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| author | Mikulas Patocka <mpatocka@redhat.com> | 2015-02-27 14:04:27 -0500 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2015-05-09 23:16:25 +0100 |
| commit | 361a387fabc76ca346bbcc88ba9c99ef9e7e4691 (patch) | |
| tree | 3f5d25129dd58265860fdfa6a01dd82405efcb32 /drivers/md | |
| parent | 231f9006539c8cee38ec16329dfce18eebb5644e (diff) | |
| download | kernel_samsung_smdk4412-361a387fabc76ca346bbcc88ba9c99ef9e7e4691.zip kernel_samsung_smdk4412-361a387fabc76ca346bbcc88ba9c99ef9e7e4691.tar.gz kernel_samsung_smdk4412-361a387fabc76ca346bbcc88ba9c99ef9e7e4691.tar.bz2 | |
dm: hold suspend_lock while suspending device during device deletion
commit ab7c7bb6f4ab95dbca96fcfc4463cd69843e3e24 upstream.
__dm_destroy() must take the suspend_lock so that its presuspend and
postsuspend calls do not race with an internal suspend.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/dm.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c index d38d524..c00bcdc 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -2295,10 +2295,16 @@ static void __dm_destroy(struct mapped_device *md, bool wait) set_bit(DMF_FREEING, &md->flags); spin_unlock(&_minor_lock); + /* + * Take suspend_lock so that presuspend and postsuspend methods + * do not race with internal suspend. + */ + mutex_lock(&md->suspend_lock); if (!dm_suspended_md(md)) { dm_table_presuspend_targets(map); dm_table_postsuspend_targets(map); } + mutex_unlock(&md->suspend_lock); /* * Rare, but there may be I/O requests still going to complete, |