linux-kernel - Re: [PATCH V2] PCI: imx6: Do not output error message when devm_clk_get() failed with -EPROBE

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Message-ID: <7148c7a4cad0a7a998f322b71d57669e4658dbf4.camel@pengutronix.de>
Date:   Tue, 11 Aug 2020 10:00:55 +0200
From:   Lucas Stach <l.stach@...gutronix.de>
To:     Anson Huang <Anson.Huang@....com>, hongxing.zhu@....com,
        lorenzo.pieralisi@....com, robh@...nel.org, bhelgaas@...gle.com,
        shawnguo@...nel.org, s.hauer@...gutronix.de, kernel@...gutronix.de,
        festevam@...il.com, linux-pci@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     Linux-imx@....com
Subject: Re: [PATCH V2] PCI: imx6: Do not output error message when
 devm_clk_get() failed with -EPROBE_DEFER

Am Dienstag, den 11.08.2020, 09:29 +0800 schrieb Anson Huang:
> When devm_clk_get() returns -EPROBE_DEFER, i.MX6 PCI driver should
> NOT print error message, use dev_err_probe() to handle it.
> 
> Signed-off-by: Anson Huang <Anson.Huang@....com>

Reviewed-by: Lucas Stach <l.stach@...gutronix.de>

> ---
>  drivers/pci/controller/dwc/pci-imx6.c | 35 +++++++++++++++--------------------
>  1 file changed, 15 insertions(+), 20 deletions(-)
> 
> diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
> index 90df28c..e6d6116 100644
> --- a/drivers/pci/controller/dwc/pci-imx6.c
> +++ b/drivers/pci/controller/dwc/pci-imx6.c
> @@ -1073,38 +1073,33 @@ static int imx6_pcie_probe(struct platform_device *pdev)
>  
>  	/* Fetch clocks */
>  	imx6_pcie->pcie_phy = devm_clk_get(dev, "pcie_phy");
> -	if (IS_ERR(imx6_pcie->pcie_phy)) {
> -		dev_err(dev, "pcie_phy clock source missing or invalid\n");
> -		return PTR_ERR(imx6_pcie->pcie_phy);
> -	}
> +	if (IS_ERR(imx6_pcie->pcie_phy))
> +		return dev_err_probe(dev, PTR_ERR(imx6_pcie->pcie_phy),
> +				     "pcie_phy clock source missing or invalid\n");
>  
>  	imx6_pcie->pcie_bus = devm_clk_get(dev, "pcie_bus");
> -	if (IS_ERR(imx6_pcie->pcie_bus)) {
> -		dev_err(dev, "pcie_bus clock source missing or invalid\n");
> -		return PTR_ERR(imx6_pcie->pcie_bus);
> -	}
> +	if (IS_ERR(imx6_pcie->pcie_bus))
> +		return dev_err_probe(dev, PTR_ERR(imx6_pcie->pcie_bus),
> +				     "pcie_bus clock source missing or invalid\n");
>  
>  	imx6_pcie->pcie = devm_clk_get(dev, "pcie");
> -	if (IS_ERR(imx6_pcie->pcie)) {
> -		dev_err(dev, "pcie clock source missing or invalid\n");
> -		return PTR_ERR(imx6_pcie->pcie);
> -	}
> +	if (IS_ERR(imx6_pcie->pcie))
> +		return dev_err_probe(dev, PTR_ERR(imx6_pcie->pcie),
> +				     "pcie clock source missing or invalid\n");
>  
>  	switch (imx6_pcie->drvdata->variant) {
>  	case IMX6SX:
>  		imx6_pcie->pcie_inbound_axi = devm_clk_get(dev,
>  							   "pcie_inbound_axi");
> -		if (IS_ERR(imx6_pcie->pcie_inbound_axi)) {
> -			dev_err(dev, "pcie_inbound_axi clock missing or invalid\n");
> -			return PTR_ERR(imx6_pcie->pcie_inbound_axi);
> -		}
> +		if (IS_ERR(imx6_pcie->pcie_inbound_axi))
> +			return dev_err_probe(dev, PTR_ERR(imx6_pcie->pcie_inbound_axi),
> +					     "pcie_inbound_axi clock missing or invalid\n");
>  		break;
>  	case IMX8MQ:
>  		imx6_pcie->pcie_aux = devm_clk_get(dev, "pcie_aux");
> -		if (IS_ERR(imx6_pcie->pcie_aux)) {
> -			dev_err(dev, "pcie_aux clock source missing or invalid\n");
> -			return PTR_ERR(imx6_pcie->pcie_aux);
> -		}
> +		if (IS_ERR(imx6_pcie->pcie_aux))
> +			return dev_err_probe(dev, PTR_ERR(imx6_pcie->pcie_aux),
> +					     "pcie_aux clock source missing or invalid\n");
>  		/* fall through */
>  	case IMX7D:
>  		if (dbi_base->start == IMX8MQ_PCIE2_BASE_ADDR)