ath9k: prevent early IRQs from accessing hardware

IRQs are suppressed if ah == NULL and ATH_OP_INVALID being set in
common->op_flags. Close a short time window between those two.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath/ath9k/init.c b/drivers/net/wireless/ath/ath9k/init.c
index 59d679c..d1c3934 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/init.c
+++ b/drivers/net/wireless/ath/ath9k/init.c
@@ -532,10 +532,14 @@ static int ath9k_init_softc(u16 devid, struct ath_softc *sc,
        ah->reg_ops.read = ath9k_ioread32;
        ah->reg_ops.write = ath9k_iowrite32;
        ah->reg_ops.rmw = ath9k_reg_rmw;
-       sc->sc_ah = ah;
        pCap = &ah->caps;
 
        common = ath9k_hw_common(ah);
+
+       /* Will be cleared in ath9k_start() */
+       set_bit(ATH_OP_INVALID, &common->op_flags);
+
+       sc->sc_ah = ah;
        sc->dfs_detector = dfs_pattern_detector_init(common, NL80211_DFS_UNSET);
        sc->tx99_power = MAX_RATE_POWER + 1;
        init_waitqueue_head(&sc->tx_wait);
@@ -896,9 +900,6 @@ int ath9k_init_device(u16 devid, struct ath_softc *sc,
        common = ath9k_hw_common(ah);
        ath9k_set_hw_capab(sc, hw);
 
-       /* Will be cleared in ath9k_start() */
-       set_bit(ATH_OP_INVALID, &common->op_flags);
-
        /* Initialize regulatory */
        error = ath_regd_init(&common->regulatory, sc->hw->wiphy,
                              ath9k_reg_notifier);