Re: [BUG] can't boot up: unable to handle kernel paging request at ffffffffff340003

Madper Xie
2014-02-13T13:40:36Z

matt-HNK1S37rvNbeXh+fF434Mdi2O/JbrIOy@public.gmane.org writes:

> On Wed, 12 Feb, at 09:15:03AM, Toshi Kani wrote:
>>
>> Hi Matt,
>>
>> Yes, I agree that the table size should be 0x38. However, ACPI spec
>> states that bit0 of status indicates if the boot image graphic is valid.
>> This bit is set to 0 (invalid) on the system. Can you check this bit
>> and return when invalid?
>
> Madper, could you try out this patch?
>
Thanks Matt. This patch fix the panic. And ioremap warning disappeared
after apply your patch.
> ---
>
> diff --git a/arch/x86/platform/efi/efi-bgrt.c b/arch/x86/platform/efi/efi-bgrt.c
> index 4df9591eadad..f15103dff4b4 100644
> --- a/arch/x86/platform/efi/efi-bgrt.c
> +++ b/arch/x86/platform/efi/efi-bgrt.c
> @@ -42,7 +42,7 @@ void __init efi_bgrt_init(void)
>
> if (bgrt_tab->header.length < sizeof(*bgrt_tab))
> return;
> - if (bgrt_tab->version != 1)
> + if (bgrt_tab->version != 1 || bgrt_tab->status != 1)
> return;
> if (bgrt_tab->image_type != 0 || !bgrt_tab->image_address)
> return;

--
Madper