From: Felix Fietkau <nbd@openwrt.org>
Date: Sun, 4 Apr 2010 17:43:13 +0000 (+0000)
Subject: ixp4xx: add back the patch for avoiding dma bounce buffers for network buffers, which... 
X-Git-Tag: reboot~20318
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=ddb677e13ded19544da207599bc36a6f6b2de98a;p=openwrt%2Fopenwrt.git

ixp4xx: add back the patch for avoiding dma bounce buffers for network buffers, which was lost on the kernel upgrade to 2.6.32. fixes ath9k and improves other drivers' performance on boards with >64M ram

SVN-Revision: 20708
---

diff --git a/target/linux/ixp4xx/patches-2.6.32/600-skb_avoid_dmabounce.patch b/target/linux/ixp4xx/patches-2.6.32/600-skb_avoid_dmabounce.patch
new file mode 100644
index 0000000000..21be8284e6
--- /dev/null
+++ b/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);