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block: Fix blk_start_queueing() to not kick a stopped queue

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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>
This commit is contained in:
Elias Oltmanns 2008-10-01 16:02:33 +02:00 committed by Jens Axboe
parent c0ddffa84a
commit 336c3d8ce7
1 changed files with 4 additions and 2 deletions
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6
block/blk-core.c
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@ -890,9 +890,11 @@ EXPORT_SYMBOL(blk_get_request);
*/
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);