linux-kernel - [PATCH 06/15] hisi_sas: disable dlvry queues once at reset for v2 hw

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Date:   Tue, 6 Sep 2016 23:36:16 +0800
From:   John Garry <john.garry@...wei.com>
To:     <jejb@...ux.vnet.ibm.com>, <martin.petersen@...cle.com>
CC:     <linuxarm@...wei.com>, <zhangfei.gao@...aro.org>,
        <xuwei5@...ilicon.com>, <john.garry2@...l.dcu.ie>,
        <linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        John Garry <john.garry@...wei.com>
Subject: [PATCH 06/15] hisi_sas: disable dlvry queues once at reset for v2 hw

The Delivery queue enable register should only be written
to once at reset for v2 hw.

Signed-off-by: John Garry <john.garry@...wei.com>
---
 drivers/scsi/hisi_sas/hisi_sas_v2_hw.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
index 25e7c58..aca2b80 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
@@ -685,9 +685,7 @@ static int reset_hw_v2_hw(struct hisi_hba *hisi_hba)
 	else
 		reset_val = 0x7ffff;
 
-	/* Disable all of the DQ */
-	for (i = 0; i < HISI_SAS_MAX_QUEUES; i++)
-		hisi_sas_write32(hisi_hba, DLVRY_QUEUE_ENABLE, 0);
+	hisi_sas_write32(hisi_hba, DLVRY_QUEUE_ENABLE, 0);
 
 	/* Disable all of the PHYs */
 	for (i = 0; i < hisi_hba->n_phy; i++) {
-- 
1.9.1