dm mpath: take m->lock spinlock when testing QUEUE_IF_NO_PATH

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Fix multipath_end_io, multipath_end_io_bio and multipath_busy to take
m->lock while testing if MPATHF_QUEUE_IF_NO_PATH bit is set.  These are
all slow-path cases when no paths are available so extra locking isn't a
performance hit.  Correctness matters most.

Signed-off-by: Mike Snitzer <snitzer@redhat.com>

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This commit is contained in:

Mike Snitzer 2020-06-10 16:07:57 -04:00

parent 69cea0d45a

commit a271a89c6e

1 changed files with 34 additions and 18 deletions

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52

drivers/md/dm-mpath.c

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