From 83a12fb77b941a6735026e46c8ef5f4ec1204e97 Mon Sep 17 00:00:00 2001 From: Sagi Grimberg Date: Sun, 18 Jun 2017 17:28:08 +0300 Subject: [PATCH] nvme-pci: factor out cqe handling into a dedicated routine Makes the code slightly more readable. Signed-off-by: Sagi Grimberg Reviewed-by: Christoph Hellwig Signed-off-by: Keith Busch Signed-off-by: Jens Axboe --- drivers/nvme/host/pci.c | 53 ++++++++++++++++++++++++++++--------------------- 1 file changed, 30 insertions(+), 23 deletions(-) diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c index 042cfe5..26eb174 100644 --- a/drivers/nvme/host/pci.c +++ b/drivers/nvme/host/pci.c @@ -741,6 +741,35 @@ static inline void nvme_ring_cq_doorbell(struct nvme_queue *nvmeq) } } +static inline void nvme_handle_cqe(struct nvme_queue *nvmeq, + struct nvme_completion *cqe) +{ + struct request *req; + + if (unlikely(cqe->command_id >= nvmeq->q_depth)) { + dev_warn(nvmeq->dev->ctrl.device, + "invalid id %d completed on queue %d\n", + cqe->command_id, le16_to_cpu(cqe->sq_id)); + return; + } + + /* + * AEN requests are special as they don't time out and can + * survive any kind of queue freeze and often don't respond to + * aborts. We don't even bother to allocate a struct request + * for them but rather special case them here. + */ + if (unlikely(nvmeq->qid == 0 && + cqe->command_id >= NVME_AQ_BLKMQ_DEPTH)) { + nvme_complete_async_event(&nvmeq->dev->ctrl, + cqe->status, &cqe->result); + return; + } + + req = blk_mq_tag_to_rq(*nvmeq->tags, cqe->command_id); + nvme_end_request(req, cqe->status, cqe->result); +} + static void __nvme_process_cq(struct nvme_queue *nvmeq, unsigned int *tag) { u16 head, phase; @@ -750,7 +779,6 @@ static void __nvme_process_cq(struct nvme_queue *nvmeq, unsigned int *tag) while (nvme_cqe_valid(nvmeq, head, phase)) { struct nvme_completion cqe = nvmeq->cqes[head]; - struct request *req; if (++head == nvmeq->q_depth) { head = 0; @@ -760,28 +788,7 @@ static void __nvme_process_cq(struct nvme_queue *nvmeq, unsigned int *tag) if (tag && *tag == cqe.command_id) *tag = -1; - if (unlikely(cqe.command_id >= nvmeq->q_depth)) { - dev_warn(nvmeq->dev->ctrl.device, - "invalid id %d completed on queue %d\n", - cqe.command_id, le16_to_cpu(cqe.sq_id)); - continue; - } - - /* - * AEN requests are special as they don't time out and can - * survive any kind of queue freeze and often don't respond to - * aborts. We don't even bother to allocate a struct request - * for them but rather special case them here. - */ - if (unlikely(nvmeq->qid == 0 && - cqe.command_id >= NVME_AQ_BLKMQ_DEPTH)) { - nvme_complete_async_event(&nvmeq->dev->ctrl, - cqe.status, &cqe.result); - continue; - } - - req = blk_mq_tag_to_rq(*nvmeq->tags, cqe.command_id); - nvme_end_request(req, cqe.status, cqe.result); + nvme_handle_cqe(nvmeq, &cqe); } if (head == nvmeq->cq_head && phase == nvmeq->cq_phase) -- 2.7.4