pasemi_mac: Fix local-mac-address parsing

Turns out we have an old version of firmware that stores the mac address
in 'mac-address' as a string instead of a byte array. All versions that
use local-mac-address should have it as byte array, so no need to do
string parsing for that case.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

1 files changed, 14 insertions, 3 deletions

diff --git a/drivers/net/pasemi_mac.c b/drivers/net/pasemi_mac.c
index 933d56476894..8d38425e46c3 100644
--- a/drivers/net/pasemi_mac.c
+++ b/drivers/net/pasemi_mac.c
@@ -85,6 +85,7 @@ static int pasemi_get_mac_addr(struct pasemi_mac *mac)
 {
         struct pci_dev *pdev = mac->pdev;
         struct device_node *dn = pci_device_to_OF_node(pdev);
+        int len;
         const u8 *maddr;
         u8 addr[6];
 
@@ -94,9 +95,17 @@ static int pasemi_get_mac_addr(struct pasemi_mac *mac)
                 return -ENOENT;
         }
 
-        maddr = of_get_property(dn, "local-mac-address", NULL);
+        maddr = of_get_property(dn, "local-mac-address", &len);
+
+        if (maddr && len == 6) {
+                memcpy(mac->mac_addr, maddr, 6);
+                return 0;
+        }
+
+        /* Some old versions of firmware mistakenly uses mac-address
+         * (and as a string) instead of a byte array in local-mac-address.
+         */
 
-        /* Fall back to mac-address for older firmware */
         if (maddr == NULL)
                 maddr = of_get_property(dn, "mac-address", NULL);
 
@@ -106,6 +115,7 @@ static int pasemi_get_mac_addr(struct pasemi_mac *mac)
                 return -ENOENT;
         }
 
+
         if (sscanf(maddr, "%hhx:%hhx:%hhx:%hhx:%hhx:%hhx", &addr[0],
                    &addr[1], &addr[2], &addr[3], &addr[4], &addr[5]) != 6) {
                 dev_warn(&pdev->dev,
@@ -113,7 +123,8 @@ static int pasemi_get_mac_addr(struct pasemi_mac *mac)
                 return -EINVAL;
         }
 
-        memcpy(mac->mac_addr, addr, sizeof(addr));
+        memcpy(mac->mac_addr, addr, 6);
+
         return 0;
 }