From: Xiang Chen <chenxiang66@hisilicon.com>
Date: Sat, 9 Dec 2017 01:16:32 +0800
Subject: scsi: hisi_sas: initialize dq spinlock before use
Git-commit: 39bade0c9fb11e04945a5749e01e65a376e4eb02
Patch-mainline: v4.16-rc1
References: FATE#326253

It is required to initialize the dq spinlock before use, which was not being
done, so fix it. This issue can be detected when CONFIG_DEBUG_SPINLOCK is
enabled.

Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Acked-by: Johannes Thumshirn <jthumshirn@suse.de>
---
 drivers/scsi/hisi_sas/hisi_sas_main.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c
index 5f503cb09508..359ec52fc2fb 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_main.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_main.c
@@ -1657,6 +1657,7 @@ int hisi_sas_alloc(struct hisi_hba *hisi_hba, struct Scsi_Host *shost)
 		cq->hisi_hba = hisi_hba;
 
 		/* Delivery queue structure */
+		spin_lock_init(&dq->lock);
 		dq->id = i;
 		dq->hisi_hba = hisi_hba;