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[PATCH] mac80211: reject software RSSI CQM with beacon filtering

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From: Johannes Berg <johannes.berg@xxxxxxxxx>

When beacon filtering is enabled the mac80211 software implementation
for RSSI CQM cannot work as beacons will not be available. Rather than
accepting such a configuration without proper effect, reject it.

Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
---
 net/mac80211/cfg.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index f4ed256c2d8e..a30ec3ce3d25 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -2468,6 +2468,10 @@ static int ieee80211_set_cqm_rssi_config(struct wiphy *wiphy,
 	    rssi_hyst == bss_conf->cqm_rssi_hyst)
 		return 0;
 
+	if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER &&
+	    !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI))
+		return -EOPNOTSUPP;
+
 	bss_conf->cqm_rssi_thold = rssi_thold;
 	bss_conf->cqm_rssi_hyst = rssi_hyst;
 
-- 
2.1.4

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