mac80211: fix maximum MTU

The maximum MTU shouldn't take the headers into account,
the maximum MSDU size is exactly the maximum MTU.

Signed-off-by: T Krishna Chaitanya <chaitanyatk@posedge.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/net/mac80211/iface.c b/net/mac80211/iface.c
index 0f2a9f9..8be854e 100644 (file)
--- a/net/mac80211/iface.c
+++ b/net/mac80211/iface.c
@@ -207,17 +207,8 @@ void ieee80211_recalc_idle(struct ieee80211_local *local)
 
 static int ieee80211_change_mtu(struct net_device *dev, int new_mtu)
 {
-       int meshhdrlen;
-       struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
-
-       meshhdrlen = (sdata->vif.type == NL80211_IFTYPE_MESH_POINT) ? 5 : 0;
-
-       /* FIX: what would be proper limits for MTU?
-        * This interface uses 802.3 frames. */
-       if (new_mtu < 256 ||
-           new_mtu > IEEE80211_MAX_DATA_LEN - 24 - 6 - meshhdrlen) {
+       if (new_mtu < 256 || new_mtu > IEEE80211_MAX_DATA_LEN)
                return -EINVAL;
-       }
 
        dev->mtu = new_mtu;
        return 0;