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This patch adds the infrastructure required to register non-linear gpio
ranges through gpiolib and the standard GPIO device tree bindings.
Signed-off-by: Christian Ruppert <christian.ruppert@abilis.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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The AS3722 is a compact system PMU suitable for mobile phones, tablets etc.
Add a driver to support accessing the GPIO, pinmux and pin configuration
of 8 GPIO pins found on the ams AS3722 through pin control driver and
gpiolib.
The driver will register itself as the pincontrol driver and gpio driver.
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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While commit e164153 (pinctrl: imx: move hard-coding data into device
tree) moves to use DTC macro for imx pinctrl device tree setting, it
changes the semantics of fsl,pins without updating the bindings doc
properly. Let's update the fsl,pins description to stop confusing
people.
While at it, the example in the document is updated, and the stale TODO
gets removed.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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GPIO output value should be set after the GPIO interrupt is disabled.
Use BIT macro as well.
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
[Edited commit message]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Also avoid use NULL pointer in error message.
v2-changes:
- use port pinter only after checking
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Palmas devices do not support the default bias configuration
and hence removing this option from valid pin config parameters.
Acked-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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dn and dp of USB1 can share with UART1(UART1 can route rx,tx to dn and dp pins of USB1).
here we add this pinmux capability.
USB1/UART1 mode selection has dedicated control register in RSC module, here we attach
the register offset of private data of related pin groups.
Signed-off-by: Rong Wang <Rong.Wang@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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USP(Universal Serial Ports) can be UART as commit 5df831117b85a08e7aa,
this patch defines the USP-based UART function pin groups for prima2.
Signed-off-by: Qipan Li <Qipan.Li@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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the old codes defined uart0_nostreamctrl_pins, but missed pingroup
and padmux definition for it. this patch fixes it.
Signed-off-by: Qipan Li <Qipan.Li@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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The data structure of_match_ptr() protects is always compiled in.
Hence of_match_ptr() is not needed.
This is a squash commit of:
pinctrl: at91: Remove redundant of_match_ptr
pinctrl: exynos5440: Remove redundant of_match_ptr
pinctrl: imx35: Remove redundant of_match_ptr
pinctrl: imx51: Remove redundant of_match_ptr
pinctrl: imx53: Remove redundant of_match_ptr
pinctrl: imx6dl: Remove redundant of_match_ptr
pinctrl: imx6q: Remove redundant of_match_ptr
pinctrl: samsung: Remove redundant of_match_ptr
pinctrl: vf610: Remove redundant of_match_ptr
pinctrl: imx6sl: Remove redundant of_match_ptr
pinctrl: plgpio: Remove redundant of_match_ptr
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Modify the code to use current_euid(), and in_egroup_p, as in done
in fs/proc/proc_sysctl.c:test_perm()
Cc: stable@vger.kernel.org
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Reported-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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When btrfs creates a bioset, we must also allocate the integrity data pool.
Otherwise btrfs will crash when it tries to submit a bio to a checksumming
disk:
BUG: unable to handle kernel NULL pointer dereference at 0000000000000018
IP: [<ffffffff8111e28a>] mempool_alloc+0x4a/0x150
PGD 2305e4067 PUD 23063d067 PMD 0
Oops: 0000 [#1] PREEMPT SMP
Modules linked in: btrfs scsi_debug xfs ext4 jbd2 ext3 jbd mbcache
sch_fq_codel eeprom lpc_ich mfd_core nfsd exportfs auth_rpcgss af_packet
raid6_pq xor zlib_deflate libcrc32c [last unloaded: scsi_debug]
CPU: 1 PID: 4486 Comm: mount Not tainted 3.12.0-rc1-mcsum #2
Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
task: ffff8802451c9720 ti: ffff880230698000 task.ti: ffff880230698000
RIP: 0010:[<ffffffff8111e28a>] [<ffffffff8111e28a>] mempool_alloc+0x4a/0x150
RSP: 0018:ffff880230699688 EFLAGS: 00010286
RAX: 0000000000000001 RBX: 0000000000000000 RCX: 00000000005f8445
RDX: 0000000000000001 RSI: 0000000000000010 RDI: 0000000000000000
RBP: ffff8802306996f8 R08: 0000000000011200 R09: 0000000000000008
R10: 0000000000000020 R11: ffff88009d6e8000 R12: 0000000000011210
R13: 0000000000000030 R14: ffff8802306996b8 R15: ffff8802451c9720
FS: 00007f25b8a16800(0000) GS:ffff88024fc80000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000000018 CR3: 0000000230576000 CR4: 00000000000007e0
Stack:
ffff8802451c9720 0000000000000002 ffffffff81a97100 0000000000281250
ffffffff81a96480 ffff88024fc99150 ffff880228d18200 0000000000000000
0000000000000000 0000000000000040 ffff880230e8c2e8 ffff8802459dc900
Call Trace:
[<ffffffff811b2208>] bio_integrity_alloc+0x48/0x1b0
[<ffffffff811b26fc>] bio_integrity_prep+0xac/0x360
[<ffffffff8111e298>] ? mempool_alloc+0x58/0x150
