mac80211: allow interface settings changes only when down
We currently allow monitor flags changes and mesh ID changes when
the interface is up, which can lead to trouble. Change it to only
allow when down.
Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/mac80211/cfg.c b/net/mac80211/cfg.c
index a8501f1..89a183c 100644
--- a/net/mac80211/cfg.c
+++ b/net/mac80211/cfg.c
@@ -100,6 +100,9 @@
if (ret)
return ret;
+ if (netif_running(sdata->dev))
+ return -EBUSY;
+
if (ieee80211_vif_is_mesh(&sdata->vif) && params->mesh_id_len)
ieee80211_sdata_set_mesh_id(sdata,
params->mesh_id_len,