[U-Boot] [PATCH] efi_loader: fix bug in efi_get_memory_map

[Brüns, Stefan]

On Mittwoch, 26. Juli 2017 22:25:29 CEST Rob Clark wrote:
> On Wed, Jul 26, 2017 at 4:10 PM, Alexander Graf <agraf at suse.de> wrote:
> > On 26.07.17 20:34, Rob Clark wrote:
> >> When booting shim -> fallback -> shim -> grub -> linux the memory map is
> >> a bit larger than the size linux passes in on the first call.  But in
> >> the EFI_BUFFER_TOO_SMALL case we were not passing back the updated size
> >> to linux so it would loop forever.
> >> 
> >> Signed-off-by: Rob Clark <robdclark at gmail.com>
> > 
> > The spec is actually very explicit about this case. It says in the
> > EFI_BUFFER_TOO_SMALL case, we *have* to return the map size.
> 
> yes, that is what I fixed.  We *weren't* returning the required buffer
> size before :-)

Sigh, yes, this was correct in the first 3 versions of the patch series, but 
unfortunately broken in v4 which was actually committed ...

See: https://lists.denx.de/pipermail/u-boot/2016-October/268766.html

Actually, the map_size variable is no longer needed, if you assign to 
*memory_map_size directly.

Anyway, this patch is:
Reviewed-by: Stefan Brüns <stefan.bruens at rwth-aachen.de>

Kind regards,

Stefan