[PATCH master 1/3] resource: return NULL for error in request_barebox_region

[Marco Felsch]

Hi Ahmad,

On 24-07-22, Ahmad Fatoum wrote:
> The function currently returns NULL for error if the range is in SDRAM
> and couldn't be requested or an error pointer if the range is outside.
> 
> Reduce the confusion by using only one way to indicate error. As
> request_barebox_region is used to replace request_sdram_region calls and
> that returns NULL on error, follow suit.
> 
> Signed-off-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
> ---
>  common/memory.c | 9 ++++++---
>  1 file changed, 6 insertions(+), 3 deletions(-)
> 
> diff --git a/common/memory.c b/common/memory.c
> index eb7838d03613..c155cb317f25 100644
> --- a/common/memory.c
> +++ b/common/memory.c
> @@ -84,9 +84,12 @@ struct resource *request_barebox_region(const char *name,
>  	resource_size_t end = start + size - 1;
>  
>  	if (barebox_res && barebox_res->start <= start &&
> -	    end <= barebox_res->end)
> -		return __request_region(barebox_res, start, end,
> -					name, IORESOURCE_MEM);
> +	    end <= barebox_res->end) {
> +		struct resource *iores;
> +		iores = __request_region(barebox_res, start, end,
> +					 name, IORESOURCE_MEM);
> +		return !IS_ERR(iores) ? iores : NULL;

Of course a nit but IMHO

   		return IS_ERR(iores) ? NULL : iores;

is easier to read.

Regards,
  Marco

> +	}
>  
>  	return request_sdram_region(name, start, size);
>  }
> -- 
> 2.39.2
> 
> 
>