[U-Boot] [PATCH] fdt_support: Check for bank size before updating memory node

[Tom Rini <trini@konsulko.com>]

On Thu, Oct 22, 2015 at 08:04:04PM +0530, Lokesh Vutla wrote:

> In case if one of the bank that is passed is of size zero, then u-boot
> will be updating memory node with a bank of size zero. There is not need
> to update memory node if size is zero, so check for bank size before

is not.

> updating.
> 
> Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
> ---
>  common/fdt_support.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/common/fdt_support.c b/common/fdt_support.c
> index f86365e..0019eef 100644
> --- a/common/fdt_support.c
> +++ b/common/fdt_support.c
> @@ -401,6 +401,9 @@ static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size,
>  	char *p = buf;
>  
>  	for (i = 0; i < n; i++) {
> +		if (size[i] == 0)
> +			continue;
> +
>  		if (address_cells == 2)
>  			*(fdt64_t *)p = cpu_to_fdt64(address[i]);
>  		else

So I suggested something along these lines a long while ago as part of
how to fix the problem of DT has correct (and larger than U-Boot can
see) memory size, so I like the change.  But it's a "big" behavior
change that we (I) need to note in the release notes at least.  When I
looked last things were either setting a 0 size or a correct looking
size, but I bet we'll still see a few things drop out wrt incorrect (too
small) memory size being passed.  I wonder what the best list(s) would
be to let everyone know about this would be...

-- 
Tom
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