blk-mq-sched: Fix blk_mq_sched_alloc_tags() error handling

[linux-2.6-microblaze.git] / block / blk-mq.h

diff --git a/block/blk-mq.h b/block/blk-mq.h
index 9ce64bc..d08779f 100644 (file)
--- a/block/blk-mq.h
+++ b/block/blk-mq.h
@@ -47,6 +47,7 @@ void blk_mq_add_to_requeue_list(struct request *rq, bool at_head,
 void blk_mq_flush_busy_ctxs(struct blk_mq_hw_ctx *hctx, struct list_head *list);
 struct request *blk_mq_dequeue_from_ctx(struct blk_mq_hw_ctx *hctx,
                                        struct blk_mq_ctx *start);
+void blk_mq_put_rq_ref(struct request *rq);
 
 /*
  * Internal helpers for allocating/freeing the request map
@@ -259,6 +260,8 @@ static inline void blk_mq_put_driver_tag(struct request *rq)
        __blk_mq_put_driver_tag(rq->mq_hctx, rq);
 }
 
+bool blk_mq_get_driver_tag(struct request *rq);
+
 static inline void blk_mq_clear_mq_map(struct blk_mq_queue_map *qmap)
 {
        int cpu;
@@ -299,6 +302,17 @@ static inline struct blk_plug *blk_mq_plug(struct request_queue *q,
        return NULL;
 }
 
+/* Free all requests on the list */
+static inline void blk_mq_free_requests(struct list_head *list)
+{
+       while (!list_empty(list)) {
+               struct request *rq = list_entry_rq(list->next);
+
+               list_del_init(&rq->queuelist);
+               blk_mq_free_request(rq);
+       }
+}
+
 /*
  * For shared tag users, we track the number of currently active users
  * and attempt to provide a fair share of the tag depth for each of them.