DW i2s controller's master/slave config can be read from a
read-only register. Machine driver can try to set a master/slave
format on cpu-dai using 'set_fmt' of dai ops. A check is added to
verify codec is master when dwc is slave and vice-versa.
Signed-off-by: Maruthi Bayyavarapu <maruthi.bayyavarapu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The first part of the comment is wrong since November 2007, delete it.
The second part of the comment is related to I2C_PEC, not I2C_SLAVE, so
move it where it belongs.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Cc: Wolfram Sang <wsa@the-dreams.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
The ioctl is named I2C_RDWR for "I2C read/write". But references to it
were misspelled "rdrw". Fix them.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
In prima2 and atlas7, due to some hardware design issue. we
need to adjust the divider ratio a little according to i2c
bus frequency ranges.
Since i2c is open drain interface that allows the slave to
stall the transaction by holding the SCL line at '0', the RTL
implementation is waiting for SCL feedback from the pin after
setting it to High-Z ('1'). This wait adds to the high-time
interval counter few cycles of the input synchronization
(depending on the SCL_FILTER_REG field), and also the time it
takes for the board pull-up resistor to rise the SCL line.
For slow SCL settings these additions are negligible, but they
start to affect the speed when clock is set to faster frequencies.
This patch is based on the actual tests, and it makes SCL more
accurate.
Signed-off-by: Guoying Zhang <Guoying.Zhang@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
This patch adds the LS2080a DTS files for QDS and RDB boards
which support the LS2080a SoC.
Signed-off-by: Bhupesh Sharma <bhupesh.sharma@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This patch updates the LS2080a simulator DTS to add support of various
peripherals which are supported on the simulator platform and explicitly
disables those which are yet not supported on the platform.
Signed-off-by: Bhupesh Sharma <bhupesh.sharma@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Checkpatch complains about the text suggesting writing to
Free Software Foundation for GPLv2 license copy.
This patch removes the same from the .dtsi and .dts
Signed-off-by: Bhupesh Sharma <bhupesh.sharma@freescale.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
A static code checker found a memory leak in the Versatile
ICST code. Fix it.
Fixes: a183da637c "clk: versatile: respect parent rate in ICST clock"
Reported-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
These APIs aren't used, so remove them. This can be reverted if
we get a user at some point.
Reviewed-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Suggested-by: Michael Turquette <mturquette@baylibre.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
This patch updates the LS2080a DTSI (DTS Include) file to add
support for the following peripherals:
- USB 3.0 Host
- PMU
- CCN-504
- SATA
- SPI
- PCIe
Signed-off-by: Bhupesh Sharma <bhupesh.sharma@freescale.com>
Signed-off-by: Jaiprakash Singh <b44839@freescale.com>
Signed-off-by: Alison Wang <alison.wang@freescale.com>
Signed-off-by: Liu Gang <Gang.Liu@freescale.com>
Signed-off-by: Minghuan Lian <Minghuan.Lian@freescale.com>
Signed-off-by: Shaohui Xie <Shaohui.Xie@freescale.com>
Signed-off-by: Yangbo Lu <yangbo.lu@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Since the Synopsys DWC3 controller driver inherits the generic bindings
defined in 'usb/generic.txt', this patch tries to capture the same in
the DWC3 binging documentation to avoid any confusion in usage of properties
like 'dr_mode' for certain SoCs like FSL LS2080A.
Signed-off-by: Bhupesh Sharma <bhupesh.sharma@freescale.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Update the FSL, GPIO binding documentation to add support
for GPIO controller found on Freescale's LS2080A platform.
Signed-off-by: Liu Gang <Gang.Liu@freescale.com>
Signed-off-by: Bhupesh Sharma <bhupesh.sharma@freescale.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
The driver can not be used on a platform with common clock framework
until clk_prepare/clk_unprepare calls are added, otherwise clk_enable
calls will fail and a WARN is generated.
Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
According to Documentation/i2c/fault-codes the response to a bus NACK
should be -ENXIO, so fix the error code.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Since the same board components can be used across ARM and PPC board families,
this patch moves the FSL board-specific bindings out of bindings/powerpci.
While at it, this patch also adds the bindings for QIXIS FPGA controller
found on FSL LS2080A boards. These boards have an on-board FPGA/CPLD
connected to the IFC controller.
Signed-off-by: Bhupesh Sharma <bhupesh.sharma@freescale.com>
Signed-off-by: Jaiprakash Singh <b44839@freescale.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
