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.
> 
> Signed-off-by: Mathieu Malaterre <malat@debian.org>
> Link: https://bugs.debian.org/826629#57
> Suggested-by: Lennart Sorensen <lsorense@csclub.uwaterloo.ca>
> ---
>  drivers/video/fbdev/aty/radeon_base.c | 22 ++++++++++++++++++++--
>  1 file changed, 20 insertions(+), 2 deletions(-)

Thanks, queued for 4.9 fixes.

 Tomi