Revert "dm: make sure dm_table is binded before queue request"

hulk inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I7FI78

--------------------------------

This reverts commit 90d1a836.

It's not proper to just abort IO when the map is not ready.
So revert this and requeue IO to keep consistent with the community.
Signed-off-by: NLi Lingfeng <lilingfeng3@huawei.com>
Reviewed-by: NYu Kuai <yukuai3@huawei.com>
Signed-off-by: NYongqiang Liu <liuyongqiang13@huawei.com>

drivers/md/dm-rq.c

@@ -752,15 +752,8 @@ static blk_status_t dm_mq_queue_rq(struct blk_mq_hw_ctx *hctx,
 
 	if (unlikely(!ti)) {
 		int srcu_idx;
-		struct dm_table *map;
+		struct dm_table *map = dm_get_live_table(md, &srcu_idx);
 
-		map = dm_get_live_table(md, &srcu_idx);
-		if (!map) {
-			DMERR_LIMIT("%s: mapping table unavailable, erroring io",
-				    dm_device_name(md));
-			dm_put_live_table(md, srcu_idx);
-			return BLK_STS_IOERR;
-		}
 		ti = dm_table_find_target(map, 0);
 		dm_put_live_table(md, srcu_idx);
 	}