[PATCH] wifi: rtw88: use firmware MAC address as fallback

[YuChia-Kan]

Some devices provide the Wi-Fi MAC address through firmware instead of
storing a valid address in the chip efuse.

Try to read the MAC address from firmware before falling back to a
randomly generated address.

Signed-off-by: YuChia-Kan <raspberrykan@xxxxxxxxxxxxxx>
---
 drivers/net/wireless/realtek/rtw88/main.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtw88/main.c b/drivers/net/wireless/realtek/rtw88/main.c
index cd9254370fcc..b9d8e0f5d15e 100644
--- a/drivers/net/wireless/realtek/rtw88/main.c
+++ b/drivers/net/wireless/realtek/rtw88/main.c
@@ -2060,8 +2060,12 @@ static int rtw_chip_efuse_info_setup(struct rtw_dev *rtwdev)
 	efuse->ext_lna_5g = efuse->lna_type_5g & BIT(3) ? 1 : 0;
 
 	if (!is_valid_ether_addr(efuse->addr)) {
-		eth_random_addr(efuse->addr);
-		dev_warn(rtwdev->dev, "efuse MAC invalid, using random\n");
+		mac_ret = device_get_mac_address(rtwdev->dev, efuse->addr);
+		if (mac_ret) {
+			eth_random_addr(efuse->addr);
+			dev_warn(rtwdev->dev,
+				 "failed to get valid MAC address, using random\n");
+		}
 	}
 
 out_disable:
-- 
2.53.0