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SubjectRe: [RFC PATCH] efi/fb: Convert PCI bus address to resource if translated by the bridge
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On 5/16/2018 2:31 PM, Timur Tabi wrote:
> On 05/16/2018 01:23 PM, Sinan Kaya wrote:
>> +        win_start = window->res->start - window->offset;
>
> Can you guarantee that window->res->start is always >= window->offset?
>

Resource offset is generally 0 when not translating or a positive number
that you subtract from the resource start to reach to the translating window.

Having a bigger offset than resource start should be considered a BIOS bug.

>> +        win_size = window->res->end - window->res->start + 1;
>
> Use resource_size() instead.
>

I'll fix it.

--
Sinan Kaya
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.

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