blk-mq: remove dead check from blk_mq_dispatch_rq_list

When BLK_STS_RESOURCE or BLK_STS_DEV_RESOURCE is returned from .queue_rq, the 'list' variable always holds this rq which isn't queued to LLD successfully. So blk_mq_dispatch_rq_list() always returns false from the branch of '!list_empty(list)'. No functional change. Signed-off-by: Ming Lei <[email protected]> Tested-by: Baolin Wang <[email protected]> Reviewed-by: Johannes Thumshirn <[email protected]> Reviewed-by: Sagi Grimberg <[email protected]> Reviewed-by: Christoph Hellwig <[email protected]> Cc: Sagi Grimberg <[email protected]> Cc: Baolin Wang <[email protected]> Cc: Christoph Hellwig <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
ashr · Jun 30, 2020 · bbdb3c5 · bbdb3c5
1 parent 7538352
commit bbdb3c5
Showing 1 changed file with 0 additions and 7 deletions.
diff --git a/block/blk-mq.c b/block/blk-mq.c
@@ -1426,13 +1426,6 @@ bool blk_mq_dispatch_rq_list(struct blk_mq_hw_ctx *hctx, struct list_head *list,
 	} else
 		blk_mq_update_dispatch_busy(hctx, false);
 
-	/*
-	 * If the host/device is unable to accept more work, inform the
-	 * caller of that.
-	 */
-	if (ret == BLK_STS_RESOURCE || ret == BLK_STS_DEV_RESOURCE)
-		return false;
-
 	return (queued + errors) != 0;
 }