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(parent: 1b27b9e) | 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)
commit00fa5fba4e35fc62300d63c36513045b5254240c
tree9892d1a825e80cd6299ec49e3279166124a551f9tree | snapshot
parent1b27b9e2ece791aee2a2cd932bd5ba70114397e9commit | diff
dm mpath: fix lock order inconsistency in multipath_ioctl

Commit 69926ce92bd ("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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