[PATCH net] net: macb: do not copy the mac address if NULL

[Antoine Tenart]

This patch fixes the MAC address setup in the probe. The MAC address
retrieved using of_get_mac_address was checked for not containing an
error, but it may also be NULL which wasn't tested. Fix it by replacing
IS_ERR with IS_ERR_OR_NULL.

Fixes: 541ddc66d665 ("net: macb: support of_get_mac_address new ERR_PTR error")
Signed-off-by: Antoine Tenart <antoine.ten...@bootlin.com>
---
 drivers/net/ethernet/cadence/macb_main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/cadence/macb_main.c 
b/drivers/net/ethernet/cadence/macb_main.c
index 1241a2a73438..1cd1f2c36d6f 100644
--- a/drivers/net/ethernet/cadence/macb_main.c
+++ b/drivers/net/ethernet/cadence/macb_main.c
@@ -4304,7 +4304,7 @@ static int macb_probe(struct platform_device *pdev)
        if (PTR_ERR(mac) == -EPROBE_DEFER) {
                err = -EPROBE_DEFER;
                goto err_out_free_netdev;
-       } else if (!IS_ERR(mac)) {
+       } else if (!IS_ERR_OR_NULL(mac)) {
                ether_addr_copy(bp->dev->dev_addr, mac);
        } else {
                macb_get_hwaddr(bp);
-- 
2.21.0