commit: f62d816fc4324afbb7cf90110c70b6a14139b225
From: Felix Fietkau <[email protected]>
Date: Fri, 25 Mar 2011 17:43:41 +0100
Subject: [PATCH] ath9k: fix a chip wakeup related crash in ath9k_start

When the chip is still asleep when ath9k_start is called,
ath9k_hw_configpcipowersave can trigger a data bus error.

Signed-off-by: Felix Fietkau <[email protected]>
Cc: [email protected]
Signed-off-by: John W. Linville <[email protected]>
---
 drivers/net/wireless/ath/ath9k/main.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/drivers/net/wireless/ath/ath9k/main.c 
b/drivers/net/wireless/ath/ath9k/main.c
index 5248257..dddb85d 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -1048,6 +1048,8 @@ static int ath9k_start(struct ieee80211_hw *hw)
                "Starting driver with initial channel: %d MHz\n",
                curchan->center_freq);
 
+       ath9k_ps_wakeup(sc);
+
        mutex_lock(&sc->mutex);
 
        /* setup initial channel */
@@ -1143,6 +1145,8 @@ static int ath9k_start(struct ieee80211_hw *hw)
 mutex_unlock:
        mutex_unlock(&sc->mutex);
 
+       ath9k_ps_restore(sc);
+
        return r;
 }
 

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