linux-kernel - Re: [PATCH] ata: sata_mv: aspeed: fix value check in mv_platform

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Message-ID: <ZSPSDcPY5c1UzrM2@x1-carbon>
Date:   Mon, 9 Oct 2023 10:12:35 +0000
From:   Niklas Cassel <Niklas.Cassel@....com>
To:     Ma Ke <make_ruc2021@....com>
CC:     "dlemoal@...nel.org" <dlemoal@...nel.org>,
        "linux-ide@...r.kernel.org" <linux-ide@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ata: sata_mv: aspeed: fix value check in
 mv_platform_probe()

On Sat, Oct 07, 2023 at 03:26:57PM +0800, Ma Ke wrote:
> In mv_platform_probe(), check the return value of clk_prepare_enable()
> and return the error code if clk_prepare_enable() returns an
> unexpected value.
> 
> Signed-off-by: Ma Ke <make_ruc2021@....com>
> ---
>  drivers/ata/sata_mv.c | 7 +++++--
>  1 file changed, 5 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/ata/sata_mv.c b/drivers/ata/sata_mv.c
> index 45e48d653c60..96f9841aae6c 100644
> --- a/drivers/ata/sata_mv.c
> +++ b/drivers/ata/sata_mv.c
> @@ -4125,8 +4125,11 @@ static int mv_platform_probe(struct platform_device *pdev)
>  	hpriv->clk = clk_get(&pdev->dev, NULL);
>  	if (IS_ERR(hpriv->clk))
>  		dev_notice(&pdev->dev, "cannot get optional clkdev\n");
> -	else
> -		clk_prepare_enable(hpriv->clk);
> +	else {
> +		rc = clk_prepare_enable(hpriv->clk);
> +		if (rc)
> +			return rc;

Don't you also need to call clk_put() to undo the clk_get()?

Can this error path perhaps simply do a goto err?


Kind regards,
Niklas