Re: [PATCH 1/3] net: stmmac: dwmac-qcom-ethqos: Return device_get_phy_mode() errors properly

[Andrew Lunn]

On Thu, Jun 29, 2023 at 02:14:16PM -0500, Andrew Halaney wrote:
> Other than -ENODEV, other errors resulted in -EINVAL being returned
> instead of the actual error.
> 
> Signed-off-by: Andrew Halaney <ahalaney@xxxxxxxxxx>
> ---
>  drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c | 5 +++--
>  1 file changed, 3 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
> index e62940414e54..3bf025e8e2bd 100644
> --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
> +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c
> @@ -721,6 +721,9 @@ static int qcom_ethqos_probe(struct platform_device *pdev)
>  		return -ENOMEM;
>  
>  	ethqos->phy_mode = device_get_phy_mode(dev);
> +	if (ethqos->phy_mode < 0)
> +		return dev_err_probe(dev, ethqos->phy_mode,
> +				     "Failed to get phy mode\n");

If this every used on anything other than device tree?

of_get_phy_mode() has a better API, there is a clear separation of the
return value indicating success/fail, and the interface mode found in
DT. You can then change phy_mode in struct qcom_ethqos to be
phy_interface_t.

	Andrew