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net: dwmac-sun8i: fix a missing check of of_get_phy_mode 

of_get_phy_mode may fail and return a negative error code;
the fix checks the return value of of_get_phy_mode and
returns -EINVAL of it fails.

Signed-off-by: Kangjie Lu <kjlu@umn.edu>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Kangjie Lu 2019-03-12 02:50:40 -05:00 committed by David S. Miller
parent 035a14e71f
commit 4ec850e5df
1 changed files with 4 additions and 1 deletions
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5
drivers/net/ethernet/stmicro/stmmac/dwmac-sun8i.c
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@ -1147,7 +1147,10 @@ static int sun8i_dwmac_probe(struct platform_device *pdev)
return ret;
}
plat_dat->interface = of_get_phy_mode(dev->of_node);
ret = of_get_phy_mode(dev->of_node);
if (ret < 0)
return -EINVAL;
plat_dat->interface = ret;
/* platform data specifying hardware features and callbacks.
* hardware features were copied from Allwinner drivers.