[<ffffffffa03e8041>] ? alloc_extent_state+0x31/0x110 [btrfs]
[<ffffffff81241579>] blk_queue_bio+0x1c9/0x460
[<ffffffff8123e58a>] generic_make_request+0xca/0x100
[<ffffffff8123e639>] submit_bio+0x79/0x160
[<ffffffffa03f865e>] btrfs_map_bio+0x48e/0x5b0 [btrfs]
[<ffffffffa03c821a>] btree_submit_bio_hook+0xda/0x110 [btrfs]
[<ffffffffa03e7eba>] submit_one_bio+0x6a/0xa0 [btrfs]
[<ffffffffa03ef450>] read_extent_buffer_pages+0x250/0x310 [btrfs]
[<ffffffff8125eef6>] ? __radix_tree_preload+0x66/0xf0
[<ffffffff8125f1c5>] ? radix_tree_insert+0x95/0x260
[<ffffffffa03c66f6>] btree_read_extent_buffer_pages.constprop.128+0xb6/0x120
[btrfs]
[<ffffffffa03c8c1a>] read_tree_block+0x3a/0x60 [btrfs]
[<ffffffffa03caefd>] open_ctree+0x139d/0x2030 [btrfs]
[<ffffffffa03a282a>] btrfs_mount+0x53a/0x7d0 [btrfs]
[<ffffffff8113ab0b>] ? pcpu_alloc+0x8eb/0x9f0
[<ffffffff81167305>] ? __kmalloc_track_caller+0x35/0x1e0
[<ffffffff81176ba0>] mount_fs+0x20/0xd0
[<ffffffff81191096>] vfs_kern_mount+0x76/0x120
[<ffffffff81193320>] do_mount+0x200/0xa40
[<ffffffff81135cdb>] ? strndup_user+0x5b/0x80
[<ffffffff81193bf0>] SyS_mount+0x90/0xe0
[<ffffffff8156d31d>] system_call_fastpath+0x1a/0x1f
Code: 4c 8d 75 a8 4c 89 6d e8 45 89 e0 4c 8d 6f 30 48 89 5d d8 41 83 e0 af 48
89 fb 49 83 c6 18 4c 89 7d f8 65 4c 8b 3c 25 c0 b8 00 00 <48> 8b 73 18 44 89 c7
44 89 45 98 ff 53 20 48 85 c0 48 89 c2 74
RIP [<ffffffff8111e28a>] mempool_alloc+0x4a/0x150
RSP <ffff880230699688>
CR2: 0000000000000018
---[ end trace 7a96042017ed21e2 ]---
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
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This reverts commit 07f9b61c3915e8eb156cb4461b3946736356ad02.
07f9b61c was intended to be a cleanup that didn't change anything, but in
fact, for systems without _CBA (which is almost everything), it broke
extended config space for domain 0 and all config space for other domains.
Reference: http://lkml.kernel.org/r/20131004011806.GE20450@dangermouse.emea.sgi.com
Reported-by: Hedi Berriche <hedi@sgi.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
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Now avc_audit() has no more users with that parameter. Remove it.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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.. so get rid of it. The only indirect users were all the
avc_has_perm() callers which just expanded to have a zero flags
argument.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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free_device rcu callback, scheduled from btrfs_rm_dev_replace_srcdev,
can be processed before btrfs_scratch_superblock is called, which would
result in a use-after-free on btrfs_device contents. Fix this by
zeroing the superblock before the rcu callback is registered.
Cc: Stefan Behrens <sbehrens@giantdisaster.de>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
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The current implementation of worker threads in Btrfs has races in
worker stopping code, which cause all kinds of panics and lockups when
running btrfs/011 xfstest in a loop. The problem is that
btrfs_stop_workers is unsynchronized with respect to check_idle_worker,
check_busy_worker and __btrfs_start_workers.
E.g., check_idle_worker race flow:
btrfs_stop_workers(): check_idle_worker(aworker):
- grabs the lock
- splices the idle list into the
working list
- removes the first worker from the
working list
- releases the lock to wait for
its kthread's completion
- grabs the lock
- if aworker is on the working list,
moves aworker from the working list
to the idle list
- releases the lock
- grabs the lock
- puts the worker
- removes the second worker from the
working list
......
btrfs_stop_workers returns, aworker is on the idle list
FS is umounted, memory is freed
......
aworker is waken up, fireworks ensue
With this applied, I wasn't able to trigger the problem in 48 hours,
whereas previously I could reliably reproduce at least one of these
races within an hour.
Reported-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
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The crash[1] is found by xfstests/generic/208 with "-o compress",
it's not reproduced everytime, but it does panic.
The bug is quite interesting, it's actually introduced by a recent commit
(573aecafca1cf7a974231b759197a1aebcf39c2a,
Btrfs: actually limit the size of delalloc range).
Btrfs implements delay allocation, so during writeback, we
(1) get a page A and lock it
(2) search the state tree for delalloc bytes and lock all pages within the range
(3) process the delalloc range, including find disk space and create
ordered extent and so on.
(4) submit the page A.
It runs well in normal cases, but if we're in a racy case, eg.
buffered compressed writes and aio-dio writes,
sometimes we may fail to lock all pages in the 'delalloc' range,
in which case, we need to fall back to search the state tree again with
a smaller range limit(max_bytes = PAGE_CACHE_SIZE - offset).
The mentioned commit has a side effect, that is, in the fallback case,
we can find delalloc bytes before the index of the page we already have locked,
so we're in the case of (delalloc_end <= *start) and return with (found > 0).
This ends with not locking delalloc pages but making ->writepage still
process them, and the crash happens.
This fixes it by just thinking that we find nothing and returning to caller
as the caller knows how to deal with it properly.
