diff options
| -rw-r--r-- | drivers/block/elevator.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/block/elevator.c b/drivers/block/elevator.c index 36f1057084b0..d4a49a3df829 100644 --- a/drivers/block/elevator.c +++ b/drivers/block/elevator.c @@ -369,9 +369,14 @@ void __elv_add_request(request_queue_t *q, struct request *rq, int where, case ELEVATOR_INSERT_SORT: BUG_ON(!blk_fs_request(rq)); rq->flags |= REQ_SORTED; - q->elevator->ops->elevator_add_req_fn(q, rq); if (q->last_merge == NULL && rq_mergeable(rq)) q->last_merge = rq; + /* + * Some ioscheds (cfq) run q->request_fn directly, so + * rq cannot be accessed after calling + * elevator_add_req_fn. + */ + q->elevator->ops->elevator_add_req_fn(q, rq); break; default: |