Re: [PATCH v6 04/13] PCI: brcmstb: Use common error handling code in brcm_pcie_probe()

[Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>]

On Thu, Aug 15, 2024 at 06:57:17PM -0400, Jim Quinlan wrote:
> Refactor the error handling in the bottom half of the probe
> function for readability.  The invocation of clk_prepare_enable()
> is moved lower in the function and this simplifies a couple
> of return paths.  dev_err_probe() is also used when it is apt.
> 
> Signed-off-by: Jim Quinlan <james.quinlan@broadcom.com>

Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>

> ---
>  drivers/pci/controller/pcie-brcmstb.c | 25 ++++++++++++-------------
>  1 file changed, 12 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/pci/controller/pcie-brcmstb.c b/drivers/pci/controller/pcie-brcmstb.c
> index c08683febdd4..790a149f6581 100644
> --- a/drivers/pci/controller/pcie-brcmstb.c
> +++ b/drivers/pci/controller/pcie-brcmstb.c
> @@ -1613,25 +1613,23 @@ static int brcm_pcie_probe(struct platform_device *pdev)
>  
>  	pcie->ssc = of_property_read_bool(np, "brcm,enable-ssc");
>  
> -	ret = clk_prepare_enable(pcie->clk);
> -	if (ret) {
> -		dev_err(&pdev->dev, "could not enable clock\n");
> -		return ret;
> -	}
>  	pcie->rescal = devm_reset_control_get_optional_shared(&pdev->dev, "rescal");
> -	if (IS_ERR(pcie->rescal)) {
> -		clk_disable_unprepare(pcie->clk);
> +	if (IS_ERR(pcie->rescal))
>  		return PTR_ERR(pcie->rescal);
> -	}
> +
>  	pcie->perst_reset = devm_reset_control_get_optional_exclusive(&pdev->dev, "perst");
> -	if (IS_ERR(pcie->perst_reset)) {
> -		clk_disable_unprepare(pcie->clk);
> +	if (IS_ERR(pcie->perst_reset))
>  		return PTR_ERR(pcie->perst_reset);
> -	}
>  
> -	ret = reset_control_reset(pcie->rescal);
> +	ret = clk_prepare_enable(pcie->clk);
>  	if (ret)
> -		dev_err(&pdev->dev, "failed to deassert 'rescal'\n");
> +		return dev_err_probe(&pdev->dev, ret, "could not enable clock\n");
> +
> +	ret = reset_control_reset(pcie->rescal);
> +	if (ret) {
> +		clk_disable_unprepare(pcie->clk);
> +		return dev_err_probe(&pdev->dev, ret, "failed to deassert 'rescal'\n");
> +	}
>  
>  	ret = brcm_phy_start(pcie);
>  	if (ret) {
> @@ -1678,6 +1676,7 @@ static int brcm_pcie_probe(struct platform_device *pdev)
>  
>  fail:
>  	__brcm_pcie_remove(pcie);
> +

Irrelevant change in this patch.

- Mani

>  	return ret;
>  }
>  
> -- 
> 2.17.1
> 

-- 
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