linux-kernel - [PATCH v2 3/6] net-PPP: Deletion of unnecessary checks before the function call "kfree"

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Message-ID: <5480DCEE.4070803@users.sourceforge.net>
Date:	Thu, 04 Dec 2014 23:15:10 +0100
From:	SF Markus Elfring <elfring@...rs.sourceforge.net>
To:	Sergei Shtylyov <sergei.shtylyov@...entembedded.com>,
	Paul Mackerras <paulus@...ba.org>, linux-ppp@...r.kernel.org,
	netdev@...r.kernel.org, Eric Dumazet <eric.dumazet@...il.com>
CC:	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH v2 3/6] net-PPP: Deletion of unnecessary checks before the
 function call "kfree"

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Thu, 4 Dec 2014 22:22:23 +0100

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/net/ppp/ppp_mppe.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ppp/ppp_mppe.c b/drivers/net/ppp/ppp_mppe.c
index b80af29..94ff216 100644
--- a/drivers/net/ppp/ppp_mppe.c
+++ b/drivers/net/ppp/ppp_mppe.c
@@ -237,8 +237,7 @@ static void *mppe_alloc(unsigned char *options, int optlen)
 	return (void *)state;
 
 out_free:
-	if (state->sha1_digest)
-		kfree(state->sha1_digest);
+	kfree(state->sha1_digest);
 	if (state->sha1)
 		crypto_free_hash(state->sha1);
 	if (state->arc4)
@@ -255,8 +254,7 @@ static void mppe_free(void *arg)
 {
 	struct ppp_mppe_state *state = (struct ppp_mppe_state *) arg;
 	if (state) {
-		if (state->sha1_digest)
-			kfree(state->sha1_digest);
+		kfree(state->sha1_digest);
 		if (state->sha1)
 			crypto_free_hash(state->sha1);
 		if (state->arc4)
-- 
2.1.3

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