From: Xiang Chen <chenxiang66@hisilicon.com>
Date: Fri, 8 Dec 2017 17:16:32 +0000 (+0800)
Subject: scsi: hisi_sas: initialize dq spinlock before use
X-Git-Tag: v4.16-rc1~140^2~204
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=39bade0c9fb11e04945a5749e01e65a376e4eb02;p=linux.git

scsi: hisi_sas: initialize dq spinlock before use

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>
---

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;