[IRDA] via-ircc: fix memory leak

Fix memory leak.

Coverity id# 653

patch location:
http://www.kernel.org/git/?p=linux/kernel/git/bcollins/ubuntu-dapper.git;a=commitdiff;h=a1f34cb68b16807ed9d5ebb0f6a6ec5ff8a5fc78Signed-off-by: NChuck Short <zulcss@gmail.com>
Signed-off-by: NBen Collins <bcollins@ubuntu.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/irda/via-ircc.c

@@ -1223,8 +1223,13 @@ static int upload_rxdata(struct via_ircc_cb *self, int iobase)
 
 	IRDA_DEBUG(2, "%s(): len=%x\n", __FUNCTION__, len);
 
+	if ((len - 4) < 2) {
+		self->stats.rx_dropped++;
+		return FALSE;
+	}
+
 	skb = dev_alloc_skb(len + 1);
-	if ((skb == NULL) || ((len - 4) < 2)) {
+	if (skb == NULL) {
 		self->stats.rx_dropped++;
 		return FALSE;
 	}