--- /dev/null
+--- a/drivers/net/wireless/ath/ath5k/mac80211-ops.c
++++ b/drivers/net/wireless/ath/ath5k/mac80211-ops.c
+@@ -97,13 +97,8 @@ ath5k_add_interface(struct ieee80211_hw
+ goto end;
+ }
+
+- /* Don't allow other interfaces if one ad-hoc is configured.
+- * TODO: Fix the problems with ad-hoc and multiple other interfaces.
+- * We would need to operate the HW in ad-hoc mode to allow TSF updates
+- * for the IBSS, but this breaks with additional AP or STA interfaces
+- * at the moment. */
+- if (sc->num_adhoc_vifs ||
+- (sc->nvifs && vif->type == NL80211_IFTYPE_ADHOC)) {
++ /* Don't allow more than one ad-hoc interface */
++ if (sc->num_adhoc_vifs && vif->type == NL80211_IFTYPE_ADHOC) {
+ ATH5K_ERR(sc, "Only one single ad-hoc interface is allowed.\n");
+ ret = -ELNRNG;
+ goto end;
+--- a/drivers/net/wireless/ath/ath5k/base.c
++++ b/drivers/net/wireless/ath/ath5k/base.c
+@@ -1857,7 +1857,7 @@ ath5k_beacon_send(struct ath5k_softc *sc
+ sc->bmisscount = 0;
+ }
+
+- if ((sc->opmode == NL80211_IFTYPE_AP && sc->num_ap_vifs > 1) ||
++ if ((sc->opmode == NL80211_IFTYPE_AP && sc->num_ap_vifs + sc->num_adhoc_vifs > 1) ||
+ sc->opmode == NL80211_IFTYPE_MESH_POINT) {
+ u64 tsf = ath5k_hw_get_tsf64(ah);
+ u32 tsftu = TSF_TO_TU(tsf);
+@@ -1935,7 +1935,7 @@ ath5k_beacon_update_timers(struct ath5k_
+ u64 hw_tsf;
+
+ intval = sc->bintval & AR5K_BEACON_PERIOD;
+- if (sc->opmode == NL80211_IFTYPE_AP && sc->num_ap_vifs > 1) {
++ if (sc->opmode == NL80211_IFTYPE_AP && sc->num_ap_vifs + sc->num_adhoc_vifs > 1) {
+ intval /= ATH_BCBUF; /* staggered multi-bss beacons */
+ if (intval < 15)
+ ATH5K_WARN(sc, "intval %u is too low, min 15\n",
u32 ah_ant_ctl[AR5K_EEPROM_N_MODES][AR5K_ANT_MAX];
--- a/drivers/net/wireless/ath/ath5k/mac80211-ops.c
+++ b/drivers/net/wireless/ath/ath5k/mac80211-ops.c
-@@ -282,6 +282,15 @@ ath5k_bss_info_changed(struct ieee80211_
+@@ -277,6 +277,15 @@ ath5k_bss_info_changed(struct ieee80211_
if (changes & BSS_CHANGED_BEACON_INT)
sc->bintval = bss_conf->beacon_int;