Re: [patch] PM / devfreq: exynos-nocp: Checking for IS_ERR instead of NULL

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On Wed, 25 May 2016, Chanwoo Choi wrote:

> On 2016년 05월 18일 19:37, Dan Carpenter wrote:
> > The platform_get_resource() function returns NULL on error, it never
> > returns error pointers.
> >
> > Fixes: 0179a913875a ('PM / devfreq: event: Add new Exynos NoC probe driver')
> > Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
> >
> > diff --git a/drivers/devfreq/event/exynos-nocp.c b/drivers/devfreq/event/exynos-nocp.c
> > index 6b6a5f3..03b35d5 100644
> > --- a/drivers/devfreq/event/exynos-nocp.c
> > +++ b/drivers/devfreq/event/exynos-nocp.c
> > @@ -220,8 +220,8 @@ static int exynos_nocp_parse_dt(struct platform_device *pdev,
> >
> >  	/* Maps the memory mapped IO to control nocp register */
> >  	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> > -	if (IS_ERR(res))
> > -		return PTR_ERR(res);
> > +	if (!res)
> > +		return -ENXIO;
> >
> >  	base = devm_ioremap_resource(dev, res);
> >  	if (IS_ERR(base))
>
> Looks good to me.

I believe that there is no need for the test at all.
devm_ioremap_resource should make the test.

julia

>
> Reviewed-by: Chanwoo Choi <cw00.choi@xxxxxxxxxxx>
>
> Thanks,
> Chanwoo Choi
>
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