linux-kernel - Re: [PATCH v2 5/5] PCI: uniphier: Add error message when failed to get phy

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Date:   Mon, 1 Jun 2020 15:43:02 -0600
From:   Rob Herring <robh@...nel.org>
To:     Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
Cc:     Bjorn Helgaas <bhelgaas@...gle.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Jingoo Han <jingoohan1@...il.com>,
        Gustavo Pimentel <gustavo.pimentel@...opsys.com>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        linux-pci@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Masami Hiramatsu <masami.hiramatsu@...aro.org>,
        Jassi Brar <jaswinder.singh@...aro.org>
Subject: Re: [PATCH v2 5/5] PCI: uniphier: Add error message when failed to
 get phy

On Fri, May 15, 2020 at 06:59:03PM +0900, Kunihiko Hayashi wrote:
> Even if phy driver doesn't probe, the error message can't be distinguished
> from other errors. This displays error message caused by the phy driver
> explicitly.
> 
> Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@...ionext.com>
> ---
>  drivers/pci/controller/dwc/pcie-uniphier.c | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/pci/controller/dwc/pcie-uniphier.c b/drivers/pci/controller/dwc/pcie-uniphier.c
> index 493f105..7ae9688 100644
> --- a/drivers/pci/controller/dwc/pcie-uniphier.c
> +++ b/drivers/pci/controller/dwc/pcie-uniphier.c
> @@ -468,8 +468,11 @@ static int uniphier_pcie_probe(struct platform_device *pdev)
>  		return PTR_ERR(priv->rst);
>  
>  	priv->phy = devm_phy_optional_get(dev, "pcie-phy");
> -	if (IS_ERR(priv->phy))
> -		return PTR_ERR(priv->phy);
> +	if (IS_ERR(priv->phy)) {
> +		ret = PTR_ERR(priv->phy);
> +		dev_err(dev, "Failed to get phy (%d)\n", ret);

This will print an error on EPROBE_DEFERRED which isn't an error.

> +		return ret;
> +	}
>  
>  	platform_set_drvdata(pdev, priv);
>  
> -- 
> 2.7.4
>