[PATCH] efi_loader: Allow also empty capsule to be process

[Michal Simek]

On 7/18/23 17:41, Heinrich Schuchardt wrote:
> On 13.07.23 16:35, Michal Simek wrote:
>> Empty capsule are also allowed to be process. Without it updated images
>> can't change their Image Acceptance state from no to yes.
> 
> Is there any documentation describing the usage of empty capsule to set
> the image acceptance state?

I actually don't know about documentation. I was talking to Ilias to make sure 
that documentation is up2date because there are missing couple of things there.

I am testing A/B update and if you setup oemflags to 0x8000 then capsules are 
not automatically accepted and waiting for acceptance capsule to be passed.
When I tested it I found out that they are not process that's why I created this 
patch. But definitely someone should check that logic that the patch is right 
based on intention how these empty capsules should be used.
I am actually not quite sure how revert capsules should be used and how to 
revert only certain image if you use multiple images in the same bank.

Thanks,
Michal