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authorBart Van Assche <bart.vanassche@sandisk.com>2016-08-31 15:17:49 -0700
committerMike Snitzer <snitzer@redhat.com>2016-09-14 13:56:38 -0400
commit3b785fbcf81c3533772c52b717f77293099498d3 (patch)
tree365626385e69b8ce18ae85e0177e2f1ea61995e9 /drivers/md
parent8dc23658b7aaa8b6b0609c81c8ad75e98b612801 (diff)
dm: mark request_queue dead before destroying the DM device
This avoids that new requests are queued while __dm_destroy() is in progress. Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/dm.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index c0742129a9cb..0f2928b3136b 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1873,6 +1873,7 @@ EXPORT_SYMBOL_GPL(dm_device_name);
static void __dm_destroy(struct mapped_device *md, bool wait)
{
+ struct request_queue *q = dm_get_md_queue(md);
struct dm_table *map;
int srcu_idx;
@@ -1883,6 +1884,10 @@ static void __dm_destroy(struct mapped_device *md, bool wait)
set_bit(DMF_FREEING, &md->flags);
spin_unlock(&_minor_lock);
+ spin_lock_irq(q->queue_lock);
+ queue_flag_set(QUEUE_FLAG_DYING, q);
+ spin_unlock_irq(q->queue_lock);
+
if (dm_request_based(md) && md->kworker_task)
flush_kthread_worker(&md->kworker);