[PATCH net-next v1 13/21] net: usb: lan78xx: Add error handling to lan78xx_set_mac_addr

[Oleksij Rempel]

Update `lan78xx_set_mac_addr` to handle errors during MAC address
register write operations. Ensure that errors are properly propagated to
the caller, improving the robustness of MAC address updates.

Signed-off-by: Oleksij Rempel <o.rempel@xxxxxxxxxxxxxx>
---
 drivers/net/usb/lan78xx.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c
index 26dc43bac84b..5d318ff8b33d 100644
--- a/drivers/net/usb/lan78xx.c
+++ b/drivers/net/usb/lan78xx.c
@@ -2763,6 +2763,7 @@ static int lan78xx_set_mac_addr(struct net_device *netdev, void *p)
 	struct lan78xx_net *dev = netdev_priv(netdev);
 	struct sockaddr *addr = p;
 	u32 addr_lo, addr_hi;
+	int ret;
 
 	if (netif_running(netdev))
 		return -EBUSY;
@@ -2779,14 +2780,20 @@ static int lan78xx_set_mac_addr(struct net_device *netdev, void *p)
 	addr_hi = netdev->dev_addr[4] |
 		  netdev->dev_addr[5] << 8;
 
-	lan78xx_write_reg(dev, RX_ADDRL, addr_lo);
-	lan78xx_write_reg(dev, RX_ADDRH, addr_hi);
+	ret = lan78xx_write_reg(dev, RX_ADDRL, addr_lo);
+	if (ret < 0)
+		return ret;
+
+	ret = lan78xx_write_reg(dev, RX_ADDRH, addr_hi);
+	if (ret < 0)
+		return ret;
 
 	/* Added to support MAC address changes */
-	lan78xx_write_reg(dev, MAF_LO(0), addr_lo);
-	lan78xx_write_reg(dev, MAF_HI(0), addr_hi | MAF_HI_VALID_);
+	ret = lan78xx_write_reg(dev, MAF_LO(0), addr_lo);
+	if (ret < 0)
+		return ret;
 
-	return 0;
+	return lan78xx_write_reg(dev, MAF_HI(0), addr_hi | MAF_HI_VALID_);
 }
 
 /* Enable or disable Rx checksum offload engine */
-- 
2.39.5