[PATCH net 4/4] octeon_ep: ensure get mac address successfully before eth_hw_addr_set()

[Ziyang Xuan]

octep_get_mac_addr() can fail because send mbox message failed. If this
happens, octep_dev->mac_addr will be zero. It should not continue to
initialize. Add exception handling for octep_get_mac_addr() to fix it.

Fixes: 862cd659a6fb ("octeon_ep: Add driver framework and device initialization")
Signed-off-by: Ziyang Xuan <william.xuanziyang@xxxxxxxxxx>
---
 drivers/net/ethernet/marvell/octeon_ep/octep_main.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/marvell/octeon_ep/octep_main.c b/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
index 53f288c32238..b45dd7f04e21 100644
--- a/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
+++ b/drivers/net/ethernet/marvell/octeon_ep/octep_main.c
@@ -1072,7 +1072,11 @@ static int octep_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	netdev->max_mtu = OCTEP_MAX_MTU;
 	netdev->mtu = OCTEP_DEFAULT_MTU;
 
-	octep_get_mac_addr(octep_dev, octep_dev->mac_addr);
+	err = octep_get_mac_addr(octep_dev, octep_dev->mac_addr);
+	if (err) {
+		dev_err(&pdev->dev, "Failed to get mac address\n");
+		goto register_dev_err;
+	}
 	eth_hw_addr_set(netdev, octep_dev->mac_addr);
 
 	err = register_netdev(netdev);
-- 
2.25.1