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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>
This commit is contained in:
Chaitanya 2012-12-21 17:15:17 +05:30 committed by Johannes Berg
parent 826262c3d2
commit 09b1426e7f
1 changed files with 1 additions and 10 deletions
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11
net/mac80211/iface.c
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@ -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;