From: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Date: Thu, 20 May 2010 21:34:47 +0000 (-0700)
Subject: ath9k: Fix bug in accessing skb->data of rx frame for edma
X-Git-Tag: v3.12-rc1~9497^2~107^2~416
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5c6dd921776946d12cbbae8ab92c5d6773b25810;p=kernel%2Fkernel-generic.git

ath9k: Fix bug in accessing skb->data of rx frame for edma

Skip the rx status portion in skb->data before accessing ieee80211
frame header.

Signed-off-by: Vasanthakumar Thiagarajan <vasanth@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
---

diff --git a/drivers/net/wireless/ath/ath9k/recv.c b/drivers/net/wireless/ath/ath9k/recv.c
index 3563e44..978b4d9 100644
--- a/drivers/net/wireless/ath/ath9k/recv.c
+++ b/drivers/net/wireless/ath/ath9k/recv.c
@@ -1094,6 +1094,7 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush, bool hp)
 	enum ath9k_rx_qtype qtype;
 	bool edma = !!(ah->caps.hw_caps & ATH9K_HW_CAP_EDMA);
 	int dma_type;
+	u8 rx_status_len = ah->caps.rx_status_len;
 
 	if (edma)
 		dma_type = DMA_BIDIRECTIONAL;
@@ -1121,7 +1122,7 @@ int ath_rx_tasklet(struct ath_softc *sc, int flush, bool hp)
 		if (!skb)
 			continue;
 
-		hdr = (struct ieee80211_hdr *) skb->data;
+		hdr = (struct ieee80211_hdr *) (skb->data + rx_status_len);
 		rxs =  IEEE80211_SKB_RXCB(skb);
 
 		hw = ath_get_virt_hw(sc, hdr);