From: Luis R. Rodriguez <lrodriguez@atheros.com>
Date: Sat, 28 Mar 2009 01:45:02 +0000 (+0000)
Subject: ath9k: fix dma mapping leak of rx buffer upon rmmod
X-Git-Tag: v2.6.29.1~29
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=fb2d617e4b8ac0a2c07643a3a6299409692f8003;p=thirdparty%2Fkernel%2Fstable.git

ath9k: fix dma mapping leak of rx buffer upon rmmod

upstream commit: 051b919188650fe4c93ca8701183ae88439388f6

We were claiming DMA buffers on the RX tasklet but never
upon a simple module removal.

Cc: stable@kernel.org
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Luis R. Rodriguez <lrodriguez@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
[chrisw: backport to 2.6.29]
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
---

diff --git a/drivers/net/wireless/ath9k/recv.c b/drivers/net/wireless/ath9k/recv.c
index 462e08c3d09dc..c114cb7c24061 100644
--- a/drivers/net/wireless/ath9k/recv.c
+++ b/drivers/net/wireless/ath9k/recv.c
@@ -322,8 +322,13 @@ void ath_rx_cleanup(struct ath_softc *sc)
 
 	list_for_each_entry(bf, &sc->rx.rxbuf, list) {
 		skb = bf->bf_mpdu;
-		if (skb)
+		if (skb) {
+			pci_unmap_single(sc->pdev,
+					 bf->bf_buf_addr,
+					 sc->rx.bufsize,
+					 DMA_FROM_DEVICE);
 			dev_kfree_skb(skb);
+		}
 	}
 
 	if (sc->rx.rxdma.dd_desc_len != 0)