linux-kernel - [PATCH v2 1/3] xen-scsiback: Delete an unnecessary check before the function call "kfree"

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Date:	Wed, 20 Jul 2016 13:30:50 +0200
From:	SF Markus Elfring <elfring@...rs.sourceforge.net>
To:	xen-devel@...ts.xenproject.org, linux-scsi@...r.kernel.org,
	Jürgen Groß <jgross@...e.com>,
	David Vrabel <david.vrabel@...rix.com>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH v2 1/3] xen-scsiback: Delete an unnecessary check before the
 function call "kfree"

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Tue, 19 Jul 2016 15:42:19 +0200

The kfree() function tests whether its argument is NULL and then
returns immediately. Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
v2: Rebased on source files from "Linux next-20160719"

 drivers/xen/xen-scsiback.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/xen/xen-scsiback.c b/drivers/xen/xen-scsiback.c
index d6950e0..4a48c06 100644
--- a/drivers/xen/xen-scsiback.c
+++ b/drivers/xen/xen-scsiback.c
@@ -627,8 +627,7 @@ static void scsiback_device_action(struct vscsibk_pend *pending_req,
 	transport_generic_free_cmd(&pending_req->se_cmd, 1);
 	return;
 err:
-	if (tmr)
-		kfree(tmr);
+	kfree(tmr);
 	scsiback_do_resp_with_sense(NULL, err, 0, pending_req);
 }
 
-- 
2.9.2