netdev - [patch -next] ax25: remove unneeded NULL test in ax

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Message-ID: <20150305174846.GA17072@mwanda>
Date:	Thu, 5 Mar 2015 20:48:46 +0300
From:	Dan Carpenter <dan.carpenter@...cle.com>
To:	"David S. Miller" <davem@...emloft.net>
Cc:	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Tom Gundersen <teg@...m.no>,
	David Herrmann <dh.herrmann@...il.com>, netdev@...r.kernel.org,
	kernel-janitors@...r.kernel.org
Subject: [patch -next] ax25: remove unneeded NULL test in ax_xmit()

We get a static checker warning here on devel kernels:

	drivers/net/hamradio/mkiss.c:560 ax_xmit()
	warn: variable dereferenced before check 'skb' (see line 532)

It turns out that the NULL check can be deleted.

Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>

diff --git a/drivers/net/hamradio/mkiss.c b/drivers/net/hamradio/mkiss.c
index 17058c4..2ffbf13 100644
--- a/drivers/net/hamradio/mkiss.c
+++ b/drivers/net/hamradio/mkiss.c
@@ -557,11 +557,9 @@ static netdev_tx_t ax_xmit(struct sk_buff *skb, struct net_device *dev)
 	}
 
 	/* We were not busy, so we are now... :-) */
-	if (skb != NULL) {
-		netif_stop_queue(dev);
-		ax_encaps(dev, skb->data, skb->len);
-		kfree_skb(skb);
-	}
+	netif_stop_queue(dev);
+	ax_encaps(dev, skb->data, skb->len);
+	kfree_skb(skb);
 
 	return NETDEV_TX_OK;
 }
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