[1]:
------------[ cut here ]------------
kernel BUG at mm/page-writeback.c:2170!
[...]
CPU: 2 PID: 11755 Comm: btrfs-delalloc- Tainted: G O 3.11.0+ #8
[...]
RIP: 0010:[<ffffffff810f5093>] [<ffffffff810f5093>] clear_page_dirty_for_io+0x1e/0x83
[...]
[ 4934.248731] Stack:
[ 4934.248731] ffff8801477e5dc8 ffffea00049b9f00 ffff8801869f9ce8 ffffffffa02b841a
[ 4934.248731] 0000000000000000 0000000000000000 0000000000000fff 0000000000000620
[ 4934.248731] ffff88018db59c78 ffffea0005da8d40 ffffffffa02ff860 00000001810016c0
[ 4934.248731] Call Trace:
[ 4934.248731] [<ffffffffa02b841a>] extent_range_clear_dirty_for_io+0xcf/0xf5 [btrfs]
[ 4934.248731] [<ffffffffa02a8889>] compress_file_range+0x1dc/0x4cb [btrfs]
[ 4934.248731] [<ffffffff8104f7af>] ? detach_if_pending+0x22/0x4b
[ 4934.248731] [<ffffffffa02a8bad>] async_cow_start+0x35/0x53 [btrfs]
[ 4934.248731] [<ffffffffa02c694b>] worker_loop+0x14b/0x48c [btrfs]
[ 4934.248731] [<ffffffffa02c6800>] ? btrfs_queue_worker+0x25c/0x25c [btrfs]
[ 4934.248731] [<ffffffff810608f5>] kthread+0x8d/0x95
[ 4934.248731] [<ffffffff81060868>] ? kthread_freezable_should_stop+0x43/0x43
[ 4934.248731] [<ffffffff814fe09c>] ret_from_fork+0x7c/0xb0
[ 4934.248731] [<ffffffff81060868>] ? kthread_freezable_should_stop+0x43/0x43
[ 4934.248731] Code: ff 85 c0 0f 94 c0 0f b6 c0 59 5b 5d c3 0f 1f 44 00 00 55 48 89 e5 41 54 53 48 89 fb e8 2c de 00 00 49 89 c4 48 8b 03 a8 01 75 02 <0f> 0b 4d 85 e4 74 52 49 8b 84 24 80 00 00 00 f6 40 20 01 75 44
[ 4934.248731] RIP [<ffffffff810f5093>] clear_page_dirty_for_io+0x1e/0x83
[ 4934.248731] RSP <ffff8801869f9c48>
[ 4934.280307] ---[ end trace 36f06d3f8750236a ]---
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
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If we crash with a log, remount and recover that log, and then crash before we
can commit another transaction we will get transid verify errors on the next
mount. This is because we were not zero'ing out the log when we committed the
transaction after recovery. This is ok as long as we commit another transaction
at some point in the future, but if you abort or something else goes wrong you
can end up in this weird state because the recovery stuff says that the tree log
should have a generation+1 of the super generation, which won't be the case of
the transaction that was started for recovery. Fix this by removing the check
and _always_ zero out the log portion of the super when we commit a transaction.
This fixes the transid verify issues I was seeing with my force errors tests.
Thanks,
Signed-off-by: Josef Bacik <jbacik@fusionio.com>
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Every single user passes in '0'. I think we had non-zero users back in
some stone age when selinux_inode_permission() was implemented in terms
of inode_has_perm(), but that complicated case got split up into a
totally separate code-path so that we could optimize the much simpler
special cases.
See commit 2e33405785d3 ("SELinux: delay initialization of audit data in
selinux_inode_permission") for example.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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This fixes a build failure caused by calling the free() function which
does not exist in the Linux kernel.
Signed-off-by: Thierry Reding <treding@nvidia.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
(cherry picked from commit aaaae98022efa4f3c31042f1fdf9e7a0c5f04663)
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Free the memory in error path of xlog_recover_add_to_trans().
Normally this memory is freed in recovery pass2, but is leaked
in the error path.
Signed-off-by: Mark Tinguely <tinguely@sgi.com>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
(cherry picked from commit 519ccb81ac1c8e3e4eed294acf93be00b43dcad6)
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The determination of whether a directory entry contains a dtype
field originally was dependent on the filesystem having CRCs
enabled. This meant that the format for dtype beign enabled could be
determined by checking the directory block magic number rather than
doing a feature bit check. This was useful in that it meant that we
didn't need to pass a struct xfs_mount around to functions that
were already supplied with a directory block header.
Unfortunately, the introduction of dtype fields into the v4
structure via a feature bit meant this "use the directory block
magic number" method of discriminating the dirent entry sizes is
broken. Hence we need to convert the places that use magic number
checks to use feature bit checks so that they work correctly and not
by chance.
