On 9/3/24 11:56, V, Narasimhan wrote:
[AMD Official Use Only - AMD Internal Distribution Only]
Hi,
________________________________________
From: Helge Deller <deller@xxxxxx>
Sent: Tuesday, September 3, 2024 01:48 AM
To: V, Narasimhan; Thomas Zimmermann
Cc: Linux Next Mailing List; Daniel Vetter; linux-fbdev@xxxxxxxxxxxxxxx; dri-devel@xxxxxxxxxxxxxxxxxxxxx; open list; linux@xxxxxxxxxxxxxx; Borislav Petkov
Subject: Re: WARNING: CPU: 0 PID: 8 at drivers/video/fbdev/core/fbmem.c:467 unregister_framebuffer+0x45/0x160
On 9/2/24 20:56, V, Narasimhan wrote:
From: Thomas Zimmermann <tzimmermann@xxxxxxx>
Seeing the following warning and bug on boot with linux-next-20240829
WARNING: CPU: 0 PID: 8 at drivers/video/fbdev/core/fbmem.c:467 unregister_framebuffer+0x45/0x160
BUG: kernel NULL pointer dereference, address: 0000000000000000
Does it work if you revert one of these commits?
c2fe0480cd77 ("fbdev/efifb: Use devm_register_framebuffer()")
Reverting this commit fixes the issue.
Good.
For the latter, there might be a fix at
https://patchwork.freedesktop.org/patch/611902/?series=138008&rev=1
Current fbdev git tree and for-next series have this newer patch already.
I expect that the issue is already resolved with there, but it would
be good if you could test.
Helge
The patch seems to be already into linux-next tree and the issue is no more seen with today's linux-next build.
Great.
Thanks for testing!
Helge
