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(parent: 7b679a5) | patch
dm mpath: fix lock order inconsistency in multipath_ioctl
authorMike Snitzer <snitzer@redhat.com>
Tue, 13 May 2014 17:49:39 +0000 (13:49 -0400)
committerMike Snitzer <snitzer@redhat.com>
Wed, 14 May 2014 20:12:17 +0000 (16:12 -0400)
commit13b102f320714e57363f2152da67c79dec80c057
tree9892d1a825e80cd6299ec49e3279166124a551f9tree | snapshot
parent7b679a520fb776173f15586ea2827f82c04c32e6commit | diff
dm mpath: fix lock order inconsistency in multipath_ioctl

Commit 45f036369d9 ("dm mpath: remove process_queued_ios()") did not
consistently take the multipath device's spinlock (m->lock) before
calling dm_table_run_md_queue_async() -- which takes the q->queue_lock.

Found with code inspection using hint from reported lockdep warning.

Reported-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
drivers/md/dm-mpath.c diff | blob | history
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