linux-kernel - Re: [PATCH] clocksource: Freescale: handle of

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Message-ID: <16b737b0-c11c-4b60-a8a6-e3871ded51f2@linaro.org>
Date:   Thu, 8 Sep 2016 13:02:02 +0200
From:   Daniel Lezcano <daniel.lezcano@...aro.org>
To:     Arvind Yadav <arvind.yadav.cs@...il.com>
Cc:     tglx@...utronix.de, linux-kernel@...r.kernel.org,
        Li.Xiubo@...escale.com
Subject: Re: [PATCH] clocksource: Freescale: handle of_iomap failures in
 legacy timer driver

On 30/08/2016 19:09, Arvind Yadav wrote:
> Check return value of of_iomap and handle errors correctly.
> 
> Signed-off-by: Arvind Yadav <arvind.yadav.cs@...il.com>
> ---

Hi Arvind,

usually the undo labels are named like this:

err_unmap_clksrc:

err_unmap_clkevt:

Thanks.

  -- Daniel


>  drivers/clocksource/fsl_ftm_timer.c | 16 ++++++++++------
>  1 file changed, 10 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/clocksource/fsl_ftm_timer.c b/drivers/clocksource/fsl_ftm_timer.c
> index 738515b..c42d159 100644
> --- a/drivers/clocksource/fsl_ftm_timer.c
> +++ b/drivers/clocksource/fsl_ftm_timer.c
> @@ -335,36 +335,40 @@ static int __init ftm_timer_init(struct device_node *np)
>  	priv->clksrc_base = of_iomap(np, 1);
>  	if (!priv->clksrc_base) {
>  		pr_err("ftm: unable to map source timer registers\n");
> -		goto err;
> +		goto err1;
>  	}
>  
>  	ret = -EINVAL;
>  	irq = irq_of_parse_and_map(np, 0);
>  	if (irq <= 0) {
>  		pr_err("ftm: unable to get IRQ from DT, %d\n", irq);
> -		goto err;
> +		goto err2;
>  	}
>  
>  	priv->big_endian = of_property_read_bool(np, "big-endian");
>  
>  	freq = ftm_clk_init(np);
>  	if (!freq)
> -		goto err;
> +		goto err2;
>  
>  	ret = ftm_calc_closest_round_cyc(freq);
>  	if (ret)
> -		goto err;
> +		goto err2;
>  
>  	ret = ftm_clocksource_init(freq);
>  	if (ret)
> -		goto err;
> +		goto err2;
>  
>  	ret = ftm_clockevent_init(freq, irq);
>  	if (ret)
> -		goto err;
> +		goto err2;
>  
>  	return 0;
>  
> +err2:
> +	iounmap(priv->clksrc_base);
> +err1:
> +	iounmap(priv->clkevt_base);
>  err:
>  	kfree(priv);
>  	return ret;
> 


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