Merge tag 'y2038-for-4.21' of ssh://gitolite.kernel.org:/pub/scm/linux/kernel/git...

[linux-2.6-microblaze.git] / net / ethernet / eth.c

diff --git a/net/ethernet/eth.c b/net/ethernet/eth.c
index fd8faa0..4c52011 100644 (file)
--- a/net/ethernet/eth.c
+++ b/net/ethernet/eth.c
@@ -47,6 +47,7 @@
 #include <linux/inet.h>
 #include <linux/ip.h>
 #include <linux/netdevice.h>
+#include <linux/nvmem-consumer.h>
 #include <linux/etherdevice.h>
 #include <linux/skbuff.h>
 #include <linux/errno.h>
@@ -165,15 +166,17 @@ __be16 eth_type_trans(struct sk_buff *skb, struct net_device *dev)
        eth = (struct ethhdr *)skb->data;
        skb_pull_inline(skb, ETH_HLEN);
 
-       if (unlikely(is_multicast_ether_addr_64bits(eth->h_dest))) {
-               if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast))
-                       skb->pkt_type = PACKET_BROADCAST;
-               else
-                       skb->pkt_type = PACKET_MULTICAST;
+       if (unlikely(!ether_addr_equal_64bits(eth->h_dest,
+                                             dev->dev_addr))) {
+               if (unlikely(is_multicast_ether_addr_64bits(eth->h_dest))) {
+                       if (ether_addr_equal_64bits(eth->h_dest, dev->broadcast))
+                               skb->pkt_type = PACKET_BROADCAST;
+                       else
+                               skb->pkt_type = PACKET_MULTICAST;
+               } else {
+                       skb->pkt_type = PACKET_OTHERHOST;
+               }
        }
-       else if (unlikely(!ether_addr_equal_64bits(eth->h_dest,
-                                                  dev->dev_addr)))
-               skb->pkt_type = PACKET_OTHERHOST;
 
        /*
         * Some variants of DSA tagging don't have an ethertype field
@@ -548,3 +551,40 @@ int eth_platform_get_mac_address(struct device *dev, u8 *mac_addr)
        return 0;
 }
 EXPORT_SYMBOL(eth_platform_get_mac_address);
+
+/**
+ * Obtain the MAC address from an nvmem cell named 'mac-address' associated
+ * with given device.
+ *
+ * @dev:       Device with which the mac-address cell is associated.
+ * @addrbuf:   Buffer to which the MAC address will be copied on success.
+ *
+ * Returns 0 on success or a negative error number on failure.
+ */
+int nvmem_get_mac_address(struct device *dev, void *addrbuf)
+{
+       struct nvmem_cell *cell;
+       const void *mac;
+       size_t len;
+
+       cell = nvmem_cell_get(dev, "mac-address");
+       if (IS_ERR(cell))
+               return PTR_ERR(cell);
+
+       mac = nvmem_cell_read(cell, &len);
+       nvmem_cell_put(cell);
+
+       if (IS_ERR(mac))
+               return PTR_ERR(mac);
+
+       if (len != ETH_ALEN || !is_valid_ether_addr(mac)) {
+               kfree(mac);
+               return -EINVAL;
+       }
+
+       ether_addr_copy(addrbuf, mac);
+       kfree(mac);
+
+       return 0;
+}
+EXPORT_SYMBOL(nvmem_get_mac_address);