The current code works on v4 filesystems only because the dirent
size roundup covers the extra byte needed by the dtype field in the
places where this problem occurs.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
(cherry picked from commit 367993e7c6428cb7617ab7653d61dca54e2fdede)
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Michael Semon reported that xfs/299 generated this lockdep warning:
=============================================
[ INFO: possible recursive locking detected ]
3.12.0-rc2+ #2 Not tainted
---------------------------------------------
touch/21072 is trying to acquire lock:
(&xfs_dquot_other_class){+.+...}, at: [<c12902fb>] xfs_trans_dqlockedjoin+0x57/0x64
but task is already holding lock:
(&xfs_dquot_other_class){+.+...}, at: [<c12902fb>] xfs_trans_dqlockedjoin+0x57/0x64
other info that might help us debug this:
Possible unsafe locking scenario:
CPU0
----
lock(&xfs_dquot_other_class);
lock(&xfs_dquot_other_class);
*** DEADLOCK ***
May be due to missing lock nesting notation
7 locks held by touch/21072:
#0: (sb_writers#10){++++.+}, at: [<c11185b6>] mnt_want_write+0x1e/0x3e
#1: (&type->i_mutex_dir_key#4){+.+.+.}, at: [<c11078ee>] do_last+0x245/0xe40
#2: (sb_internal#2){++++.+}, at: [<c122c9e0>] xfs_trans_alloc+0x1f/0x35
#3: (&(&ip->i_lock)->mr_lock/1){+.+...}, at: [<c126cd1b>] xfs_ilock+0x100/0x1f1
#4: (&(&ip->i_lock)->mr_lock){++++-.}, at: [<c126cf52>] xfs_ilock_nowait+0x105/0x22f
#5: (&dqp->q_qlock){+.+...}, at: [<c12902fb>] xfs_trans_dqlockedjoin+0x57/0x64
#6: (&xfs_dquot_other_class){+.+...}, at: [<c12902fb>] xfs_trans_dqlockedjoin+0x57/0x64
The lockdep annotation for dquot lock nesting only understands
locking for user and "other" dquots, not user, group and quota
dquots. Fix the annotations to match the locking heirarchy we now
have.
Reported-by: Michael L. Semon <mlsemon35@gmail.com>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
(cherry picked from commit f112a049712a5c07de25d511c3c6587a2b1a015e)
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We need to free the ld_active list head before jumping into the callback
routine. Otherwise the callback could run into issue_pending and change
our ld_active list head we just going to free. This will run the channel
list into an currupted and undefined state.
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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The tasklet and irqhandler are using spin_lock while other routines are
using spin_lock_irqsave/restore. This leads to lockdep issues as
described bellow. This patch is changing the code to use
spinlock_irq_save/restore in both code pathes.
As imxdma_xfer_desc always gets called with spin_lock_irqsave lock held,
this patch also removes the spare call inside the routine to avoid
double locking.
[ 403.358162] =================================
[ 403.362549] [ INFO: inconsistent lock state ]
[ 403.366945] 3.10.0-20130823+ #904 Not tainted
[ 403.371331] ---------------------------------
[ 403.375721] inconsistent {IN-HARDIRQ-W} -> {HARDIRQ-ON-W} usage.
[ 403.381769] swapper/0 [HC0[0]:SC1[1]:HE1:SE0] takes:
[ 403.386762] (&(&imxdma->lock)->rlock){?.-...}, at: [<c019d77c>] imxdma_tasklet+0x20/0x134
[ 403.395201] {IN-HARDIRQ-W} state was registered at:
[ 403.400108] [<c004b264>] mark_lock+0x2a0/0x6b4
[ 403.404798] [<c004d7c8>] __lock_acquire+0x650/0x1a64
[ 403.410004] [<c004f15c>] lock_acquire+0x94/0xa8
[ 403.414773] [<c02f74e4>] _raw_spin_lock+0x54/0x8c
[ 403.419720] [<c019d094>] dma_irq_handler+0x78/0x254
[ 403.424845] [<c0061124>] handle_irq_event_percpu+0x38/0x1b4
[ 403.430670] [<c00612e4>] handle_irq_event+0x44/0x64
[ 403.435789] [<c0063a70>] handle_level_irq+0xd8/0xf0
[ 403.440903] [<c0060a20>] generic_handle_irq+0x28/0x38
[ 403.446194] [<c0009cc4>] handle_IRQ+0x68/0x8c
[ 403.450789] [<c0008714>] avic_handle_irq+0x3c/0x48
[ 403.455811] [<c0008f84>] __irq_svc+0x44/0x74
[ 403.460314] [<c0040b04>] cpu_startup_entry+0x88/0xf4
[ 403.465525] [<c02f00d0>] rest_init+0xb8/0xe0
[ 403.470045] [<c03e07dc>] start_kernel+0x28c/0x2d4
[ 403.474986] [<a0008040>] 0xa0008040
[ 403.478709] irq event stamp: 50854
[ 403.482140] hardirqs last enabled at (50854): [<c001c6b8>] tasklet_action+0x38/0xdc
[ 403.489954] hardirqs last disabled at (50853): [<c001c6a0>] tasklet_action+0x20/0xdc
[ 403.497761] softirqs last enabled at (50850): [<c001bc64>] _local_bh_enable+0x14/0x18
[ 403.505741] softirqs last disabled at (50851): [<c001c268>] irq_exit+0x88/0xdc
[ 403.513026]
[ 403.513026] other info that might help us debug this:
[ 403.519593] Possible unsafe locking scenario:
[ 403.519593]
[ 403.525548] CPU0
[ 403.528020] ----
[ 403.530491] lock(&(&imxdma->lock)->rlock);
[ 403.534828] <Interrupt>
[ 403.537474] lock(&(&imxdma->lock)->rlock);
[ 403.541983]
[ 403.541983] *** DEADLOCK ***
[ 403.541983]
[ 403.547951] no locks held by swapper/0.
