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-rw-r--r--block/blk-mq.c45
1 files changed, 28 insertions, 17 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c
index 65f43bd696a0..66f3cf9c436d 100644
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1198,7 +1198,7 @@ static struct request *blk_mq_map_request(struct request_queue *q,
return rq;
}
-static int blk_mq_direct_issue_request(struct request *rq)
+static int blk_mq_direct_issue_request(struct request *rq, blk_qc_t *cookie)
{
int ret;
struct request_queue *q = rq->q;
@@ -1209,6 +1209,7 @@ static int blk_mq_direct_issue_request(struct request *rq)
.list = NULL,
.last = 1
};
+ blk_qc_t new_cookie = blk_tag_to_qc_t(rq->tag, hctx->queue_num);
/*
* For OK queue, we are done. For error, kill it. Any other
@@ -1216,18 +1217,21 @@ static int blk_mq_direct_issue_request(struct request *rq)
* would have done
*/
ret = q->mq_ops->queue_rq(hctx, &bd);
- if (ret == BLK_MQ_RQ_QUEUE_OK)
+ if (ret == BLK_MQ_RQ_QUEUE_OK) {
+ *cookie = new_cookie;
return 0;
- else {
- __blk_mq_requeue_request(rq);
+ }
- if (ret == BLK_MQ_RQ_QUEUE_ERROR) {
- rq->errors = -EIO;
- blk_mq_end_request(rq, rq->errors);
- return 0;
- }
- return -1;
+ __blk_mq_requeue_request(rq);
+
+ if (ret == BLK_MQ_RQ_QUEUE_ERROR) {
+ *cookie = BLK_QC_T_NONE;
+ rq->errors = -EIO;
+ blk_mq_end_request(rq, rq->errors);
+ return 0;
}
+
+ return -1;
}
/*
@@ -1244,6 +1248,7 @@ static blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio)
unsigned int request_count = 0;
struct blk_plug *plug;
struct request *same_queue_rq = NULL;
+ blk_qc_t cookie;
blk_queue_bounce(q, &bio);
@@ -1265,6 +1270,8 @@ static blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio)
if (unlikely(!rq))
return BLK_QC_T_NONE;
+ cookie = blk_tag_to_qc_t(rq->tag, data.hctx->queue_num);
+
if (unlikely(is_flush_fua)) {
blk_mq_bio_to_request(rq, bio);
blk_insert_flush(rq);
@@ -1302,11 +1309,11 @@ static blk_qc_t blk_mq_make_request(struct request_queue *q, struct bio *bio)
old_rq = rq;
blk_mq_put_ctx(data.ctx);
if (!old_rq)
- return BLK_QC_T_NONE;
- if (!blk_mq_direct_issue_request(old_rq))
- return BLK_QC_T_NONE;
+ goto done;
+ if (!blk_mq_direct_issue_request(old_rq, &cookie))
+ goto done;
blk_mq_insert_request(old_rq, false, true, true);
- return BLK_QC_T_NONE;
+ goto done;
}
if (!blk_mq_merge_queue_io(data.hctx, data.ctx, rq, bio)) {
@@ -1320,7 +1327,8 @@ run_queue:
blk_mq_run_hw_queue(data.hctx, !is_sync || is_flush_fua);
}
blk_mq_put_ctx(data.ctx);
- return BLK_QC_T_NONE;
+done:
+ return cookie;
}
/*
@@ -1335,6 +1343,7 @@ static blk_qc_t blk_sq_make_request(struct request_queue *q, struct bio *bio)
unsigned int request_count = 0;
struct blk_map_ctx data;
struct request *rq;
+ blk_qc_t cookie;
blk_queue_bounce(q, &bio);
@@ -1353,6 +1362,8 @@ static blk_qc_t blk_sq_make_request(struct request_queue *q, struct bio *bio)
if (unlikely(!rq))
return BLK_QC_T_NONE;
+ cookie = blk_tag_to_qc_t(rq->tag, data.hctx->queue_num);
+
if (unlikely(is_flush_fua)) {
blk_mq_bio_to_request(rq, bio);
blk_insert_flush(rq);
@@ -1375,7 +1386,7 @@ static blk_qc_t blk_sq_make_request(struct request_queue *q, struct bio *bio)
}
list_add_tail(&rq->queuelist, &plug->mq_list);
blk_mq_put_ctx(data.ctx);
- return BLK_QC_T_NONE;
+ return cookie;
}
if (!blk_mq_merge_queue_io(data.hctx, data.ctx, rq, bio)) {
@@ -1390,7 +1401,7 @@ run_queue:
}
blk_mq_put_ctx(data.ctx);
- return BLK_QC_T_NONE;
+ return cookie;
}
/*