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net: dsa: return early if there is no master

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It doesn't make sense to have DSA without a master port. Error out early
if there is no master port.

Fixes: fc054d563b ("net: Introduce DSA class for Ethernet switches")
Signed-off-by: Michael Walle <michael@walle.cc>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
This commit is contained in:
Michael Walle 2021-02-24 17:40:39 +01:00 committed by Priyanka Jain
parent 6ce33e2288
commit a02dcbbb5a
1 changed files with 4 additions and 4 deletions
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8
net/dsa-uclass.c
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@ -280,6 +280,10 @@ static int dsa_port_probe(struct udevice *pdev)
if (!port_pdata->phy)
return -ENODEV;
master = dsa_get_master(dev);
if (!master)
return -ENODEV;
/*
* Inherit port's hwaddr from the DSA master, unless the port already
* has a unique MAC address specified in the environment.
@ -288,10 +292,6 @@ static int dsa_port_probe(struct udevice *pdev)
if (!is_zero_ethaddr(env_enetaddr))
return 0;
master = dsa_get_master(dev);
if (!master)
return 0;
master_pdata = dev_get_plat(master);
eth_pdata = dev_get_plat(pdev);
memcpy(eth_pdata->enetaddr, master_pdata->enetaddr, ARP_HLEN);