This avoids that new requests are queued while __dm_destroy() is in
progress.
Signed-off-by: Bart Van Assche <bart.vanassche@xxxxxxxxxxx>
---
drivers/md/dm.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/md/dm.c b/drivers/md/dm.c
index 0775411..4aa7030 100644
--- a/drivers/md/dm.c
+++ b/drivers/md/dm.c
@@ -1875,6 +1875,7 @@ 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;
@@ -1885,6 +1886,10 @@ 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);
--
2.9.3
--
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