package/kernel/mac80211/patches/309-ath9k-prevent-early-IRQs-from-accessing-hardware.patch

   1 From: Felix Fietkau <nbd@openwrt.org>
   2 Date: Thu, 13 Nov 2014 18:27:47 +0100
   3 Subject: [PATCH] ath9k: prevent early IRQs from accessing hardware
   4
   5 IRQs are suppressed if ah == NULL and ATH_OP_INVALID being set in
   6 common->op_flags. Close a short time window between those two.
   7
   8 Signed-off-by: Felix Fietkau <nbd@openwrt.org>
   9 ---
  10
  11 --- a/drivers/net/wireless/ath/ath9k/init.c
  12 +++ b/drivers/net/wireless/ath/ath9k/init.c
  13 @@ -513,10 +513,14 @@ static int ath9k_init_softc(u16 devid, s
  14         ah->reg_ops.read = ath9k_ioread32;
  15         ah->reg_ops.write = ath9k_iowrite32;
  16         ah->reg_ops.rmw = ath9k_reg_rmw;
  17 -       sc->sc_ah = ah;
  18         pCap = &ah->caps;
  19
  20         common = ath9k_hw_common(ah);
  21 +
  22 +       /* Will be cleared in ath9k_start() */
  23 +       set_bit(ATH_OP_INVALID, &common->op_flags);
  24 +
  25 +       sc->sc_ah = ah;
  26         sc->dfs_detector = dfs_pattern_detector_init(common, NL80211_DFS_UNSET);
  27         sc->tx99_power = MAX_RATE_POWER + 1;
  28         init_waitqueue_head(&sc->tx_wait);
  29 @@ -876,9 +880,6 @@ int ath9k_init_device(u16 devid, struct
  30         common = ath9k_hw_common(ah);
  31         ath9k_set_hw_capab(sc, hw);
  32
  33 -       /* Will be cleared in ath9k_start() */
  34 -       set_bit(ATH_OP_INVALID, &common->op_flags);
  35 -
  36         /* Initialize regulatory */
  37         error = ath_regd_init(&common->regulatory, sc->hw->wiphy,
  38                               ath9k_reg_notifier);