linux-kernel - [PATCH -next] scsi: Remove ignoring unreachable code warning

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Message-Id: <20220301080448.112813-1-yang.lee@linux.alibaba.com>
Date:   Tue,  1 Mar 2022 16:04:48 +0800
From:   Yang Li <yang.lee@...ux.alibaba.com>
To:     jejb@...ux.ibm.com
Cc:     martin.petersen@...cle.com, linux-scsi@...r.kernel.org,
        linux-kernel@...r.kernel.org, Yang Li <yang.lee@...ux.alibaba.com>,
        Abaci Robot <abaci@...ux.alibaba.com>
Subject: [PATCH -next] scsi: Remove ignoring unreachable code warning

The smatch tool reported the following warning:
drivers/scsi/scsi_error.c:1988 scsi_decide_disposition() warn: ignoring
unreachable code.

Remove the "default:return FAILED;" instead of "return FAILED;" reported
by smatch, because compilers can provide more useful diagnostics about
switch/case statements that do not have a default statement, especially
if the "switch" applies to a value with enumeration type.

Reported-by: Abaci Robot <abaci@...ux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@...ux.alibaba.com>
---
 drivers/scsi/scsi_error.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/scsi/scsi_error.c b/drivers/scsi/scsi_error.c
index 9c237b223e63..ee752b4512f8 100644
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -1982,8 +1982,6 @@ enum scsi_disposition scsi_decide_disposition(struct scsi_cmnd *scmd)
 			    "reservation conflict\n");
 		set_host_byte(scmd, DID_NEXUS_FAILURE);
 		return SUCCESS; /* causes immediate i/o error */
-	default:
-		return FAILED;
 	}
 	return FAILED;
 
-- 
2.20.1.7.g153144c