[PATCH] drivers cris: return on NULL dev_alloc_skb()

If the next descriptor array entry cannot be allocated by dev_alloc_skb(),
return immediately so it is not dereferenced later. We cannot register the
device with a partial descriptor list.

Cc: Mikael Starvik <[e-mail]>
Signed-off-by: David Rientjes <[e-mail]>
Cc: Jeff Garzik <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Jeff Garzik <[e-mail]>

drivers/net/cris/eth_v10.c

···
 		 * does not share cacheline with any other data (to avoid cache bug)
 		 */
 		RxDescList[i].skb = dev_alloc_skb(MAX_MEDIA_DATA_SIZE + 2 * L1_CACHE_BYTES);
+		if (!RxDescList[i].skb)
+			return -ENOMEM;
 		RxDescList[i].descr.ctrl   = 0;
 		RxDescList[i].descr.sw_len = MAX_MEDIA_DATA_SIZE;
 		RxDescList[i].descr.next   = virt_to_phys(&RxDescList[i + 1]);