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ixp4xx: allocate all skbs using GFP_DMA

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this ensures that dma bounce buffers will not be used frequently when bridging or routing frames between ethernet and wifi.
significantly improves ath9k performance and obsoletes an ath specific patch

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@19051 3c298f89-4303-0410-b956-a3cf2f4a3e73
This commit is contained in:
nbd
2010-01-06 06:05:15 +00:00
parent ae83c51a2e
commit f082d62028
2 changed files with 13 additions and 17 deletions
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17
package/mac80211/patches/500-ath_use_gfp_dma.patch
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@@ -1,17 +0,0 @@
--- a/drivers/net/wireless/ath/main.c
+++ b/drivers/net/wireless/ath/main.c
@@ -31,6 +31,14 @@ struct sk_buff *ath_rxbuf_alloc(struct a
u32 off;
/*
+ * Enable GFP_DMA in order to avoid using DMA bounce buffers
+ * on IXP4xx devices with more than 64M RAM
+ */
+#ifdef CONFIG_ARCH_IXP4XX
+ gfp_mask |= GFP_DMA;
+#endif
+
+ /*
* Cache-line-align. This is important (for the
* 5210 at least) as not doing so causes bogus data
* in rx'd frames.