--- /dev/null
+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);
--- /dev/null
+--- a/drivers/net/ethernet/broadcom/bgmac.c
++++ b/drivers/net/ethernet/broadcom/bgmac.c
+@@ -761,6 +761,26 @@ static void bgmac_cmdcfg_maskset(struct
+ udelay(2);
+ }
+
++static void bgmac_write_mac_address(struct bgmac *bgmac, u8 *addr)
++{
++ u32 tmp;
++
++ tmp = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) | addr[3];
++ bgmac_write(bgmac, BGMAC_MACADDR_HIGH, tmp);
++ tmp = (addr[4] << 8) | addr[5];
++ bgmac_write(bgmac, BGMAC_MACADDR_LOW, tmp);
++}
++
++static void bgmac_set_rx_mode(struct net_device *net_dev)
++{
++ struct bgmac *bgmac = netdev_priv(net_dev);
++
++ if (net_dev->flags & IFF_PROMISC)
++ bgmac_cmdcfg_maskset(bgmac, ~0, BGMAC_CMDCFG_PROM, false);
++ else
++ bgmac_cmdcfg_maskset(bgmac, ~BGMAC_CMDCFG_PROM, 0, false);
++}
++
+ #if 0 /* We don't use that regs yet */
+ static void bgmac_chip_stats_update(struct bgmac *bgmac)
+ {
+@@ -889,8 +909,10 @@ static void bgmac_chip_reset(struct bgma
+ sw_type = et_swtype;
+ } else if (ci->id == BCMA_CHIP_ID_BCM5357 && ci->pkg == 9) {
+ sw_type = BGMAC_CHIPCTL_1_SW_TYPE_EPHYRMII;
+- } else if (0) {
+- /* TODO */
++ } else if ((ci->id != BCMA_CHIP_ID_BCM53572 && ci->pkg == 10) ||
++ (ci->id == BCMA_CHIP_ID_BCM53572 && ci->pkg == 9)) {
++ sw_type = BGMAC_CHIPCTL_1_IF_TYPE_RGMII |
++ BGMAC_CHIPCTL_1_SW_TYPE_RGMII;
+ }
+ bcma_chipco_chipctl_maskset(cc, 1,
+ ~(BGMAC_CHIPCTL_1_IF_TYPE_MASK |
+@@ -1004,8 +1026,6 @@ static void bgmac_enable(struct bgmac *b
+ static void bgmac_chip_init(struct bgmac *bgmac, bool full_init)
+ {
+ struct bgmac_dma_ring *ring;
+- u8 *mac = bgmac->net_dev->dev_addr;
+- u32 tmp;
+ int i;
+
+ /* 1 interrupt per received frame */
+@@ -1014,16 +1034,9 @@ static void bgmac_chip_init(struct bgmac
+ /* Enable 802.3x tx flow control (honor received PAUSE frames) */
+ bgmac_cmdcfg_maskset(bgmac, ~BGMAC_CMDCFG_RPI, 0, true);
+
+- if (bgmac->net_dev->flags & IFF_PROMISC)
+- bgmac_cmdcfg_maskset(bgmac, ~0, BGMAC_CMDCFG_PROM, false);
+- else
+- bgmac_cmdcfg_maskset(bgmac, ~BGMAC_CMDCFG_PROM, 0, false);
++ bgmac_set_rx_mode(bgmac->net_dev);
+
+- /* Set MAC addr */
+- tmp = (mac[0] << 24) | (mac[1] << 16) | (mac[2] << 8) | mac[3];
+- bgmac_write(bgmac, BGMAC_MACADDR_HIGH, tmp);
+- tmp = (mac[4] << 8) | mac[5];
+- bgmac_write(bgmac, BGMAC_MACADDR_LOW, tmp);
++ bgmac_write_mac_address(bgmac, bgmac->net_dev->dev_addr);
+
+ if (bgmac->loopback)
+ bgmac_cmdcfg_maskset(bgmac, ~0, BGMAC_CMDCFG_ML, true);
+@@ -1160,6 +1173,19 @@ static netdev_tx_t bgmac_start_xmit(stru
+ return bgmac_dma_tx_add(bgmac, ring, skb);
+ }
+
++static int bgmac_set_mac_address(struct net_device *net_dev, void *addr)
++{
++ struct bgmac *bgmac = netdev_priv(net_dev);
++ int ret;
++
++ ret = eth_prepare_mac_addr_change(net_dev, addr);
++ if (ret < 0)
++ return ret;
++ bgmac_write_mac_address(bgmac, (u8 *)addr);
++ eth_commit_mac_addr_change(net_dev, addr);
++ return 0;
++}
++
+ static int bgmac_ioctl(struct net_device *net_dev, struct ifreq *ifr, int cmd)
+ {
+ struct bgmac *bgmac = netdev_priv(net_dev);
+@@ -1190,7 +1216,9 @@ static const struct net_device_ops bgmac
+ .ndo_open = bgmac_open,
+ .ndo_stop = bgmac_stop,
+ .ndo_start_xmit = bgmac_start_xmit,
+- .ndo_set_mac_address = eth_mac_addr, /* generic, sets dev_addr */
++ .ndo_set_rx_mode = bgmac_set_rx_mode,
++ .ndo_set_mac_address = bgmac_set_mac_address,
++ .ndo_validate_addr = eth_validate_addr,
+ .ndo_do_ioctl = bgmac_ioctl,
+ };
+
+--- a/drivers/net/ethernet/broadcom/bgmac.h
++++ b/drivers/net/ethernet/broadcom/bgmac.h
+@@ -339,7 +339,7 @@
+ #define BGMAC_CHIPCTL_1_SW_TYPE_EPHY 0x00000000
+ #define BGMAC_CHIPCTL_1_SW_TYPE_EPHYMII 0x00000040
+ #define BGMAC_CHIPCTL_1_SW_TYPE_EPHYRMII 0x00000080
+-#define BGMAC_CHIPCTL_1_SW_TYPE_RGMI 0x000000C0
++#define BGMAC_CHIPCTL_1_SW_TYPE_RGMII 0x000000C0
+ #define BGMAC_CHIPCTL_1_RXC_DLL_BYPASS 0x00010000
+
+ #define BGMAC_SPEED_10 0x0001
projects / 15.05 / openwrt.git / commitdiff