[U-Boot] [PATCH] Fix condition where bootm_size not set and wrong memory size reported

[Sergei Shtylyov <sshtylyov@mvista.com>]

Hello.

Matthew McClintock wrote:

> If the user sets bootm_low and does not set bootm_size, u-boot will
> report the memory node in the flat device tree incorrectly. Instead
> of reporting the remaining size of memory, it will report the total
> available memory which is incorrect.

> Specifically this fixes the situation when booting a relocatable
> kernel and the memory is reported as an offset and size in the
> device tree, and the size needs to be adjusted accordingly.

> Signed-off-by: Matthew McClintock <msm@freescale.com>
> ---
>  common/image.c |   12 +++++++++---
>  1 files changed, 9 insertions(+), 3 deletions(-)
> 
> diff --git a/common/image.c b/common/image.c
> index 2b6007e..bf2acb0 100644
> --- a/common/image.c
> +++ b/common/image.c
> @@ -433,17 +433,23 @@ ulong getenv_bootm_low(void)
>  
>  phys_size_t getenv_bootm_size(void)
>  {
> +	phys_size_t tmp;
>  	char *s = getenv ("bootm_size");
>  	if (s) {
> -		phys_size_t tmp;
>  		tmp = (phys_size_t)simple_strtoull (s, NULL, 16);
>  		return tmp;
>  	}
> +	s = getenv("bootm_low");
> +	if (s)
> +		tmp = (phys_size_t)simple_strtoull (s, NULL, 16);
> +	else
> +		tmp = 0;
> +
>  
>  #if defined(CONFIG_ARM)
> -	return gd->bd->bi_dram[0].size;
> +	return (gd->bd->bi_dram[0].size - tmp);
>  #else
> -	return gd->bd->bi_memsize;
> +	return (gd->bd->bi_memsize - tmp);

    Parens not useful here and above.

WBR, Sergei