Re: [PATCH -next] gpio: Fix return value check in owl_gpio_probe()

[Manivannan Sadhasivam <manivannan.sadhasivam@xxxxxxxxxx>]

Hi Wei,

Thanks for the patch.

On Mon, May 07, 2018 at 01:40:24AM +0000, Wei Yongjun wrote:
> In case of error, the function of_iomap() returns NULL pointer not
> ERR_PTR(). The IS_ERR() test in the return value check should be
> replaced with NULL test.
> 
> Fixes: d3654d38809c ("gpio: Add gpio driver for Actions OWL S900 SoC")
> Signed-off-by: Wei Yongjun <weiyongjun1@xxxxxxxxxx>
> ---
>  drivers/gpio/gpio-owl.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpio/gpio-owl.c b/drivers/gpio/gpio-owl.c
> index 3546362..f35e80f 100644
> --- a/drivers/gpio/gpio-owl.c
> +++ b/drivers/gpio/gpio-owl.c
> @@ -128,8 +128,8 @@ static int owl_gpio_probe(struct platform_device *pdev)
>  		return -ENOMEM;
>  
>  	gpio->base = of_iomap(dev->of_node, 0);
> -	if (IS_ERR(gpio->base))
> -		return PTR_ERR(gpio->base);
> +	if (!gpio->base)
> +		return -ENOMEM;
> 

Agree with the check here. But the return value should be -ENXIO?

Regards,
Mani

>  	/*
>  	 * Get the number of gpio's for this bank. If none specified,
> 
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