Web lists-archives.com

Re: [RFC PATCH] efi/fb: Convert PCI bus address to resource if translated by the bridge




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.