From b03a9db95a285e13a5e4f2913e9d22a84bf50cc6 Mon Sep 17 00:00:00 2001
From: Senthil Balasubramanian <senthilkumar@atheros.com>
Date: Fri, 6 Mar 2009 11:24:09 +0530
Subject: ath9k: RX buffers may be accessed/freed even before
 initialized/alloced.

accessing RXBUF list in ath_rx_cleanup may cause panic if
ath_descdma_setup fails even before RXBUF list is initialized.

Signed-off-by: Senthil Balasubramanian <senthilkumar@atheros.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath9k/main.c b/drivers/net/wireless/ath9k/main.c
index 4bc43db..7d9c060 100644
--- a/drivers/net/wireless/ath9k/main.c
+++ b/drivers/net/wireless/ath9k/main.c
@@ -1773,6 +1773,7 @@ int ath_descdma_setup(struct ath_softc *sc, struct ath_descdma *dd,
 	DPRINTF(sc, ATH_DBG_CONFIG, "%s DMA: %u buffers %u desc/buf\n",
 		name, nbuf, ndesc);
 
+	INIT_LIST_HEAD(head);
 	/* ath_desc must be a multiple of DWORDs */
 	if ((sizeof(struct ath_desc) % 4) != 0) {
 		DPRINTF(sc, ATH_DBG_FATAL, "ath_desc not DWORD aligned\n");
@@ -1823,7 +1824,6 @@ int ath_descdma_setup(struct ath_softc *sc, struct ath_descdma *dd,
 	}
 	dd->dd_bufptr = bf;
 
-	INIT_LIST_HEAD(head);
 	for (i = 0; i < nbuf; i++, bf++, ds += ndesc) {
 		bf->bf_desc = ds;
 		bf->bf_daddr = DS2PHYS(dd, ds);
-- 
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