[PATCH] drm/vmwgfx: Stop requesting the pci regions

[Javier Martinez Canillas]

On 1/18/22 20:00, Javier Martinez Canillas wrote:
> Hello Zack,
> 
> On 1/17/22 19:03, Zack Rusin wrote:
>> From: Zack Rusin <zackr at vmware.com>
>>
>> When sysfb_simple is enabled loading vmwgfx fails because the regions
>> are held by the platform. In that case remove_conflicting*_framebuffers
>> only removes the simplefb but not the regions held by sysfb.
>>
> 
> Indeed, that's an issue. I wonder if we should drop the IORESOURCE_BUSY
> flag from the memory resource added to the "simple-framebuffer" device ?
>
> In fact, maybe in sysfb_create_simplefb() shouldn't even attempt to claim
> a memory resource and just register the platform device with no resources ?
>  

Answering my own question, this would mean adding that platform specific
logic to the drivers matching the "simple-framebuffer" device so it should
remain in sysfb_create_simplefb().

But I still wonder if dropping the IORESOURCE_BUSY flag is something that
will be reasonable to prevent other drivers having the the issue reported
in this patch.

Best regards,
-- 
Javier Martinez Canillas
Linux Engineering
Red Hat