From: Quinn Tran <quinn.tran@qlogic.com>
Date: Wed, 10 Jun 2015 15:05:19 +0000 (-0400)
Subject: qla2xxx: Add flush after updating ATIOQ consumer index.
X-Git-Tag: v4.1.12-117.0_27200813_3~108
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=933927d5e36f100d18a42de56db45f178adf708a;p=users%2Fjedix%2Flinux-maple.git

qla2xxx: Add flush after updating ATIOQ consumer index.

Orabug: 26844197, 26923029

After updating the consumer index of ATIO Q, a read is
required to flush the write to the adapter register.

Signed-off-by: Quinn Tran <quinn.tran@qlogic.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@qlogic.com>
Reviewed-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Brian Maly <brian.maly@oracle.com>
Reviewed-by: Jack Vogel <jack.vogel@oracle.com>
---

diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c
index c0d68b916939..eba256013007 100644
--- a/drivers/scsi/qla2xxx/qla_target.c
+++ b/drivers/scsi/qla2xxx/qla_target.c
@@ -5568,6 +5568,7 @@ qlt_24xx_process_atio_queue(struct scsi_qla_host *vha)
 
 	/* Adjust ring index */
 	WRT_REG_DWORD(ISP_ATIO_Q_OUT(vha), ha->tgt.atio_ring_index);
+	RD_REG_DWORD_RELAXED(ISP_ATIO_Q_OUT(vha));
 }
 
 void