forked from Minki/linux
dm: don't schedule delayed run of the queue if nothing to do
In request-based DM's dm_request_fn(), if blk_peek_request() returns NULL just return. Avoids unnecessary blk_delay_queue(). Reported-by: Jens Axboe <axboe@fb.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
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9d1deb83d4
@ -1963,7 +1963,7 @@ static void dm_request_fn(struct request_queue *q)
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while (!blk_queue_stopped(q)) {
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rq = blk_peek_request(q);
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if (!rq)
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goto delay_and_out;
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goto out;
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/* always use block 0 to find the target for flushes for now */
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pos = 0;
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