[ 403.551813]
[ 403.551813] stack backtrace:
[ 403.556222] CPU: 0 PID: 0 Comm: swapper Not tainted 3.10.0-20130823+ #904
[ 403.563039] Backtrace:
[ 403.565581] [<c000b98c>] (dump_backtrace+0x0/0x10c) from [<c000bb28>] (show_stack+0x18/0x1c)
[ 403.574054] r6:00000000 r5:c05c51d8 r4:c040bd58 r3:00200000
[ 403.579872] [<c000bb10>] (show_stack+0x0/0x1c) from [<c02f398c>] (dump_stack+0x20/0x28)
[ 403.587955] [<c02f396c>] (dump_stack+0x0/0x28) from [<c02f29c8>] (print_usage_bug.part.28+0x224/0x28c)
[ 403.597340] [<c02f27a4>] (print_usage_bug.part.28+0x0/0x28c) from [<c004b404>] (mark_lock+0x440/0x6b4)
[ 403.606682] r8:c004a41c r7:00000000 r6:c040bd58 r5:c040c040 r4:00000002
[ 403.613566] [<c004afc4>] (mark_lock+0x0/0x6b4) from [<c004d844>] (__lock_acquire+0x6cc/0x1a64)
[ 403.622244] [<c004d178>] (__lock_acquire+0x0/0x1a64) from [<c004f15c>] (lock_acquire+0x94/0xa8)
[ 403.631010] [<c004f0c8>] (lock_acquire+0x0/0xa8) from [<c02f74e4>] (_raw_spin_lock+0x54/0x8c)
[ 403.639614] [<c02f7490>] (_raw_spin_lock+0x0/0x8c) from [<c019d77c>] (imxdma_tasklet+0x20/0x134)
[ 403.648434] r6:c3847010 r5:c040e890 r4:c38470d4
[ 403.653194] [<c019d75c>] (imxdma_tasklet+0x0/0x134) from [<c001c70c>] (tasklet_action+0x8c/0xdc)
[ 403.662013] r8:c0599160 r7:00000000 r6:00000000 r5:c040e890 r4:c3847114 r3:c019d75c
[ 403.670042] [<c001c680>] (tasklet_action+0x0/0xdc) from [<c001bd4c>] (__do_softirq+0xe4/0x1f0)
[ 403.678687] r7:00000101 r6:c0402000 r5:c059919c r4:00000001
[ 403.684498] [<c001bc68>] (__do_softirq+0x0/0x1f0) from [<c001c268>] (irq_exit+0x88/0xdc)
[ 403.692652] [<c001c1e0>] (irq_exit+0x0/0xdc) from [<c0009cc8>] (handle_IRQ+0x6c/0x8c)
[ 403.700514] r4:00000030 r3:00000110
[ 403.704192] [<c0009c5c>] (handle_IRQ+0x0/0x8c) from [<c0008714>] (avic_handle_irq+0x3c/0x48)
[ 403.712664] r5:c0403f28 r4:c0593ebc
[ 403.716343] [<c00086d8>] (avic_handle_irq+0x0/0x48) from [<c0008f84>] (__irq_svc+0x44/0x74)
[ 403.724733] Exception stack(0xc0403f28 to 0xc0403f70)
[ 403.729841] 3f20: 00000001 00000004 00000000 20000013 c0402000 c04104a8
[ 403.738078] 3f40: 00000002 c0b69620 a0004000 41069264 a03fb5f4 c0403f7c c0403f40 c0403f70
[ 403.746301] 3f60: c004b92c c0009e74 20000013 ffffffff
[ 403.751383] r6:ffffffff r5:20000013 r4:c0009e74 r3:c004b92c
[ 403.757210] [<c0009e30>] (arch_cpu_idle+0x0/0x4c) from [<c0040b04>] (cpu_startup_entry+0x88/0xf4)
[ 403.766161] [<c0040a7c>] (cpu_startup_entry+0x0/0xf4) from [<c02f00d0>] (rest_init+0xb8/0xe0)
[ 403.774753] [<c02f0018>] (rest_init+0x0/0xe0) from [<c03e07dc>] (start_kernel+0x28c/0x2d4)
[ 403.783051] r6:c03fc484 r5:ffffffff r4:c040a0e0
[ 403.787797] [<c03e0550>] (start_kernel+0x0/0x2d4) from [<a0008040>] (0xa0008040)
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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When perparing cyclic_dma buffers by the sound layer, it will dump the
following lockdep trace. The leading snd_pcm_action_single get called
with read_lock_irq called. To fix this, we change the kcalloc call from
GFP_KERNEL to GFP_ATOMIC.
