Re: [PATCH] x86: devicetree: fix config option around x86_flattree_get_config()

[Laurent Pinchart]

Hi Frank,

Thank you for the patch.

On Saturday, 3 March 2018 06:12:26 EET frowand.list@xxxxxxxxx wrote:
> From: Frank Rowand <frank.rowand@xxxxxxxx>
> 
> x86_flattree_get_config() is incorrectly protected by
> ifdef CONFIG_OF_FLATTREE.  It uses of_get_flat_dt_size(), which
> only exists if CONFIG_OF_EARLY_FLATTREE.  This issue has not
> been exposed previously because OF_FLATTREE did not occur unless
> it was selected by OF_EARLY_FLATTREE.  A devicetree overlay change
> is selecting OF_FLATTREE directly instead of indirectly enabling
> it by selecting OF_EARLY_FLATTREE.
> 
> This problem was exposed by a randconfig generated by the kbuild
> test robot, where Platform OLPC was enabled.  OLPC selects
> OF_PROMTREE instead of OF_EARLY_FLATREE.  The only other x86
> platform that selects OF is X86_INTEL_CE, which does select
> OF_EARLY_FLATTREE.
> 
> Signed-off-by: Frank Rowand <frank.rowand@xxxxxxxx>
> ---
> 
> The devicetree overlay change is in patch 1/4 of the series:
> https://lkml.org/lkml/2018/3/2/979
> 
> The pull request for the patch series that triggered the kbuild
> test robot is:
> https://lkml.org/lkml/2018/3/2/1065
> 
>  arch/x86/kernel/devicetree.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/x86/kernel/devicetree.c b/arch/x86/kernel/devicetree.c
> index 25de5f6ca997..45416826f6ee 100644
> --- a/arch/x86/kernel/devicetree.c
> +++ b/arch/x86/kernel/devicetree.c
> @@ -259,7 +259,7 @@ static void __init dtb_apic_setup(void)
>  	dtb_ioapic_setup();
>  }
> 
> -#ifdef CONFIG_OF_FLATTREE
> +#ifdef CONFIG_OF_EARLY_FLATTREE
>  static void __init x86_flattree_get_config(void)
>  {
>  	u32 size, map_len;

This looks good to me. Could you respin the pull request with this patch 
included ? I need to send a pull request for a patch series based on your 
overlay changes, and I'd rather avoid breaking the build :-)

-- 
Regards,

Laurent Pinchart