linux-kernel - [PATCH] [SCSI] megaraid_sas: Fix mismatch in megasas_reset

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Message-Id: <1314218365-12295-1-git-send-email-khoroshilov@ispras.ru>
Date:	Thu, 25 Aug 2011 00:39:25 +0400
From:	Alexey Khoroshilov <khoroshilov@...ras.ru>
To:	Neela Syam Kolli <megaraidlinux@....com>
Cc:	Alexey Khoroshilov <khoroshilov@...ras.ru>,
	"James E.J. Bottomley" <JBottomley@...allels.com>,
	linux-scsi@...r.kernel.org, linux-kernel@...r.kernel.org,
	ldv-project@...ras.ru
Subject: [PATCH] [SCSI] megaraid_sas: Fix mismatch in megasas_reset_fusion mutex lock-unlock

In case of MEGASAS_HW_CRITICAL_ERROR goto out is invalid since
we have not locked mutex and have not set MEGASAS_FUSION_IN_RESET bit yet.
The patch replaces goto by immediate return.

Found by Linux Driver Verification project (linuxtesting.org).

Signed-off-by: Alexey Khoroshilov <khoroshilov@...ras.ru>
---
 drivers/scsi/megaraid/megaraid_sas_fusion.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/drivers/scsi/megaraid/megaraid_sas_fusion.c b/drivers/scsi/megaraid/megaraid_sas_fusion.c
index f13e7ab..8b59fb9 100644
--- a/drivers/scsi/megaraid/megaraid_sas_fusion.c
+++ b/drivers/scsi/megaraid/megaraid_sas_fusion.c
@@ -2057,8 +2057,7 @@ int megasas_reset_fusion(struct Scsi_Host *shost)
 	if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
 		printk(KERN_WARNING "megaraid_sas: Hardware critical error, "
 		       "returning FAILED.\n");
-		retval = FAILED;
-		goto out;
+		return FAILED;
 	}
 
 	mutex_lock(&instance->reset_mutex);
-- 
1.7.4.1

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