linux-kernel - Re: [PATCH] PCI: dwc/meson: Use PTR_ERR_OR

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Message-ID: <b28005c3-de6d-79db-34e6-b5298b9f0224@baylibre.com>
Date:   Tue, 17 Nov 2020 09:36:06 +0100
From:   Neil Armstrong <narmstrong@...libre.com>
To:     Sudip Mukherjee <sudipm.mukherjee@...il.com>,
        Yue Wang <yue.wang@...ogic.com>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Rob Herring <robh@...nel.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Kevin Hilman <khilman@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>
Cc:     linux-kernel@...r.kernel.org, linux-safety@...ts.elisa.tech,
        linux-pci@...r.kernel.org, linux-amlogic@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH] PCI: dwc/meson: Use PTR_ERR_OR_ZERO

On 16/11/2020 17:34, Sudip Mukherjee wrote:
> Coccinelle suggested using PTR_ERR_OR_ZERO() and looking at the code,
> we can use PTR_ERR_OR_ZERO() instead of checking IS_ERR() and then
> doing 'return 0'.
> 
> Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@...il.com>
> ---
>  drivers/pci/controller/dwc/pci-meson.c | 8 ++------
>  1 file changed, 2 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/pci/controller/dwc/pci-meson.c b/drivers/pci/controller/dwc/pci-meson.c
> index 1913dc2c8fa0..f4261f5aceb1 100644
> --- a/drivers/pci/controller/dwc/pci-meson.c
> +++ b/drivers/pci/controller/dwc/pci-meson.c
> @@ -115,10 +115,8 @@ static int meson_pcie_get_mems(struct platform_device *pdev,
>  		return PTR_ERR(pci->dbi_base);
>  
>  	mp->cfg_base = devm_platform_ioremap_resource_byname(pdev, "cfg");
> -	if (IS_ERR(mp->cfg_base))
> -		return PTR_ERR(mp->cfg_base);
>  
> -	return 0;
> +	return PTR_ERR_OR_ZERO(mp->cfg_base);
>  }
>  
>  static int meson_pcie_power_on(struct meson_pcie *mp)
> @@ -208,10 +206,8 @@ static int meson_pcie_probe_clocks(struct meson_pcie *mp)
>  		return PTR_ERR(res->general_clk);
>  
>  	res->clk = meson_pcie_probe_clock(dev, "pclk", 0);
> -	if (IS_ERR(res->clk))
> -		return PTR_ERR(res->clk);
>  
> -	return 0;
> +	return PTR_ERR_OR_ZERO(res->clk);
>  }
>  
>  static inline u32 meson_cfg_readl(struct meson_pcie *mp, u32 reg)
> 

Hi,

This has been nacked multiple times already:
https://lore.kernel.org/linux-pci/20190527140952.GB7202@ulmo/

Neil