Hello,
Here are two (attempted) fixes for the AST DRM driver. The issues they fix are both seen when the ast driver is unloaded (tested on Power9, although it looks like the second one is architecture independent).
I'm fairly confident about the first fix, as it looks pretty straight forward.
I'm not sure if the second patch uses the right approach, so I'd appreciate some feedback. I've had a good look around, and it does seem to fix the problem but I don't know this area at all.
Note that while it does seem odd to take a reference just before calling drm_framebuffer_remove(), that seems to be be necessary because drm_framebuffer_remove() is expecting the framebuffer to be dynamically allocated (but the AST driver directly contains it) (I saw some references to this being legacy behaviour).
Cheers, Sam.
Sam Bobroff (2): drm/ast: Fix incorrect free on ioregs drm/ast: Fix connector leak during driver unload
drivers/gpu/drm/ast/ast_fb.c | 4 ++++ drivers/gpu/drm/ast/ast_main.c | 3 ++- 2 files changed, 6 insertions(+), 1 deletion(-)