[PATCH] Fix loading of module radeonfb on PowerMac
Tomi Valkeinen
tomi.valkeinen at ti.com
Wed Nov 2 19:28:55 AEDT 2016
On 08/10/16 15:09, Mathieu Malaterre wrote:
> When the linux kernel is build with (typical kernel ship with Debian
> installer):
>
> CONFIG_FB_OF=y
> CONFIG_VT_HW_CONSOLE_BINDING=y
> CONFIG_FB_RADEON=m
>
> The offb driver takes precedence over module radeonfb. It is then
> impossible to load the module, error reported is:
>
> [ 96.551486] radeonfb 0000:00:10.0: enabling device (0006 -> 0007)
> [ 96.551526] radeonfb 0000:00:10.0: BAR 0: can't reserve [mem 0x98000000-0x9fffffff pref]
> [ 96.551531] radeonfb (0000:00:10.0): cannot request region 0.
> [ 96.551545] radeonfb: probe of 0000:00:10.0 failed with error -16
>
> This patch reproduce the behavior of the module radeon, so as to make it
> possible to load radeonfb when offb is first loaded.
>
> It should be noticed that `offb_destroy` is never called which explain the
> need to skip error detection on the radeon side.
Why is that? It sounds rather bad if two drivers claim the same resources.
Tomi
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