linux-kernel - [PATCH 4.15 38/52] scsi: qla2xxx: Fix smatch warning in qla25xx_delete_{rsp|req}

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Date:   Mon, 19 Mar 2018 19:08:36 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dan Carpenter <dan.carpenter@...cle.com>,
        Himanshu Madhani <himanshu.madhani@...ium.com>,
        "Martin K. Petersen" <martin.petersen@...cle.com>
Subject: [PATCH 4.15 38/52] scsi: qla2xxx: Fix smatch warning in qla25xx_delete_{rsp|req}_que

4.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Himanshu Madhani <himanshu.madhani@...ium.com>

commit 62aa281470fdb7c0796d63a1cc918a8c1f02dde2 upstream.

This patch fixes following warnings reported by smatch:

drivers/scsi/qla2xxx/qla_mid.c:586 qla25xx_delete_req_que()
error: we previously assumed 'req' could be null (see line 580)

drivers/scsi/qla2xxx/qla_mid.c:602 qla25xx_delete_rsp_que()
error: we previously assumed 'rsp' could be null (see line 596)

Fixes: 7867b98dceb7 ("scsi: qla2xxx: Fix memory leak in dual/target mode")
Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Himanshu Madhani <himanshu.madhani@...ium.com>
Signed-off-by: Martin K. Petersen <martin.petersen@...cle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/scsi/qla2xxx/qla_mid.c |    6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

--- a/drivers/scsi/qla2xxx/qla_mid.c
+++ b/drivers/scsi/qla2xxx/qla_mid.c
@@ -582,8 +582,9 @@ qla25xx_delete_req_que(struct scsi_qla_h
 		ret = qla25xx_init_req_que(vha, req);
 		if (ret != QLA_SUCCESS)
 			return QLA_FUNCTION_FAILED;
+
+		qla25xx_free_req_que(vha, req);
 	}
-	qla25xx_free_req_que(vha, req);
 
 	return ret;
 }
@@ -598,8 +599,9 @@ qla25xx_delete_rsp_que(struct scsi_qla_h
 		ret = qla25xx_init_rsp_que(vha, rsp);
 		if (ret != QLA_SUCCESS)
 			return QLA_FUNCTION_FAILED;
+
+		qla25xx_free_rsp_que(vha, rsp);
 	}
-	qla25xx_free_rsp_que(vha, rsp);
 
 	return ret;
 }