From a02dcbbb5a8e24a3f6cd3e7f158e1953b82d5e2e Mon Sep 17 00:00:00 2001 From: Michael Walle Date: Wed, 24 Feb 2021 17:40:39 +0100 Subject: [PATCH] net: dsa: return early if there is no master It doesn't make sense to have DSA without a master port. Error out early if there is no master port. Fixes: fc054d563bfb ("net: Introduce DSA class for Ethernet switches") Signed-off-by: Michael Walle Reviewed-by: Vladimir Oltean Reviewed-by: Ramon Fried Reviewed-by: Priyanka Jain --- net/dsa-uclass.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/net/dsa-uclass.c b/net/dsa-uclass.c index 2ce9ddb90d..88a8ea9352 100644 --- a/net/dsa-uclass.c +++ b/net/dsa-uclass.c @@ -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);