block: Fix blk_start_queueing() to not kick a stopped queue
blk_start_queueing() should act like the generic queue unplugging
and kicking and ignore a stopped queue. Such a queue may not be
run until after a call to blk_start_queue().
Signed-off-by: Elias Oltmanns <eo@nebensachen.de>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/block/blk-core.c b/block/blk-core.c
index fa21234..c66333d 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -890,9 +890,11 @@
*/
void blk_start_queueing(struct request_queue *q)
{
- if (!blk_queue_plugged(q))
+ if (!blk_queue_plugged(q)) {
+ if (unlikely(blk_queue_stopped(q)))
+ return;
q->request_fn(q);
- else
+ } else
__generic_unplug_device(q);
}
EXPORT_SYMBOL(blk_start_queueing);