diff options
Diffstat (limited to 'target/linux/brcm47xx/patches-3.6/720-eth-backport.patch')
| -rw-r--r-- | target/linux/brcm47xx/patches-3.6/720-eth-backport.patch | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/target/linux/brcm47xx/patches-3.6/720-eth-backport.patch b/target/linux/brcm47xx/patches-3.6/720-eth-backport.patch new file mode 100644 index 0000000000..98da18a3b9 --- /dev/null +++ b/target/linux/brcm47xx/patches-3.6/720-eth-backport.patch @@ -0,0 +1,94 @@ +commit fa0879e37b59e8e3f130a30a9e6fa515717c5bdd +Author: Stefan Hajnoczi <stefanha@gmail.com> +Date: Mon Jan 21 01:17:22 2013 +0000 + + net: split eth_mac_addr for better error handling + + When we set mac address, software mac address in system and hardware mac + address all need to be updated. Current eth_mac_addr() doesn't allow + callers to implement error handling nicely. + + This patch split eth_mac_addr() to prepare part and real commit part, + then we can prepare first, and try to change hardware address, then do + the real commit if hardware address is set successfully. + + Signed-off-by: Stefan Hajnoczi <stefanha@gmail.com> + Signed-off-by: Amos Kong <akong@redhat.com> + Signed-off-by: David S. Miller <davem@davemloft.net> + +--- a/include/linux/etherdevice.h ++++ b/include/linux/etherdevice.h +@@ -40,6 +40,8 @@ extern int eth_header_cache(const struct + extern void eth_header_cache_update(struct hh_cache *hh, + const struct net_device *dev, + const unsigned char *haddr); ++extern int eth_prepare_mac_addr_change(struct net_device *dev, void *p); ++extern void eth_commit_mac_addr_change(struct net_device *dev, void *p); + 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); +--- a/net/ethernet/eth.c ++++ b/net/ethernet/eth.c +@@ -278,16 +278,11 @@ void eth_header_cache_update(struct hh_c + EXPORT_SYMBOL(eth_header_cache_update); + + /** +- * eth_mac_addr - set new Ethernet hardware address ++ * eth_prepare_mac_addr_change - prepare for mac change + * @dev: network device + * @p: socket address +- * +- * Change hardware address of device. +- * +- * This doesn't change hardware matching, so needs to be overridden +- * for most real devices. + */ +-int eth_mac_addr(struct net_device *dev, void *p) ++int eth_prepare_mac_addr_change(struct net_device *dev, void *p) + { + struct sockaddr *addr = p; + +@@ -295,9 +290,43 @@ int eth_mac_addr(struct net_device *dev, + return -EBUSY; + if (!is_valid_ether_addr(addr->sa_data)) + return -EADDRNOTAVAIL; ++ return 0; ++} ++EXPORT_SYMBOL(eth_prepare_mac_addr_change); ++ ++/** ++ * eth_commit_mac_addr_change - commit mac change ++ * @dev: network device ++ * @p: socket address ++ */ ++void eth_commit_mac_addr_change(struct net_device *dev, void *p) ++{ ++ struct sockaddr *addr = p; ++ + memcpy(dev->dev_addr, addr->sa_data, ETH_ALEN); + /* if device marked as NET_ADDR_RANDOM, reset it */ + dev->addr_assign_type &= ~NET_ADDR_RANDOM; ++} ++EXPORT_SYMBOL(eth_commit_mac_addr_change); ++ ++/** ++ * eth_mac_addr - set new Ethernet hardware address ++ * @dev: network device ++ * @p: socket address ++ * ++ * Change hardware address of device. ++ * ++ * This doesn't change hardware matching, so needs to be overridden ++ * for most real devices. ++ */ ++int eth_mac_addr(struct net_device *dev, void *p) ++{ ++ int ret; ++ ++ ret = eth_prepare_mac_addr_change(dev, p); ++ if (ret < 0) ++ return ret; ++ eth_commit_mac_addr_change(dev, p); + return 0; + } + EXPORT_SYMBOL(eth_mac_addr); |