From: Felix Fietkau <nbd@openwrt.org>
Date: Tue, 24 Nov 2009 13:55:37 +0000 (+0000)
Subject: ath: only use GFP_DMA on ixp4xx
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=cafe76e10361d2ca31edfb2017378b92c6e3b5b8;p=openwrt%2Fstaging%2Faparcar.git

ath: only use GFP_DMA on ixp4xx

SVN-Revision: 18525
---

diff --git a/package/mac80211/patches/510-ath_use_gfp_dma.patch b/package/mac80211/patches/510-ath_use_gfp_dma.patch
index af375b151b..9390a2faaa 100644
--- a/package/mac80211/patches/510-ath_use_gfp_dma.patch
+++ b/package/mac80211/patches/510-ath_use_gfp_dma.patch
@@ -1,11 +1,17 @@
 --- a/drivers/net/wireless/ath/main.c
 +++ b/drivers/net/wireless/ath/main.c
-@@ -43,7 +43,7 @@ struct sk_buff *ath_rxbuf_alloc(struct a
- 	 * Unfortunately this means we may get 8 KB here from the
- 	 * kernel... and that is actually what is observed on some
- 	 * systems :( */
--	skb = __dev_alloc_skb(len + common->cachelsz - 1, gfp_mask);
-+	skb = __dev_alloc_skb(len + common->cachelsz - 1, gfp_mask | GFP_DMA);
- 	if (skb != NULL) {
- 		off = ((unsigned long) skb->data) % common->cachelsz;
- 		if (off != 0)
+@@ -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.