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>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/net/wireless/ath9k/main.c b/drivers/net/wireless/ath9k/main.c
index 4bc43db9ab22..7d9c060704b6 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);