Patch fixes the kernel trace when user tries to set
ad-hoc mode on non IBSS channel.
e.g iwconfig wlan0 chan 36 mode ad-hoc
Signed-off-by: Abhijeet Kolekar <abhijeet.kolekar@xxxxxxxxx>
---
net/mac80211/wext.c | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/net/mac80211/wext.c b/net/mac80211/wext.c
index 63f36e9..5a9bc8c 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 +282,15 @@ static int ieee80211_ioctl_siwmode(struct net_device *dev,
type = NL80211_IFTYPE_STATION;
break;
case IW_MODE_ADHOC:
+ /* Following check added to avoid misconfiguration if
+ * you set mode and frequency at the same time.
+ */
+ if (local->oper_channel && local->oper_channel->flags &
+ IEEE80211_CHAN_NO_IBSS) {
+ printk(KERN_DEBUG "Not a valid IBSS channel\n");
+ return -EOPNOTSUPP;
+ }
+
type = NL80211_IFTYPE_ADHOC;
break;
case IW_MODE_REPEAT:
--
1.5.4.3
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