From: Heiner Kallweit hkallweit1@gmail.com
[ Upstream commit 1f3bd64ad921f051254591fbed04fd30b306cde6 ]
In a number of cases the driver assigns a default value of -1 to priv->plat->phy_addr. This may result in calling mdiobus_get_phy() with addr parameter being -1. Therefore check for this scenario and bail out before calling mdiobus_get_phy().
Fixes: 42e87024f727 ("net: stmmac: Fix case when PHY handle is not present") Signed-off-by: Heiner Kallweit hkallweit1@gmail.com Link: https://lore.kernel.org/r/669f9671-ecd1-a41b-2727-7b73e3003985@gmail.com Signed-off-by: Paolo Abeni pabeni@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c index 15b0daf416f3..4191502d6472 100644 --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c @@ -1242,6 +1242,11 @@ static int stmmac_init_phy(struct net_device *dev) int addr = priv->plat->phy_addr; struct phy_device *phydev;
+ if (addr < 0) { + netdev_err(priv->dev, "no phy found\n"); + return -ENODEV; + } + phydev = mdiobus_get_phy(priv->mii, addr); if (!phydev) { netdev_err(priv->dev, "no phy at addr %d\n", addr);