nvme-pci: factor out cqe handling into a dedicated routine

Makes the code slightly more readable.

Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

1 files changed, 30 insertions, 23 deletions

diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 042cfe5ef8e9..26eb1743f8bc 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)