From: Hauke Mehrtens <hauke@hauke-m.de>
Date: Wed, 5 May 2010 22:27:37 +0000 (+0200)
Subject: compat: backport eth_change_mtu and eth_validate_addr
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=53308ab1a7960306867a660b86bcfc2a5c872b73;p=openwrt%2Fstaging%2Fblogic.git

compat: backport eth_change_mtu and eth_validate_addr

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
---

diff --git a/compat/compat-2.6.29.c b/compat/compat-2.6.29.c
index 5ee1e44cd347..8c725ee73151 100644
--- a/compat/compat-2.6.29.c
+++ b/compat/compat-2.6.29.c
@@ -98,6 +98,32 @@ int eth_mac_addr(struct net_device *dev, void *p)
 	return 0;
 }
 EXPORT_SYMBOL(eth_mac_addr);
+
+/**
+ * eth_change_mtu - set new MTU size
+ * @dev: network device
+ * @new_mtu: new Maximum Transfer Unit
+ *
+ * Allow changing MTU size. Needs to be overridden for devices
+ * supporting jumbo frames.
+ */
+int eth_change_mtu(struct net_device *dev, int new_mtu)
+{
+	if (new_mtu < 68 || new_mtu > ETH_DATA_LEN)
+		return -EINVAL;
+	dev->mtu = new_mtu;
+	return 0;
+}
+EXPORT_SYMBOL(eth_change_mtu);
+
+int eth_validate_addr(struct net_device *dev)
+{
+	if (!is_valid_ether_addr(dev->dev_addr))
+		return -EADDRNOTAVAIL;
+
+	return 0;
+}
+EXPORT_SYMBOL(eth_validate_addr);
 /* Source: net/ethernet/eth.c */
 
 
diff --git a/include/linux/compat-2.6.29.h b/include/linux/compat-2.6.29.h
index 165b78c33c27..f063e240cef5 100644
--- a/include/linux/compat-2.6.29.h
+++ b/include/linux/compat-2.6.29.h
@@ -246,6 +246,8 @@ extern void usb_unpoison_anchored_urbs(struct usb_anchor *anchor);
 )
 
 extern int eth_mac_addr(struct net_device *dev, void *p);
+extern int eth_change_mtu(struct net_device *dev, int new_mtu);
+extern int eth_validate_addr(struct net_device *dev);
 
 #else