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-rw-r--r--package/kernel/mac80211/patches/309-ath9k-prevent-early-IRQs-from-accessing-hardware.patch38
1 files changed, 38 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/309-ath9k-prevent-early-IRQs-from-accessing-hardware.patch b/package/kernel/mac80211/patches/309-ath9k-prevent-early-IRQs-from-accessing-hardware.patch
new file mode 100644
index 0000000000..6af94c8ea6
--- /dev/null
+++ b/package/kernel/mac80211/patches/309-ath9k-prevent-early-IRQs-from-accessing-hardware.patch
@@ -0,0 +1,38 @@
+From: Felix Fietkau <nbd@openwrt.org>
+Date: Thu, 13 Nov 2014 18:27:47 +0100
+Subject: [PATCH] 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>
+---
+
+--- a/drivers/net/wireless/ath/ath9k/init.c
++++ b/drivers/net/wireless/ath/ath9k/init.c
+@@ -513,10 +513,14 @@ static int ath9k_init_softc(u16 devid, s
+ 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);
+@@ -876,9 +880,6 @@ int ath9k_init_device(u16 devid, struct
+ 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);