diff options
| -rw-r--r-- | drivers/nvme/host/pci.c | 39 |
1 files changed, 17 insertions, 22 deletions
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 0aa26a33f231..ec1c44c75d92 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -906,9 +906,10 @@ static blk_status_t nvme_queue_rq(struct blk_mq_hw_ctx *hctx, static void nvme_submit_cmds(struct nvme_queue *nvmeq, struct request **rqlist) { + struct request *req; + spin_lock(&nvmeq->sq_lock); - while (!rq_list_empty(*rqlist)) { - struct request *req = rq_list_pop(rqlist); + while ((req = rq_list_pop(rqlist))) { struct nvme_iod *iod = blk_mq_rq_to_pdu(req); nvme_sq_copy_cmd(nvmeq, &iod->cmd); @@ -933,31 +934,25 @@ static bool nvme_prep_rq_batch(struct nvme_queue *nvmeq, struct request *req) static void nvme_queue_rqs(struct request **rqlist) { - struct request *req, *next, *prev = NULL; + struct request *submit_list = NULL; struct request *requeue_list = NULL; + struct request **requeue_lastp = &requeue_list; + struct nvme_queue *nvmeq = NULL; + struct request *req; - rq_list_for_each_safe(rqlist, req, next) { - struct nvme_queue *nvmeq = req->mq_hctx->driver_data; - - if (!nvme_prep_rq_batch(nvmeq, req)) { - /* detach 'req' and add to remainder list */ - rq_list_move(rqlist, &requeue_list, req, prev); - - req = prev; - if (!req) - continue; - } + while ((req = rq_list_pop(rqlist))) { + if (nvmeq && nvmeq != req->mq_hctx->driver_data) + nvme_submit_cmds(nvmeq, &submit_list); + nvmeq = req->mq_hctx->driver_data; - if (!next || req->mq_hctx != next->mq_hctx) { - /* detach rest of list, and submit */ - req->rq_next = NULL; - nvme_submit_cmds(nvmeq, rqlist); - *rqlist = next; - prev = NULL; - } else - prev = req; + if (nvme_prep_rq_batch(nvmeq, req)) + rq_list_add(&submit_list, req); /* reverse order */ + else + rq_list_add_tail(&requeue_lastp, req); } + if (nvmeq) + nvme_submit_cmds(nvmeq, &submit_list); *rqlist = requeue_list; } |