blk-mq: insert rq with DONTPREP to hctx dispatch list when requeue

[mirror_ubuntu-hirsute-kernel.git] / block / blk-mq.c

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 8f5b533764ca0c286ec0d34b3462d7e64e3713d9..9437a5eb07cff63062ed459afc0b6b90e685e6f7 100644 (file)
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -737,12 +737,20 @@ static void blk_mq_requeue_work(struct work_struct *work)
        spin_unlock_irq(&q->requeue_lock);
 
        list_for_each_entry_safe(rq, next, &rq_list, queuelist) {
-               if (!(rq->rq_flags & RQF_SOFTBARRIER))
+               if (!(rq->rq_flags & (RQF_SOFTBARRIER | RQF_DONTPREP)))
                        continue;
 
                rq->rq_flags &= ~RQF_SOFTBARRIER;
                list_del_init(&rq->queuelist);
-               blk_mq_sched_insert_request(rq, true, false, false);
+               /*
+                * If RQF_DONTPREP, rq has contained some driver specific
+                * data, so insert it to hctx dispatch list to avoid any
+                * merge.
+                */
+               if (rq->rq_flags & RQF_DONTPREP)
+                       blk_mq_request_bypass_insert(rq, false);
+               else
+                       blk_mq_sched_insert_request(rq, true, false, false);
        }
 
        while (!list_empty(&rq_list)) {