1 files changed, 18 insertions, 4 deletions

diff --git a/drivers/net/r8169.c b/drivers/net/r8169.c
index cd9a21581f56..2b4e975770f3 100644
--- a/drivers/net/r8169.c
+++ b/drivers/net/r8169.c
@@ -81,6 +81,10 @@ static const int multicast_filter_limit = 32;
 #define RTL8169_TX_TIMEOUT      (6*HZ)
 #define RTL8169_PHY_TIMEOUT     (10*HZ)
 
+#define RTL_EEPROM_SIG          cpu_to_le32(0x8129)
+#define RTL_EEPROM_SIG_MASK     cpu_to_le32(0xffff)
+#define RTL_EEPROM_SIG_ADDR     0x0000
+
 /* write/read MMIO register */
 #define RTL_W8(reg, val8)       writeb ((val8), ioaddr + (reg))
 #define RTL_W16(reg, val16)     writew ((val16), ioaddr + (reg))
@@ -1944,9 +1948,10 @@ static void rtl_init_mac_address(struct rtl8169_private *tp,
                                  void __iomem *ioaddr)
 {
         struct pci_dev *pdev = tp->pci_dev;
-        u8 cfg1;
         int vpd_cap;
+        __le32 sig;
         u8 mac[8];
+        u8 cfg1;
 
         cfg1 = RTL_R8(Config1);
         if (!(cfg1  & VPD)) {
@@ -1961,7 +1966,16 @@ static void rtl_init_mac_address(struct rtl8169_private *tp,
         if (!vpd_cap)
                 return;
 
-        /* MAC address is stored in EEPROM at offset 0x0e
+        if (rtl_eeprom_read(pdev, vpd_cap, RTL_EEPROM_SIG_ADDR, &sig) < 0)
+                return;
+
+        if ((sig & RTL_EEPROM_SIG_MASK) != RTL_EEPROM_SIG) {
+                dev_info(&pdev->dev, "Missing EEPROM signature: %08x\n", sig);
+                return;
+        }
+
+        /*
+         * MAC address is stored in EEPROM at offset 0x0e
          * Realtek says: "The VPD address does not have to be a DWORD-aligned
          * address as defined in the PCI 2.2 Specifications, but the VPD data
          * is always consecutive 4-byte data starting from the VPD address
@@ -1983,8 +1997,8 @@ static void rtl_init_mac_address(struct rtl8169_private *tp,
                          print_mac(buf, mac));
         }
 
-        /* Write MAC address */
-        rtl_rar_set(tp, mac);
+        if (is_valid_ether_addr(mac))
+                rtl_rar_set(tp, mac);
 }
 
 static int __devinit