X-Git-Url: http://git.openwrt.org/?p=openwrt%2Fopenwrt.git;a=blobdiff_plain;f=package%2Fkernel%2Flantiq%2Fltq-ptm%2Fsrc%2Fifxmips_ptm_vdsl.c;fp=package%2Fkernel%2Flantiq%2Fltq-ptm%2Fsrc%2Fifxmips_ptm_vdsl.c;h=bc27c270d825543dfab270ed9767402af5f6ceb4;hp=41464e6c27765745aa0c6cd9ffbe07455ff19d6d;hb=8a2a20e71e2909f84dab47e51dfda9e292a6c1ae;hpb=cf458de382fc6f6a8715fadb3edf152d0196a26a

diff --git a/package/kernel/lantiq/ltq-ptm/src/ifxmips_ptm_vdsl.c b/package/kernel/lantiq/ltq-ptm/src/ifxmips_ptm_vdsl.c
index 41464e6c27..bc27c270d8 100644
--- a/package/kernel/lantiq/ltq-ptm/src/ifxmips_ptm_vdsl.c
+++ b/package/kernel/lantiq/ltq-ptm/src/ifxmips_ptm_vdsl.c
@@ -74,6 +74,7 @@ static int ptm_stop(struct net_device *);
   static unsigned int ptm_poll(int, unsigned int);
   static int ptm_napi_poll(struct napi_struct *, int);
 static int ptm_hard_start_xmit(struct sk_buff *, struct net_device *);
+static int ptm_change_mtu(struct net_device *, int);
 static int ptm_ioctl(struct net_device *, struct ifreq *, int);
 static void ptm_tx_timeout(struct net_device *);
 
@@ -114,7 +115,7 @@ static struct net_device_ops g_ptm_netdev_ops = {
     .ndo_start_xmit      = ptm_hard_start_xmit,
     .ndo_validate_addr   = eth_validate_addr,
     .ndo_set_mac_address = eth_mac_addr,
-    .ndo_change_mtu      = eth_change_mtu,
+    .ndo_change_mtu      = ptm_change_mtu,
     .ndo_do_ioctl        = ptm_ioctl,
     .ndo_tx_timeout      = ptm_tx_timeout,
 };
@@ -358,6 +359,15 @@ PTM_HARD_START_XMIT_FAIL:
     return 0;
 }
 
+static int ptm_change_mtu(struct net_device *dev, int mtu)
+{
+	/* Allow up to 1508 bytes, for RFC4638 */
+        if (mtu < 68 || mtu > ETH_DATA_LEN + 8)
+                return -EINVAL;
+        dev->mtu = mtu;
+        return 0;
+}
+
 static int ptm_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
 {
     ASSERT(dev == g_net_dev[0], "incorrect device");