net: use core MTU range checking in wireless drivers

- set max_mtu in wil6210 driver
- set max_mtu in atmel driver
- set min/max_mtu in cisco airo driver, remove airo_change_mtu
- set min/max_mtu in ipw2100/ipw2200 drivers, remove libipw_change_mtu
- set min/max_mtu in p80211netdev, remove wlan_change_mtu
- set min/max_mtu in net/mac80211/iface.c and remove ieee80211_change_mtu
- set min/max_mtu in wimax/i2400m and remove i2400m_change_mtu
- set min/max_mtu in intersil/hostap and remove prism2_change_mtu
- set min/max_mtu in intersil/orinoco
- set min/max_mtu in tty/n_gsm and remove gsm_change_mtu

CC: netdev@vger.kernel.org
CC: linux-wireless@vger.kernel.org
CC: Maya Erez <qca_merez@qca.qualcomm.com>
CC: Simon Kelley <simon@thekelleys.org.uk>
CC: Stanislav Yakovlev <stas.yakovlev@gmail.com>
CC: Johannes Berg <johannes@sipsolutions.net>
CC: Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 13 deletions

diff --git a/drivers/staging/wlan-ng/p80211netdev.c b/drivers/staging/wlan-ng/p80211netdev.c
index 825a63a..4762d38 100644
--- a/drivers/staging/wlan-ng/p80211netdev.c
+++ b/drivers/staging/wlan-ng/p80211netdev.c
@@ -669,18 +669,6 @@ static int p80211knetdev_set_mac_address(struct net_device *dev, void *addr)
 	return result;
 }
 
-static int wlan_change_mtu(struct net_device *dev, int new_mtu)
-{
-	/* 2312 is max 802.11 payload, 20 is overhead, (ether + llc +snap)
-	   and another 8 for wep. */
-	if ((new_mtu < 68) || (new_mtu > (2312 - 20 - 8)))
-		return -EINVAL;
-
-	dev->mtu = new_mtu;
-
-	return 0;
-}
-
 static const struct net_device_ops p80211_netdev_ops = {
 	.ndo_init = p80211knetdev_init,
 	.ndo_open = p80211knetdev_open,
@@ -690,7 +678,6 @@ static const struct net_device_ops p80211_netdev_ops = {
 	.ndo_do_ioctl = p80211knetdev_do_ioctl,
 	.ndo_set_mac_address = p80211knetdev_set_mac_address,
 	.ndo_tx_timeout = p80211knetdev_tx_timeout,
-	.ndo_change_mtu = wlan_change_mtu,
 	.ndo_validate_addr = eth_validate_addr,
 };
 
@@ -756,6 +743,11 @@ int wlan_setup(struct wlandevice *wlandev, struct device *physdev)
 		wdev->wiphy = wiphy;
 		wdev->iftype = NL80211_IFTYPE_STATION;
 		netdev->ieee80211_ptr = wdev;
+		netdev->min_mtu = 68;
+		/* 2312 is max 802.11 payload, 20 is overhead,
+		 * (ether + llc + snap) and another 8 for wep.
+		 */
+		netdev->max_mtu = (2312 - 20 - 8);
 
 		netif_stop_queue(netdev);
 		netif_carrier_off(netdev);