linux-kernel - [PATCH] coresight: tmc: Delete an unnecessary check before the function call "kfree"

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Date:	Sat, 23 Jul 2016 20:08:38 +0200
From:	SF Markus Elfring <elfring@...rs.sourceforge.net>
To:	linux-arm-kernel@...ts.infradead.org,
	Mathieu Poirier <mathieu.poirier@...aro.org>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH] coresight: tmc: Delete an unnecessary check before the
 function call "kfree"

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Sat, 23 Jul 2016 20:04:09 +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>
---
 drivers/hwtracing/coresight/coresight-tmc-etf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hwtracing/coresight/coresight-tmc-etf.c b/drivers/hwtracing/coresight/coresight-tmc-etf.c
index e68289b..5fa49c4 100644
--- a/drivers/hwtracing/coresight/coresight-tmc-etf.c
+++ b/drivers/hwtracing/coresight/coresight-tmc-etf.c
@@ -168,7 +168,7 @@ out:
 	spin_unlock_irqrestore(&drvdata->spinlock, flags);
 
 	/* Free memory outside the spinlock if need be */
-	if (!used && buf)
+	if (!used)
 		kfree(buf);
 
 	if (!ret)
-- 
2.9.2