linux-kernel - Re: [PATCH V2 2/2] clocksource: imx-gpt: add necessary kfree to avoid resource leak

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Message-ID: <dea51d27-0957-f762-773f-e0e0e001045c@linaro.org>
Date:   Mon, 5 Nov 2018 14:34:42 +0100
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     Anson Huang <anson.huang@....com>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Cc:     dl-linux-imx <linux-imx@....com>
Subject: Re: [PATCH V2 2/2] clocksource: imx-gpt: add necessary kfree to avoid
 resource leak

Hi Anson,

On 05/11/2018 02:10, Anson Huang wrote:
> kfree should be called to free resource in error path
> before return.
> 
> Signed-off-by: Anson Huang <Anson.Huang@....com>
> ---
>  drivers/clocksource/timer-imx-gpt.c | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/clocksource/timer-imx-gpt.c b/drivers/clocksource/timer-imx-gpt.c
> index a3d6ccb..0f78b30 100644
> --- a/drivers/clocksource/timer-imx-gpt.c
> +++ b/drivers/clocksource/timer-imx-gpt.c
> @@ -477,12 +477,16 @@ static int __init mxc_timer_init_dt(struct device_node *np,  enum imx_gpt_type t
>  		return -ENOMEM;
>  
>  	imxtm->base = of_iomap(np, 0);
> -	if (!imxtm->base)
> +	if (!imxtm->base) {
> +		kfree(imxtm);
>  		return -ENXIO;
> +	}
>  
>  	imxtm->irq = irq_of_parse_and_map(np, 0);
> -	if (imxtm->irq <= 0)
> +	if (imxtm->irq <= 0) {
> +		kfree(imxtm);
>  		return -EINVAL;
> +	}
>  
>  	imxtm->clk_ipg = of_clk_get_by_name(np, "ipg");

Please convert to timer-of API.

Thanks

  -- Daniel


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