From: Jon Derrick <jonathan.derrick@intel.com>
Date: Tue, 8 Mar 2016 17:34:54 +0000 (-0700)
Subject: NVMe: Remove unused sq_head read in completion path
X-Git-Tag: v4.1.12-102.0.20170601_1400~109
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=4f3b23d1b8a4f93b11cf237129cea0dea32247cf;p=users%2Fjedix%2Flinux-maple.git

NVMe: Remove unused sq_head read in completion path

Signed-off-by: Jon Derrick <jonathan.derrick@intel.com>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
(cherry picked from commit 48c7823f42da2bc881ae2e325ed40123871c2fb9)

Orabug: 25130845

Signed-off-by: Ashok Vairavan <ashok.vairavan@oracle.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
---

diff --git a/drivers/nvme/host/pci.c b/drivers/nvme/host/pci.c
index 29b14da99363..e53b63a1b86e 100644
--- a/drivers/nvme/host/pci.c
+++ b/drivers/nvme/host/pci.c
@@ -147,7 +147,6 @@ struct nvme_queue {
 	u32 __iomem *q_db;
 	u16 q_depth;
 	s16 cq_vector;
-	u16 sq_head;
 	u16 sq_tail;
 	u16 cq_head;
 	u16 qid;
@@ -803,7 +802,6 @@ static int nvme_process_cq(struct nvme_queue *nvmeq)
 
 		if ((status & 1) != phase)
 			break;
-		nvmeq->sq_head = le16_to_cpu(cqe.sq_head);
 		if (++head == nvmeq->q_depth) {
 			head = 0;
 			phase = !phase;