[PATCH] net: eth-uclass: Setup ROM source only when ROM reading passes

[Michal Simek]

There is no reason to setup ROM source if read_rom_hwaddr hook doesn't
exist or reading mac address fails. It is ending up with confusion about
mac address source.

It is nicely visible if you put mac address to DT as
local-mac-address = [ff ff ff ff ff ff];
but also save ethaddr to variables
setenv -f ethaddr 02:18:31:7e:3e:01

Before this patch U-Boot prints that source is DT
Address in ROM is		ff:ff:ff:ff:ff:ff
Address in environment is	02:18:31:7e:3e:01

After that source is DT:
Address in DT is		ff:ff:ff:ff:ff:ff
Address in environment is	02:18:31:7e:3e:01

Signed-off-by: Michal Simek <michal.simek at amd.com>
---

 net/eth-uclass.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/net/eth-uclass.c b/net/eth-uclass.c
index c393600fabcd..e40b869e1c31 100644
--- a/net/eth-uclass.c
+++ b/net/eth-uclass.c
@@ -588,10 +588,14 @@ static int eth_post_probe(struct udevice *dev)
 	/* Check if the device has a valid MAC address in device tree */
 	if (!eth_dev_get_mac_address(dev, pdata->enetaddr) ||
 	    !is_valid_ethaddr(pdata->enetaddr)) {
-		source = "ROM";
 		/* Check if the device has a MAC address in ROM */
-		if (eth_get_ops(dev)->read_rom_hwaddr)
-			eth_get_ops(dev)->read_rom_hwaddr(dev);
+		if (eth_get_ops(dev)->read_rom_hwaddr) {
+			int ret;
+
+			ret = eth_get_ops(dev)->read_rom_hwaddr(dev);
+			if (!ret)
+				source = "ROM";
+		}
 	}
 
 	eth_env_get_enetaddr_by_index("eth", dev_seq(dev), env_enetaddr);
-- 
2.36.1