ath9k: prepare for multi-interface CSA support
Soon mac80211 will support multi-interface CSA so
using sc->csa_vif is not an option.
Instead just depend on vif->csa_active. Calling
ieee80211_csa_finish() multiple number of times
should not be an issue.
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/ath/ath9k/ath9k.h b/drivers/net/wireless/ath/ath9k/ath9k.h
index b5ac32c..7fde8ec 100644
--- a/drivers/net/wireless/ath/ath9k/ath9k.h
+++ b/drivers/net/wireless/ath/ath9k/ath9k.h
@@ -442,7 +442,8 @@
void ath9k_beacon_assign_slot(struct ath_softc *sc, struct ieee80211_vif *vif);
void ath9k_beacon_remove_slot(struct ath_softc *sc, struct ieee80211_vif *vif);
void ath9k_set_beacon(struct ath_softc *sc);
-bool ath9k_csa_is_finished(struct ath_softc *sc);
+bool ath9k_csa_is_finished(struct ath_softc *sc, struct ieee80211_vif *vif);
+void ath9k_csa_update(struct ath_softc *sc);
/*******************/
/* Link Monitoring */
@@ -774,7 +775,6 @@
#endif
struct ath_descdma txsdma;
- struct ieee80211_vif *csa_vif;
struct ath_ant_comb ant_comb;
u8 ant_tx, ant_rx;
diff --git a/drivers/net/wireless/ath/ath9k/beacon.c b/drivers/net/wireless/ath/ath9k/beacon.c
index 2e8bba0..32d00e8 100644
--- a/drivers/net/wireless/ath/ath9k/beacon.c
+++ b/drivers/net/wireless/ath/ath9k/beacon.c
@@ -292,11 +292,8 @@
(unsigned long long)tsfadjust, avp->av_bslot);
}
-bool ath9k_csa_is_finished(struct ath_softc *sc)
+bool ath9k_csa_is_finished(struct ath_softc *sc, struct ieee80211_vif *vif)
{
- struct ieee80211_vif *vif;
-
- vif = sc->csa_vif;
if (!vif || !vif->csa_active)
return false;
@@ -304,11 +301,23 @@
return false;
ieee80211_csa_finish(vif);
-
- sc->csa_vif = NULL;
return true;
}
+static void ath9k_csa_update_vif(void *data, u8 *mac, struct ieee80211_vif *vif)
+{
+ struct ath_softc *sc = data;
+ ath9k_csa_is_finished(sc, vif);
+}
+
+void ath9k_csa_update(struct ath_softc *sc)
+{
+ ieee80211_iterate_active_interfaces(sc->hw,
+ IEEE80211_IFACE_ITER_NORMAL,
+ ath9k_csa_update_vif,
+ sc);
+}
+
void ath9k_beacon_tasklet(unsigned long data)
{
struct ath_softc *sc = (struct ath_softc *)data;
@@ -362,13 +371,13 @@
return;
}
- /* EDMA devices check that in the tx completion function. */
- if (!edma && ath9k_csa_is_finished(sc))
- return;
-
slot = ath9k_beacon_choose_slot(sc);
vif = sc->beacon.bslot[slot];
+ /* EDMA devices check that in the tx completion function. */
+ if (!edma && ath9k_csa_is_finished(sc, vif))
+ return;
+
if (!vif || !vif->bss_conf.enable_beacon)
return;
diff --git a/drivers/net/wireless/ath/ath9k/main.c b/drivers/net/wireless/ath/ath9k/main.c
index 5924f72d..317fcb9 100644
--- a/drivers/net/wireless/ath/ath9k/main.c
+++ b/drivers/net/wireless/ath/ath9k/main.c
@@ -1178,9 +1178,6 @@
if (ath9k_uses_beacons(vif->type))
ath9k_beacon_remove_slot(sc, vif);
- if (sc->csa_vif == vif)
- sc->csa_vif = NULL;
-
ath9k_ps_wakeup(sc);
ath9k_calculate_summary_state(hw, NULL);
ath9k_ps_restore(sc);
@@ -2086,13 +2083,8 @@
struct ieee80211_vif *vif,
struct cfg80211_chan_def *chandef)
{
- struct ath_softc *sc = hw->priv;
-
- /* mac80211 does not support CSA in multi-if cases (yet) */
- if (WARN_ON(sc->csa_vif))
- return;
-
- sc->csa_vif = vif;
+ /* depend on vif->csa_active only */
+ return;
}
struct ieee80211_ops ath9k_ops = {
diff --git a/drivers/net/wireless/ath/ath9k/xmit.c b/drivers/net/wireless/ath/ath9k/xmit.c
index 0a75e2f..a650704 100644
--- a/drivers/net/wireless/ath/ath9k/xmit.c
+++ b/drivers/net/wireless/ath/ath9k/xmit.c
@@ -2566,7 +2566,7 @@
sc->beacon.tx_processed = true;
sc->beacon.tx_last = !(ts.ts_status & ATH9K_TXERR_MASK);
- ath9k_csa_is_finished(sc);
+ ath9k_csa_update(sc);
continue;
}