On Aug 18 2020, YueHaibing wrote:
> The "plat->phy_interface" variable is an enum and in this context GCC
> will treat it as an unsigned int so the error handling is never
> triggered.
>
> Fixes: b9f0b2f634c0 ("net: stmmac: platform: fix probe for ACPI devices")
> Signed-off-by: YueHaibing <[email protected]>
> ---
> drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> index f32317fa75c8..b5b558b02e7d 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
> @@ -413,7 +413,7 @@ stmmac_probe_config_dt(struct platform_device *pdev,
> const char **mac)
> }
>
> plat->phy_interface = device_get_phy_mode(&pdev->dev);
> - if (plat->phy_interface < 0)
> + if ((int)plat->phy_interface < 0)
> return ERR_PTR(plat->phy_interface);
I don't think the conversion to long when passed to ERR_PTR will produce
a negative value either (if long is wider than unsigned int).
Andreas.
--
Andreas Schwab, [email protected]
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