blk-mq: add missing blk_mq_put_ctx

In case of failure to queue to the lower level driver, we
enqueue it via blk_mq_insert_request() and return while
holding a cpu reference.

Give up the currently held reference before calling
blk_mq_insert_request().

Orabug: 26339553

Suggested-by: Bhavesh Davda <bhavesh.davda@oracle.com>
Reviewed-by: Jianchao Wang <jianchao.w.wang@oracle.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Ankur Arora <ankur.a.arora@oracle.com>

diff --git a/block/blk-mq.c b/block/blk-mq.c
index 93246bc6ec75f1d5ad9a95c23c1c9b646ea2cdc9..ef97afd4a473435a9235fed5952c8bf8ec309726 100644 (file)
--- a/block/blk-mq.c
+++ b/block/blk-mq.c
@@ -1273,6 +1273,7 @@ static void blk_mq_make_request(struct request_queue *q, struct bio *bio)
                                blk_mq_end_request(rq, rq->errors);
                                goto done;
                        }
+                       blk_mq_put_ctx(data.ctx);
                        blk_mq_insert_request(rq, false, true, true);
                        return;
                }