WARNING: at kernel/lockdep.c:2740 lockdep_trace_alloc+0xcc/0x114()
DEBUG_LOCKS_WARN_ON(irqs_disabled_flags(flags))
Modules linked in:
CPU: 0 PID: 832 Comm: aplay Not tainted 3.11.0-20130823+ #903
Backtrace:
[<c000b98c>] (dump_backtrace+0x0/0x10c) from [<c000bb28>] (show_stack+0x18/0x1c)
r6:c004c090 r5:00000009 r4:c2e0bd18 r3:00404000
[<c000bb10>] (show_stack+0x0/0x1c) from [<c02f397c>] (dump_stack+0x20/0x28)
[<c02f395c>] (dump_stack+0x0/0x28) from [<c001531c>] (warn_slowpath_common+0x54/0x70)
[<c00152c8>] (warn_slowpath_common+0x0/0x70) from [<c00153dc>] (warn_slowpath_fmt+0x38/0x40)
r8:00004000 r7:a3b90000 r6:000080d0 r5:60000093 r4:c2e0a000 r3:00000009
[<c00153a4>] (warn_slowpath_fmt+0x0/0x40) from [<c004c090>] (lockdep_trace_alloc+0xcc/0x114)
r3:c03955d8 r2:c03907db
[<c004bfc4>] (lockdep_trace_alloc+0x0/0x114) from [<c008f16c>] (__kmalloc+0x34/0x118)
r6:000080d0 r5:c3800120 r4:000080d0 r3:c040a0f8
[<c008f138>] (__kmalloc+0x0/0x118) from [<c019c95c>] (imxdma_prep_dma_cyclic+0x64/0x168)
r7:a3b90000 r6:00000004 r5:c39d8420 r4:c3847150
[<c019c8f8>] (imxdma_prep_dma_cyclic+0x0/0x168) from [<c024618c>] (snd_dmaengine_pcm_trigger+0xa8/0x160)
[<c02460e4>] (snd_dmaengine_pcm_trigger+0x0/0x160) from [<c0241fa8>] (soc_pcm_trigger+0x90/0xb4)
r8:c058c7b0 r7:c3b8140c r6:c39da560 r5:00000001 r4:c3b81000
[<c0241f18>] (soc_pcm_trigger+0x0/0xb4) from [<c022ece4>] (snd_pcm_do_start+0x2c/0x38)
r7:00000000 r6:00000003 r5:c058c7b0 r4:c3b81000
[<c022ecb8>] (snd_pcm_do_start+0x0/0x38) from [<c022e958>] (snd_pcm_action_single+0x40/0x6c)
[<c022e918>] (snd_pcm_action_single+0x0/0x6c) from [<c022ea64>] (snd_pcm_action_lock_irq+0x7c/0x9c)
r7:00000003 r6:c3b810f0 r5:c3b810f0 r4:c3b81000
[<c022e9e8>] (snd_pcm_action_lock_irq+0x0/0x9c) from [<c023009c>] (snd_pcm_common_ioctl1+0x7f8/0xfd0)
r8:c3b7f888 r7:005407b8 r6:c2c991c0 r5:c3b81000 r4:c3b81000 r3:00004142
[<c022f8a4>] (snd_pcm_common_ioctl1+0x0/0xfd0) from [<c023117c>] (snd_pcm_playback_ioctl1+0x464/0x488)
[<c0230d18>] (snd_pcm_playback_ioctl1+0x0/0x488) from [<c02311d4>] (snd_pcm_playback_ioctl+0x34/0x40)
r8:c3b7f888 r7:00004142 r6:00000004 r5:c2c991c0 r4:005407b8
[<c02311a0>] (snd_pcm_playback_ioctl+0x0/0x40) from [<c00a14a4>] (vfs_ioctl+0x30/0x44)
[<c00a1474>] (vfs_ioctl+0x0/0x44) from [<c00a1fe8>] (do_vfs_ioctl+0x55c/0x5c0)
[<c00a1a8c>] (do_vfs_ioctl+0x0/0x5c0) from [<c00a208c>] (SyS_ioctl+0x40/0x68)
[<c00a204c>] (SyS_ioctl+0x0/0x68) from [<c0009380>] (ret_fast_syscall+0x0/0x44)
r8:c0009544 r7:00000036 r6:bedeaa58 r5:00000000 r4:000000c0
Signed-off-by: Michael Grzeschik <m.grzeschik@pengutronix.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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Commit d0380e6c3c0f6edb986d8798a23acfaf33d5df23 (early_printk:
consolidate random copies of identical code) added in 3.10 introduced
a check for con->index == -1 in early_console_register().
Initialize index to -1 for the xenboot console so earlyprintk=xen
works again.
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Also clean up the last item of the pci id list to be "cleaner".
Signed-off-by: David Cohen <david.a.cohen@linux.intel.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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The `insn_bits` handler `ni_65xx_dio_insn_bits()` has a `for` loop that
currently writes (optionally) and reads back up to 5 "ports" consisting
of 8 channels each. It reads up to 32 1-bit channels but can only read
and write a whole port at once - it needs to handle up to 5 ports as the
first channel it reads might not be aligned on a port boundary. It
breaks out of the loop early if the next port it handles is beyond the
final port on the card. It also breaks out early on the 5th port in the
loop if the first channel was aligned. Unfortunately, it doesn't check
that the current port it is dealing with belongs to the comedi subdevice
the `insn_bits` handler is acting on. That's a bug.
Redo the `for` loop to terminate after the final port belonging to the
subdevice, changing the loop variable in the process to simplify things
a bit. The `for` loop could now try and handle more than 5 ports if the
subdevice has more than 40 channels, but the test `if (bitshift >= 32)`
ensures it will break out early after 4 or 5 ports (depending on whether
the first channel is aligned on a port boundary). (`bitshift` will be
between -7 and 7 inclusive on the first iteration, increasing by 8 for
each subsequent operation.)
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Cc: <stable@vger.kernel.org> # 3.10.y 3.11.y 3.12.y
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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This patch bumps the default number of tags allocated per session by
iscsi-target via transport_alloc_session_tags() -> percpu_ida_init()
by another (tag_num / 2).
This is done to take into account the tags waiting to be acknowledged
and released in iscsit_ack_from_expstatsn(), but who's number are not
directly limited by the CmdSN Window queue_depth being enforced by
the target.
