[U-Boot] [PATCH v3 1/3] net: eth: Clear MAC address in eth_pre_remove()

[Bin Meng]

platdata->enetaddr was assigned to a value in dev_probe() last time.
If we don't clear it, for dev_probe() at the second time, dm eth
will end up treating it as a MAC address from ROM no matter where it
came from originally (maybe env, ROM, or even random). Fix this by
clearing platdata->enetaddr when removing an Ethernet device.

Signed-off-by: Bin Meng <bmeng.cn at gmail.com>

---

Changes in v3:
- Update commit message to mention the reason of why

Changes in v2:
- New patch to clear MAC address in eth_pre_remove()

 net/eth.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/net/eth.c b/net/eth.c
index 2e24b55..0d66f33 100644
--- a/net/eth.c
+++ b/net/eth.c
@@ -575,8 +575,13 @@ static int eth_post_probe(struct udevice *dev)
 
 static int eth_pre_remove(struct udevice *dev)
 {
+	struct eth_pdata *pdata = dev->platdata;
+
 	eth_get_ops(dev)->stop(dev);
 
+	/* clear the MAC address */
+	memset(pdata->enetaddr, 0, 6);
+
 	return 0;
 }
 
-- 
1.8.2.1