Dan Williams bd3fa7572a block: fix ext_dev_lock lockdep report ... commit 4d66e5e9b6d720d8463e11d027bd4ad91c8b1318 upstream. ================================= [ INFO: inconsistent lock state ] 4.1.0-rc7+ #217 Tainted: G O --------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. swapper/6/0 [HC0[0]:SC1[1]:HE1:SE0] takes: (ext_devt_lock){+.?...}, at: [<ffffffff8143a60c>] blk_free_devt+0x3c/0x70 {SOFTIRQ-ON-W} state was registered at: [<ffffffff810bf6b1>] __lock_acquire+0x461/0x1e70 [<ffffffff810c1947>] lock_acquire+0xb7/0x290 [<ffffffff818ac3a8>] _raw_spin_lock+0x38/0x50 [<ffffffff8143a07d>] blk_alloc_devt+0x6d/0xd0 <-- take the lock in process context [..] [<ffffffff810bf64e>] __lock_acquire+0x3fe/0x1e70 [<ffffffff810c00ad>] ? __lock_acquire+0xe5d/0x1e70 [<ffffffff810c1947>] lock_acquire+0xb7/0x290 [<ffffffff8143a60c>] ? blk_free_devt+0x3c/0x70 [<ffffffff818ac3a8>] _raw_spin_lock+0x38/0x50 [<ffffffff8143a60c>] ? blk_free_devt+0x3c/0x70 [<ffffffff8143a60c>] blk_free_devt+0x3c/0x70 <-- take the lock in softirq [<ffffffff8143bfec>] part_release+0x1c/0x50 [<ffffffff8158edf6>] device_release+0x36/0xb0 [<ffffffff8145ac2b>] kobject_cleanup+0x7b/0x1a0 [<ffffffff8145aad0>] kobject_put+0x30/0x70 [<ffffffff8158f147>] put_device+0x17/0x20 [<ffffffff8143c29c>] delete_partition_rcu_cb+0x16c/0x180 [<ffffffff8143c130>] ? read_dev_sector+0xa0/0xa0 [<ffffffff810e0e0f>] rcu_process_callbacks+0x2ff/0xa90 [<ffffffff810e0dcf>] ? rcu_process_callbacks+0x2bf/0xa90 [<ffffffff81067e2e>] __do_softirq+0xde/0x600 Neil sees this in his tests and it also triggers on pmem driver unbind for the libnvdimm tests. This fix is on top of an initial fix by Keith for incorrect usage of mutex_lock() in this path: 2da78092dd "block: Fix dev_t minor allocation lifetime". Both this and 2da78092dd are candidates for -stable. Fixes: 2da78092dd ("block: Fix dev_t minor allocation lifetime") Cc: Keith Busch <keith.busch@intel.com> Reported-by: NeilBrown <neilb@suse.de> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Jens Axboe <axboe@fb.com> [lizf: Backported to 3.4: adjust context] Signed-off-by: Zefan Li <lizefan@huawei.com>		2015-09-18 09:20:46 +08:00
..
partitions	LDM: Fix reassembly of extended VBLKs.	2012-02-24 09:37:42 +00:00
blk-cgroup.c	Merge branch 'for-3.4' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup	2012-03-20 18:11:21 -07:00
blk-cgroup.h
blk-core.c	blktrace: fix accounting of partially completed requests	2014-05-18 05:25:55 -07:00
blk-exec.c	block: Don't access request after it might be freed	2014-03-11 16:10:06 -07:00
blk-flush.c
blk-integrity.c
blk-ioc.c	block: fix ioc leak in put_io_context	2012-03-14 15:34:48 +01:00
blk-iopoll.c
blk-lib.c	block: add cond_resched() to potentially long running ioctl discard loop	2014-02-22 10:32:46 -08:00
blk-map.c
blk-merge.c	block: separate out blk_rq_merge_ok() and blk_try_merge() from elevator functions	2012-02-08 09:19:38 +01:00
blk-settings.c	block: fix alignment_offset math that assumes io_min is a power-of-2	2015-02-02 17:04:48 +08:00
blk-softirq.c	sched, block: Unify cache detection	2012-01-27 13:28:48 +01:00
blk-sysfs.c	block: avoid using uninitialized value in from queue_var_store	2013-04-12 09:38:46 -07:00
blk-tag.c	block: don't assume last put of shared tags is for the host	2014-07-31 12:54:51 -07:00
blk-throttle.c	block: use lockdep_assert_held for queue locking	2012-03-30 12:33:28 +02:00
blk-timeout.c	block: fix race between request completion and timeout handling	2013-11-29 10:50:35 -08:00
blk.h	Merge branch 'linus' into sched/core	2012-03-01 10:26:43 +01:00
bsg-lib.c
bsg.c	bsg: fix sysfs link remove warning	2012-02-08 20:02:03 +01:00
cfq-iosched.c	block: Make cfq_target_latency tunable through sysfs.	2012-04-01 14:33:39 -07:00
cfq.h
compat_ioctl.c
deadline-iosched.c
elevator.c	elevator: acquire q->sysfs_lock in elevator_change()	2013-12-08 07:29:43 -08:00
genhd.c	block: fix ext_dev_lock lockdep report	2015-09-18 09:20:46 +08:00
ioctl.c
Kconfig
Kconfig.iosched
Makefile
noop-iosched.c
partition-generic.c	block: Fix dev_t minor allocation lifetime	2014-12-01 18:02:26 +08:00
scsi_ioctl.c	scsi: Fix error handling in SCSI_IOCTL_SEND_COMMAND	2015-02-02 17:05:03 +08:00