linux-kernel - [PATCH] WiMAX-i2400m: Delete an unnecessary check before the function call "kfree

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Message-ID: <5649AE81.6070809@users.sourceforge.net>
Date:	Mon, 16 Nov 2015 11:22:57 +0100
From:	SF Markus Elfring <elfring@...rs.sourceforge.net>
To:	Inaky Perez-Gonzalez <inaky.perez-gonzalez@...el.com>,
	linux-wimax@...el.com, netdev@...r.kernel.org
Cc:	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH] WiMAX-i2400m: Delete an unnecessary check before the function
 call "kfree_skb"

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Mon, 16 Nov 2015 11:17:55 +0100

The kfree_skb() 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/wimax/i2400m/control.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/wimax/i2400m/control.c b/drivers/net/wimax/i2400m/control.c
index 4c41790..4de22b7 100644
--- a/drivers/net/wimax/i2400m/control.c
+++ b/drivers/net/wimax/i2400m/control.c
@@ -644,7 +644,7 @@ void i2400m_msg_to_dev_cancel_wait(struct i2400m *i2400m, int code)
 
 	spin_lock_irqsave(&i2400m->rx_lock, flags);
 	ack_skb = i2400m->ack_skb;
-	if (ack_skb && !IS_ERR(ack_skb))
+	if (!IS_ERR(ack_skb))
 		kfree_skb(ack_skb);
 	i2400m->ack_skb = ERR_PTR(code);
 	spin_unlock_irqrestore(&i2400m->rx_lock, flags);
-- 
2.6.2

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