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-rw-r--r--net/ethernet/eth.c31
1 files changed, 31 insertions, 0 deletions
diff --git a/net/ethernet/eth.c b/net/ethernet/eth.c
index 9e63f252a89e..103871784e50 100644
--- a/net/ethernet/eth.c
+++ b/net/ethernet/eth.c
@@ -52,6 +52,8 @@
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/if_ether.h>
+#include <linux/of_net.h>
+#include <linux/pci.h>
#include <net/dst.h>
#include <net/arp.h>
#include <net/sock.h>
@@ -485,3 +487,32 @@ static int __init eth_offload_init(void)
}
fs_initcall(eth_offload_init);
+
+unsigned char * __weak arch_get_platform_mac_address(void)
+{
+ return NULL;
+}
+
+int eth_platform_get_mac_address(struct device *dev, u8 *mac_addr)
+{
+ const unsigned char *addr;
+ struct device_node *dp;
+
+ if (dev_is_pci(dev))
+ dp = pci_device_to_OF_node(to_pci_dev(dev));
+ else
+ dp = dev->of_node;
+
+ addr = NULL;
+ if (dp)
+ addr = of_get_mac_address(dp);
+ if (!addr)
+ addr = arch_get_platform_mac_address();
+
+ if (!addr)
+ return -ENODEV;
+
+ ether_addr_copy(mac_addr, addr);
+ return 0;
+}
+EXPORT_SYMBOL(eth_platform_get_mac_address);