Hi Igor,

Thanks for the fix. See my comments below.

On Thu, Jul 12, 2018 at 10:34:24AM +0300, Igor Opaniuk wrote:
> Provide proper dependencies for LIBAVB: (FASTBOOT and !BLK):
> 1. CONFIG_FASTBOOT is needed, as fastboot buffer is re-used (which
> is initially used in the fastboot protocol for downloads)
> 2. !CONFIG_BLK, as current implementation currently
> doesn't support non-legacy block API.
> 
> Reported-by: Eugeniu Rosca <[email protected]>
> Signed-off-by: Igor Opaniuk <[email protected]>
> ---
>  lib/Kconfig | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/lib/Kconfig b/lib/Kconfig
> index a77bf1c..4780e7e 100644
> --- a/lib/Kconfig
> +++ b/lib/Kconfig
> @@ -191,7 +191,7 @@ menu "Android Verified Boot"
>  
>  config LIBAVB
>       bool "Android Verified Boot 2.0 support"
> -     depends on ANDROID_BOOT_IMAGE
> +     depends on ANDROID_BOOT_IMAGE && FASTBOOT && !BLK

Since libavb library alone is highly portable (it compiles fine with
several compilers), I'm not sure if's the best choice to make it
dependent on FASTBOOT (obviously it is not dependent on it). The
dependency is rather introduced by commit 3af30e4443aa ("avb2.0:
implement AVB ops"), which re-uses CONFIG_LIBAVB Kconfig symbol to wire
common/avb_verify.c to Kbuild.

So, unless you have some counter-proposal, I vote for adding a new
Kconfig symbol for common/avb_verify.c, which then can be marked as
dependent on FASTBOOT. This will also keep the hopes alive about
testing libavb on sandbox.

Thanks,
Eugeniu.
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