mac802154: fix memory leaks

kfree_skb() was not getting called in the case of some failures.
This was pointed out by Eric Dumazet.

Signed-off-by: Alan Ott <alan@signal11.us>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/mac802154/tx.c

diff --git a/net/mac802154/tx.c b/net/mac802154/tx.c
index 1a4df39..db63914 100644
--- a/net/mac802154/tx.c
+++ b/net/mac802154/tx.c
@@ -85,6 +85,7 @@
 
 	if (!(priv->phy->channels_supported[page] & (1 << chan))) {
 		WARN_ON(1);
+		kfree_skb(skb);
 		return NETDEV_TX_OK;
 	}
 
@@ -103,8 +104,10 @@
 	}
 
 	work = kzalloc(sizeof(struct xmit_work), GFP_ATOMIC);
-	if (!work)
+	if (!work) {
+		kfree_skb(skb);
 		return NETDEV_TX_BUSY;
+	}
 
 	INIT_WORK(&work->work, mac802154_xmit_worker);
 	work->skb = skb;

net/mac802154/wpan.c

diff --git a/net/mac802154/wpan.c b/net/mac802154/wpan.c
index f30f6d4..1191039 100644
--- a/net/mac802154/wpan.c
+++ b/net/mac802154/wpan.c
@@ -327,8 +327,10 @@
 
 	if (chan == MAC802154_CHAN_NONE ||
 	    page >= WPAN_NUM_PAGES ||
-	    chan >= WPAN_NUM_CHANNELS)
+	    chan >= WPAN_NUM_CHANNELS) {
+		kfree_skb(skb);
 		return NETDEV_TX_OK;
+	}
 
 	skb->skb_iif = dev->ifindex;
 	dev->stats.tx_packets++;