r8152: load the default MAC address

Except for RTL_VER_01, replace loading the MAC address from PLA_IDR
with from PLA_BACKUP. The default MAC address may be modified by
the other OS, so the PLA_IDR may be not the default MAC address.

The data in the PLA_BACKUP address of the RTL_VER_01 may be destoryed,
so load MAC address from PLA_IDR for RTL_VER_01.

Signed-off-by: Hayes Wang <hayeswang@realtek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 17 insertions, 2 deletions

diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index 4888e4f4dd8f..3847c3507624 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -889,11 +889,26 @@ int r8152_submit_rx(struct r8152 *tp, struct rx_agg *agg, gfp_t mem_flags);
 static inline void set_ethernet_addr(struct r8152 *tp)
 {
         struct net_device *dev = tp->netdev;
+        int ret;
         u8 node_id[8] = {0};
 
-        if (pla_ocp_read(tp, PLA_IDR, sizeof(node_id), node_id) < 0)
+        if (tp->version == RTL_VER_01)
+                ret = pla_ocp_read(tp, PLA_IDR, sizeof(node_id), node_id);
+        else
+                ret = pla_ocp_read(tp, PLA_BACKUP, sizeof(node_id), node_id);
+
+        if (ret < 0) {
                 netif_notice(tp, probe, dev, "inet addr fail\n");
-        else {
+        } else {
+                if (tp->version != RTL_VER_01) {
+                        ocp_write_byte(tp, MCU_TYPE_PLA, PLA_CRWECR,
+                                       CRWECR_CONFIG);
+                        pla_ocp_write(tp, PLA_IDR, BYTE_EN_SIX_BYTES,
+                                      sizeof(node_id), node_id);
+                        ocp_write_byte(tp, MCU_TYPE_PLA, PLA_CRWECR,
+                                       CRWECR_NORAML);
+                }
+
                 memcpy(dev->dev_addr, node_id, dev->addr_len);
                 memcpy(dev->perm_addr, dev->dev_addr, dev->addr_len);
         }