diff options
| author | Mike Snitzer <snitzer@redhat.com> | 2017-11-25 00:27:26 -0500 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2017-12-04 10:23:10 -0500 |
| commit | afc567a4977b2d798e05153dd131a3c8d4758c0c (patch) | |
| tree | 8d5abb8627ae852a7dc191ffac9dfb27c58d1635 /drivers/md/dm-snap.c | |
| parent | ae64f9bd1d3621b5e60d7363bc20afb46aede215 (diff) | |
| download | lwn-afc567a4977b2d798e05153dd131a3c8d4758c0c.tar.gz lwn-afc567a4977b2d798e05153dd131a3c8d4758c0c.zip | |
dm table: fix regression from improper dm_dev_internal.count refcount_t conversion
Multiple refcounts are needed if the device was already added. The
micro-optimization of setting the refcount to 1 on first added (rather
than fall thru to a common refcount_inc) lost sight of the fact that the
refcount_inc is also needed for the case when the device already exists
and the mode need not be upgraded.
Fixes: 2a0b4682e0 ("dm: convert dm_dev_internal.count from atomic_t to refcount_t")
Reported-by: Zdenek Kabelac <zkabelac@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-snap.c')
0 files changed, 0 insertions, 0 deletions