diff options
| author | Mikulas Patocka <mpatocka@redhat.com> | 2015-02-27 14:04:27 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-04-13 14:03:02 +0200 |
| commit | efad4bcc37b3d5f528f0a118b4dbaf5079e0c2f2 (patch) | |
| tree | 98e4534a1a3b0052ca3c624293ba267232eafd8e | |
| parent | 1be347b870e07a0cff57bcba2bbf5f538c68d6a4 (diff) | |
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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 1582c3dac3ac..e40059143272 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -2352,10 +2352,16 @@ 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); /* dm_put_live_table must be before msleep, otherwise deadlock is possible */ dm_put_live_table(md, srcu_idx); |