ath9k: fix a scheduling while atomic bug in CSA handling

Commit "ath9k: prepare for multi-interface CSA support" added a call to
ieee80211_iterate_active_interfaces in atomic context (beacon tasklet),
which is crashing.
Use ieee80211_iterate_active_interfaces_atomic instead.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

diff --git a/drivers/net/wireless/ath/ath9k/beacon.c b/drivers/net/wireless/ath/ath9k/beacon.c
index 471e0f6..bd9e634 100644 (file)
--- a/drivers/net/wireless/ath/ath9k/beacon.c
+++ b/drivers/net/wireless/ath/ath9k/beacon.c
@@ -312,10 +312,9 @@ static void ath9k_csa_update_vif(void *data, u8 *mac, struct ieee80211_vif *vif)
 
 void ath9k_csa_update(struct ath_softc *sc)
 {
-       ieee80211_iterate_active_interfaces(sc->hw,
-                                           IEEE80211_IFACE_ITER_NORMAL,
-                                           ath9k_csa_update_vif,
-                                           sc);
+       ieee80211_iterate_active_interfaces_atomic(sc->hw,
+                                                  IEEE80211_IFACE_ITER_NORMAL,
+                                                  ath9k_csa_update_vif, sc);
 }
 
 void ath9k_beacon_tasklet(unsigned long data)