diff options
| -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 73f28802dc7a..e79d5ccfda64 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -2638,10 +2638,16 @@ static void __dm_destroy(struct mapped_device *md, bool wait) if (dm_request_based(md)) flush_kthread_worker(&md->kworker); + /* + * 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); |