[Nouveau] [PATCH] bios: fix OF loading

[Hans de Goede]

Hi,

On 02-10-15 09:38, Ilia Mirkin wrote:
> On Fri, Oct 2, 2015 at 3:35 AM, Hans de Goede <hdegoede at redhat.com> wrote:
>> Hi,
>>
>> On 02-10-15 09:26, Ilia Mirkin wrote:
>>>
>>> On Fri, Oct 2, 2015 at 3:18 AM, Hans de Goede <hdegoede at redhat.com> wrote:
>>>>
>>>> Hi,
>>>>
>>>> On 02-10-15 05:41, Ilia Mirkin wrote:
>>>>
>>>> <nothing>
>>>>
>>>> As someone who has recently started following nouveau I must say that
>>>> it would greatly help me (and likely others) if patches likes this would
>>>> come with a somewhat more descriptive commit message.
>>>
>>>
>>> Duly noted. I normally try to say a bit, but have gotten lazy of late.
>>> Ben's pretty terse too :) How about something like
>>>
>>> """
>>> Currently OF bios load fails for a few reasons:
>>>    - checksum failure
>>>    - bios size too small
>>>    - no PCIR header
>>>    - bios length not a multiple of 4
>>>
>>> In this change, we resolve all of the above by ignoring any checksum
>>> failures, and faking the PCIR data when loading from OF.
>>> """
>>
>>
>> Much better, I must say that now that you spell it out that the
>> ignoring of the checksum sort of worries me, but I guess the
>> checksum is part of the missing PCIR header ?
>
> Nope, the two things are unrelated. The PCIR section is normally
> embedded in the vbios and tells you how long the vbios is, and allows
> you to have multiple elements appended at the end (which nouveau has
> recently acquired some support for). The checksum failures just
> happen,

> "pretty sure that the OF-sourced vbioses just don't have a
>  checksum byte at all."

You may want to add something along those lines to the commit message
too...

Regards,

Hans