Using a larger value here is also useful to prevent percpu_ida_alloc()
from having to steal tags from other CPUs when no tags are available
on the local CPU, while waiting for unacknowledged tags to be released.
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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This patch converts iscsit_ack_from_expstatsn() to populate a local
ack_list of commands, and call iscsit_free_cmd() directly from RX
thread context, instead of using iscsit_add_cmd_to_immediate_queue()
to queue the acknowledged commands to be released from TX thread
context.
It is helpful to release the acknowledge commands as quickly as
possible, along with the associated percpu_ida tags, in order to
prevent percpu_ida_alloc() from having to steal tags from other
CPUs while waiting for iscsit_free_cmd() to happen from TX thread
context.
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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This patch changes transport_generic_free_cmd() to only wait_for_tasks
when shutdown=true is passed to iscsit_free_cmd().
With the advent of >= v3.10 iscsi-target code using se_cmd->cmd_kref,
the extra wait_for_tasks with shutdown=false is unnecessary, and may
end up causing an extra context switch when releasing WRITEs.
Cc: stable@vger.kernel.org # 3.10+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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This patch addresses a bug for backends such as IBLOCK that perform
asynchronous completion via transport_complete_cmd(), that will call
target_complete_failure_work() -> transport_generic_request_failure(),
upon exception status and invoke cmd->transport_complete_callback()
-> compare_and_write_callback() incorrectly during the failure case.
It adds a check for a non zero se_cmd->scsi_status within the first
invocation of compare_and_write_callback(), and will jump to out plus
up se_device->caw_sem before exiting the callback.
Reported-by: Thomas Glanzmann <thomas@glanzmann.de>
Tested-by: Thomas Glanzmann <thomas@glanzmann.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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This patch addresses a bug when compare_and_write_callback() invoked from
target_complete_ok_work() hits an failure from __target_execute_cmd() ->
cmd->execute_cmd(), that ends up calling transport_generic_request_failure()
-> compare_and_write_post(), thus causing SCF_COMPARE_AND_WRITE_POST to
incorrectly be set.
The result of this bug is that target_complete_ok_work() no longer hits
the if (!rc && !(cmd->se_cmd_flags & SCF_COMPARE_AND_WRITE_POST) check
that forces an immediate return, and instead double completes the se_cmd
in question, triggering an OOPs in the process.
This patch changes compare_and_write_post() to only set this bit when a
failure has not already occured to ensure the immediate return from within
target_complete_ok_work(), and thus allow transport_generic_request_failure()
to handle the sending of the CHECK_CONDITION exception status.
Reported-by: Thomas Glanzmann <thomas@glanzmann.de>
Tested-by: Thomas Glanzmann <thomas@glanzmann.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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This patch resets se_cmd->data_length for COMPARE_AND_WRITE emulation
within sbc_compare_and_write() to NoLB * block_size in order to address
a bug with FILEIO backends where a I/O failure will occur when data_length
does not match the I/O size being actually dispatched for the individual
per block READs + WRITEs.
This is done late enough in sbc_compare_and_write() after the memory
allocations have occured in transport_generic_new_cmd() to not cause
any unwanted side-effects.
Reported-by: Thomas Glanzmann <thomas@glanzmann.de>
Tested-by: Thomas Glanzmann <thomas@glanzmann.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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The SRP specification requires:
"Response data shall be provided in any SRP_RSP response that is sent in
response to an SRP_TSK_MGMT request (see 6.7). The information in the
RSP_CODE field (see table 24) shall indicate the completion status of
the task management function."
So fix this to avoid the SRP initiator interprets task management functions
that succeeded as failed.
Signed-off-by: Jack Wang <jinpu.wang@profitbricks.com>
Cc: stable@vger.kernel.org # 3.3+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
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When we do a treclaim or trecheckpoint we end up running with userspace
PPR and DSCR values. Currently we don't do anything special to avoid
running with user values which could cause a severe performance
degradation.
This patch moves the PPR and DSCR save and restore around treclaim and
trecheckpoint so that we run with user values for a much shorter period.
More care is taken with the PPR as it's impact is greater than the DSCR.
This is similar to user exceptions, where we run HTM_MEDIUM early to
ensure that we don't run with a userspace PPR values in the kernel.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Cc: <stable@vger.kernel.org> # 3.9+
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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We can't take IRQs in tm_reclaim as we might have a bogus r13 and r1.
This turns IRQs hard off in this function.
Signed-off-by: Michael Neuling <mikey@neuling.org>
Cc: <stable@vger.kernel.org> # 3.9+
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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Commit 4df4899 "Add power8 EBB support" included a bug in the handling
of the FAB_CRESP_MATCH and FAB_TYPE_MATCH fields.
These values are pulled out of the event code using EVENT_THR_CTL_SHIFT,
however we were then or'ing that value directly into MMCR1.
This meant we were failing to set the FAB fields correctly, and also
potentially corrupting the value for PMC4SEL. Leading to no counts for
the FAB events and incorrect counts for PMC4.
The fix is simply to shift left the FAB value correctly before or'ing it
with MMCR1.
Reported-by: Sooraj Ravindran Nair <soonair3@in.ibm.com>
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Cc: <stable@vger.kernel.org> # 3.10+
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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modalias_show() should return an empty string on error, not -ENODEV.
