diff --git a/net/mac80211/wext.c b/net/mac80211/wext.c index 742f811ca416e5b16701ce2ae49f582ed32317a6..ab4ddba874be5ce73cb4ffc0b5e7e1da77053dac 100644 --- a/net/mac80211/wext.c +++ b/net/mac80211/wext.c @@ -271,6 +271,7 @@ static int ieee80211_ioctl_siwmode(struct net_device *dev, __u32 *mode, char *extra) { struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev); + struct ieee80211_local *local = sdata->local; int type; if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) @@ -281,6 +282,13 @@ static int ieee80211_ioctl_siwmode(struct net_device *dev, type = NL80211_IFTYPE_STATION; break; case IW_MODE_ADHOC: + /* Setting ad-hoc mode on non ibss channel is not + * supported. + */ + if (local->oper_channel && + (local->oper_channel->flags & IEEE80211_CHAN_NO_IBSS)) + return -EOPNOTSUPP; + type = NL80211_IFTYPE_ADHOC; break; case IW_MODE_REPEAT: