NVMe: Remove unused sq_head read in completion path

Jon Derrick · axboe · commit 48c7823f42da · 2016-03-08T15:01:06.000-07:00
Signed-off-by: Jon Derrick &lt;jonathan.derrick@intel.com&gt;
Reviewed-by: Sagi Grimberg &lt;sagig@mellanox.com&gt;
Signed-off-by: Jens Axboe &lt;axboe@fb.com&gt;
diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
@@ -134,7 +134,6 @@ struct nvme_queue {
 	u32 __iomem *q_db;
 	u16 q_depth;
 	s16 cq_vector;
-	u16 sq_head;
 	u16 sq_tail;
 	u16 cq_head;
 	u16 qid;
@@ -719,7 +718,6 @@ static void __nvme_process_cq(struct nvme_queue *nvmeq, unsigned int *tag)
 
 		if ((status & 1) != phase)
 			break;
-		nvmeq->sq_head = le16_to_cpu(cqe.sq_head);
 		if (++head == nvmeq->q_depth) {
 			head = 0;
 			phase = !phase;
