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authorSujith <Sujith.Manoharan@atheros.com>2008-12-18 11:40:16 +0530
committerJohn W. Linville <linville@tuxdriver.com>2008-12-19 15:23:50 -0500
commitaa33de09a849bd65b1201e1aec42e3e412c14cf6 (patch)
treeb3149a22e5fe928feba7eee35d54dd405252c7b2 /drivers/net/wireless
parent5e3f308997f53d00e8cbebdb89d4f6e347aa963a (diff)
ath9k: Protect config() callback with a mutex
This should fix the timeout issues seen when using wpa_supplicant. Signed-off-by: Sujith <Sujith.Manoharan@atheros.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers/net/wireless')
-rw-r--r--drivers/net/wireless/ath9k/core.h1
-rw-r--r--drivers/net/wireless/ath9k/main.c5
2 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath9k/core.h b/drivers/net/wireless/ath9k/core.h
index e38f0331cfd..4ca2aed236e 100644
--- a/drivers/net/wireless/ath9k/core.h
+++ b/drivers/net/wireless/ath9k/core.h
@@ -701,6 +701,7 @@ struct ath_softc {
struct ath_hal *sc_ah;
void __iomem *mem;
spinlock_t sc_resetlock;
+ struct mutex mutex;
u8 sc_curbssid[ETH_ALEN];
u8 sc_myaddr[ETH_ALEN];
diff --git a/drivers/net/wireless/ath9k/main.c b/drivers/net/wireless/ath9k/main.c
index e768be4669e..94c526669a4 100644
--- a/drivers/net/wireless/ath9k/main.c
+++ b/drivers/net/wireless/ath9k/main.c
@@ -1324,6 +1324,7 @@ static int ath_init(u16 devid, struct ath_softc *sc)
printk(KERN_ERR "Unable to create debugfs files\n");
spin_lock_init(&sc->sc_resetlock);
+ mutex_init(&sc->mutex);
tasklet_init(&sc->intr_tq, ath9k_tasklet, (unsigned long)sc);
tasklet_init(&sc->bcon_tasklet, ath9k_beacon_tasklet,
(unsigned long)sc);
@@ -2133,6 +2134,7 @@ static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
struct ath_softc *sc = hw->priv;
struct ieee80211_conf *conf = &hw->conf;
+ mutex_lock(&sc->mutex);
if (changed & (IEEE80211_CONF_CHANGE_CHANNEL |
IEEE80211_CONF_CHANGE_HT)) {
struct ieee80211_channel *curchan = hw->conf.channel;
@@ -2145,6 +2147,7 @@ static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
if (pos == -1) {
DPRINTF(sc, ATH_DBG_FATAL, "Invalid channel: %d\n",
curchan->center_freq);
+ mutex_unlock(&sc->mutex);
return -EINVAL;
}
@@ -2165,6 +2168,7 @@ static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
if (ath_set_channel(sc, &sc->sc_ah->ah_channels[pos]) < 0) {
DPRINTF(sc, ATH_DBG_FATAL, "Unable to set channel\n");
+ mutex_unlock(&sc->mutex);
return -EINVAL;
}
@@ -2174,6 +2178,7 @@ static int ath9k_config(struct ieee80211_hw *hw, u32 changed)
if (changed & IEEE80211_CONF_CHANGE_POWER)
sc->sc_config.txpowlimit = 2 * conf->power_level;
+ mutex_unlock(&sc->mutex);
return 0;
}