[backfire] ixp4xx: backport r20708

git-svn-id: svn://svn.openwrt.org/openwrt/branches/backfire@20709 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/ixp4xx/patches-2.6.32/600-skb_avoid_dmabounce.patch

@@ -0,0 +1,13 @@
+--- a/net/core/skbuff.c
++++ b/net/core/skbuff.c
+@@ -264,6 +264,10 @@ struct sk_buff *__alloc_skb(unsigned int
+ 	if (!skb)
+ 		goto out;
+ 
++#ifdef CONFIG_ARCH_IXP4XX
++	gfp_mask |= GFP_DMA;
++#endif
++
+ 	size = SKB_DATA_ALIGN(size);
+ 	data = kmalloc_node_track_caller(size + sizeof(struct skb_shared_info),
+ 			gfp_mask, node);