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net: stmmac: failure to probe without MAC interface specified

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Alexander Stein reports that commit a014c35556 ("net: stmmac: clarify
difference between "interface" and "phy_interface"") caused breakage,
because plat->mac_interface will never be negative. Fix this by using
the "rc" temporary variable in stmmac_probe_config_dt().

Reported-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Tested-by: Alexander Stein <alexander.stein@ew.tq-group.com>
Link: https://lore.kernel.org/r/E1qayn0-006Q8J-GE@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Russell King (Oracle) 2023-08-29 14:29:50 +01:00 • committed by Jakub Kicinski
parent e4da8c7897
commit b5947239bf
1 changed files with 2 additions and 3 deletions
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5
drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
View file

@ -419,9 +419,8 @@ stmmac_probe_config_dt(struct platform_device *pdev, u8 *mac)
return ERR_PTR(phy_mode);
plat->phy_interface = phy_mode;
plat->mac_interface = stmmac_of_get_mac_mode(np);
if (plat->mac_interface < 0)
plat->mac_interface = plat->phy_interface;
rc = stmmac_of_get_mac_mode(np);
plat->mac_interface = rc < 0 ? plat->phy_interface : rc;
/* Some wrapper drivers still rely on phy_node. Let's save it while
* they are not converted to phylink. */