linux-kernel - Re: [PATCH] clk/ti/adpll: Add a NULL check for devm

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Date:   Sun, 17 May 2020 20:55:30 -0700
From:   Joe Perches <joe@...ches.com>
To:     Xu Wang <vulab@...as.ac.cn>, t-kristo@...com,
        mturquette@...libre.com, sboyd@...nel.org,
        linux-omap@...r.kernel.org, linux-clk@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org
Subject: Re: [PATCH] clk/ti/adpll: Add a NULL check for devm_kasprintf()

On Mon, 2020-05-18 at 03:46 +0000, Xu Wang wrote:
> devm_kasprintf() may fail, so we should better add a NULL check
> and propagate an error on failure.

You didn't compile this.

All the return values of this function are already checked.

> Signed-off-by: Xu Wang <vulab@...as.ac.cn>
> ---
>  drivers/clk/ti/adpll.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/clk/ti/adpll.c b/drivers/clk/ti/adpll.c
> index bb2f283..f18a672 100644
> --- a/drivers/clk/ti/adpll.c
> +++ b/drivers/clk/ti/adpll.c
> @@ -196,6 +196,8 @@ static const char *ti_adpll_clk_get_name(struct ti_adpll_data *d,
>  	} else {
>  		name = devm_kasprintf(d->dev, GFP_KERNEL, "%08lx.adpll.%s",
>  				      d->pa, postfix);
> +		if (!name)
> +			return -ENOMEM;
>  	}
>  
>  	return name;