This causes the following false and annoying error:
> find /sys/devices -name modalias -print0 | xargs -0 cat >/dev/null
cat: /sys/devices/vio/4000/modalias: No such device
cat: /sys/devices/vio/4001/modalias: No such device
cat: /sys/devices/vio/4002/modalias: No such device
cat: /sys/devices/vio/4004/modalias: No such device
cat: /sys/devices/vio/modalias: No such device
Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: <stable@vger.kernel.org>
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Under heavy (DLPAR?) stress, we tripped this panic() in
arch/powerpc/kernel/iommu.c::iommu_init_table():
page = alloc_pages_node(nid, GFP_ATOMIC, get_order(sz));
if (!page)
panic("iommu_init_table: Can't allocate %ld bytes\n", sz);
Before the panic() we got a page allocation failure for an order-2
allocation. There appears to be memory free, but perhaps not in the
ATOMIC context. I looked through all the call-sites of
iommu_init_table() and didn't see any obvious reason to need an ATOMIC
allocation. Most call-sites in fact have an explicit GFP_KERNEL
allocation shortly before the call to iommu_init_table(), indicating we
are not in an atomic context. There is some indirection for some paths,
but I didn't see any locks indicating that GFP_KERNEL is inappropriate.
With this change under the same conditions, we have not been able to
reproduce the panic.
Signed-off-by: Nishanth Aravamudan <nacc@us.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: <stable@vger.kernel.org>
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arch/powerpc/kernel/sysfs.c exports PURR with write permission.
This may be valid for kernel in phyp mode. But writing to
the file in guest mode causes crash due to a priviledge violation
Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: <stable@vger.kernel.org>
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The csum_partial_copy_generic() function saves the PowerPC non-volatile
r14, r15, and r16 registers for the main checksum-and-copy loop.
Unfortunately, it fails to restore them upon error exit from this loop,
which results in silent corruption of these registers in the presumably
rare event of an access exception within that loop.
This commit therefore restores these register on error exit from the loop.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Anton Blanchard <anton@samba.org>
Cc: stable@vger.kernel.org
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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The csum_partial_copy_generic() uses register r7 to adjust the remaining
bytes to process. Unfortunately, r7 also holds a parameter, namely the
address of the flag to set in case of access exceptions while reading
the source buffer. Lacking a quantum implementation of PowerPC, this
commit instead uses register r9 to do the adjusting, leaving r7's
pointer uncorrupted.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Signed-off-by: Anton Blanchard <anton@samba.org>
Cc: stable@vger.kernel.org
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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Previous commit 46723bfa540... introduced a new config option
HAVE_BOOTMEM_INFO_NODE that ended up breaking memory hot-remove for ppc
when sparse vmemmap is not defined.
This patch defines HAVE_BOOTMEM_INFO_NODE for ppc and adds the call to
register_page_bootmem_info_node. Without this we get a BUG_ON for memory
hot remove in put_page_bootmem().
This also adds a stub for register_page_bootmem_memmap to allow ppc to build
with sparse vmemmap defined. Leaving this as a stub is fine since the same
vmemmap addresses are also handled in vmemmap_populate and as such are
properly mapped.
Signed-off-by: Nathan Fontenot <nfont@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: <stable@vger.kernel.org> [v3.9+]
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gfn_to_memslot() can return NULL or invalid slot. We need to check slot
validity before accessing it.
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
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bootup warning
IORESOURCE_BUSY is used to mark temporary driver mem-resources
instead of global regions. This suppresses warnings if regions
overlap with a region marked as BUSY.
This was always the case for VESA/VGA/EFI framebuffer regions so
do the same for simplefb regions. The reason we do this is to
allow device handover to real GPU drivers like
i915/radeon/nouveau which get the same regions via PCI BARs.
Maybe at some point we will be able to unregister platform
devices properly during the handover. In this case the simplefb
region would get removed before the new region is created.
However, this is currently not the case and would require rather
huge changes in remove_conflicting_framebuffers(). Add the BUSY
marker now and try to eventually rewrite the handover for a next release.
Also see kernel/resource.c for more information:
/*
* if a resource is "BUSY", it's not a hardware resource
* but a driver mapping of such a resource; we don't want
* to warn for those; some drivers legitimately map only
* partial hardware resources. (example: vesafb)
*/
This suppresses warnings like:
------------[ cut here ]------------
WARNING: CPU: 2 PID: 199 at arch/x86/mm/ioremap.c:171 __ioremap_caller+0x2e3/0x390()
Info: mapping multiple BARs. Your kernel is fine.
Call Trace:
dump_stack+0x54/0x8d
warn_slowpath_common+0x7d/0xa0
warn_slowpath_fmt+0x4c/0x50
iomem_map_sanity_check+0xac/0xe0
__ioremap_caller+0x2e3/0x390
ioremap_wc+0x32/0x40
i915_driver_load+0x670/0xf50 [i915]
...
Reported-by: Tom Gundersen <teg@jklm.no>
Tested-by: Tom Gundersen <teg@jklm.no>
Tested-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: David Herrmann <dh.herrmann@gmail.com>
Link: http://lkml.kernel.org/r/1380724864-1757-1-git-send-email-dh.herrmann@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Previously, when a signal was registered with SA_SIGINFO, parameters 2
and 3 of the signal handler were written to registers r1 and r2 before
the register set was saved. This led to corruption of these two
registers after returning from the signal handler (the wrong values were
restored).
With this patch, registers are now saved before any parameters are
passed, thus maintaining the processor state from before signal entry.
Signed-off-by: Christian Ruppert <christian.ruppert@abilis.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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