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    Subject[27/74] ath9k: fix a chip wakeup related crash in ath9k_start
    2.6.32-longterm review patch.  If anyone has any objections, please let us know.

    ------------------

    From: Felix Fietkau <nbd@openwrt.org>

    commit f62d816fc4324afbb7cf90110c70b6a14139b225 upstream.

    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 <nbd@openwrt.org>
    Signed-off-by: John W. Linville <linville@tuxdriver.com>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

    ---
    drivers/net/wireless/ath/ath9k/main.c | 4 ++++
    1 file changed, 4 insertions(+)

    --- a/drivers/net/wireless/ath/ath9k/main.c
    +++ b/drivers/net/wireless/ath/ath9k/main.c
    @@ -1918,6 +1918,8 @@ static int ath9k_start(struct ieee80211_
    DPRINTF(sc, ATH_DBG_CONFIG, "Starting driver with "
    "initial channel: %d MHz\n", curchan->center_freq);

    + ath9k_ps_wakeup(sc);
    +
    mutex_lock(&sc->mutex);

    if (ath9k_wiphy_started(sc)) {
    @@ -2025,6 +2027,8 @@ static int ath9k_start(struct ieee80211_
    mutex_unlock:
    mutex_unlock(&sc->mutex);

    + ath9k_ps_restore(sc);
    +
    return r;
    }




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