From: Shreyas Deodhar <sdeodhar@marvell.com>
Date: Wed, 8 Sep 2021 09:46:19 -0700
Subject: scsi: qla2xxx: Call process_response_queue() in Tx path
Patch-mainline: v5.16-rc1
Git-commit: 38c61709e66294f33e474eaafd6ae3be381030da
References: bsc#1190941

Process responses in Tx path if any available for better performance.

Link: https://lore.kernel.org/r/20210908164622.19240-8-njavali@marvell.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Shreyas Deodhar <sdeodhar@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Daniel Wagner <dwagner@suse.de>
---
 drivers/scsi/qla2xxx/qla_nvme.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/drivers/scsi/qla2xxx/qla_nvme.c
+++ b/drivers/scsi/qla2xxx/qla_nvme.c
@@ -401,6 +401,7 @@ static inline int qla2x00_start_nvme_mq(
 	uint16_t	avail_dsds;
 	struct dsd64	*cur_dsd;
 	struct req_que *req = NULL;
+	struct rsp_que *rsp = NULL;
 	struct scsi_qla_host *vha = sp->fcport->vha;
 	struct qla_hw_data *ha = vha->hw;
 	struct qla_qpair *qpair = sp->qpair;
@@ -412,6 +413,7 @@ static inline int qla2x00_start_nvme_mq(
 
 	/* Setup qpair pointers */
 	req = qpair->req;
+	rsp = qpair->rsp;
 	tot_dsds = fd->sg_cnt;
 
 	/* Acquire qpair specific lock */
@@ -573,6 +575,10 @@ static inline int qla2x00_start_nvme_mq(
 	/* Set chip new ring index. */
 	wrt_reg_dword(req->req_q_in, req->ring_index);
 
+	if (vha->flags.process_response_queue &&
+	    rsp->ring_ptr->signature != RESPONSE_PROCESSED)
+		qla24xx_process_response_queue(vha, rsp);
+
 queuing_error:
 	spin_unlock_irqrestore(&qpair->qp_lock, flags);