mac80211: update bssid_indicator in ieee80211_assign_beacon

Update bssid_indicator in ieee80211_bss_conf according to the
number of bssid in the set.

Signed-off-by: Lorenzo Bianconi <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Johannes Berg <[e-mail]>

net/mac80211/cfg.c

···
 		new->mbssid_ies = (void *)pos;
 		pos += struct_size(new->mbssid_ies, elem, mbssid->cnt);
 		ieee80211_copy_mbssid_beacon(pos, new->mbssid_ies, mbssid);
+		/* update bssid_indicator */
+		sdata->vif.bss_conf.bssid_indicator =
+			ilog2(__roundup_pow_of_two(mbssid->cnt + 1));
 	}
 
 	if (csa) {