[v2,0/3] Fixes and cleanup for DRM fbdev emulation and deferred I/O

Message

Javier Martinez Canillas Jan. 21, 2023, 7:24 p.m. UTC

Hello,

This patch series contains two fixes and a cleanup for things that I noticed
while debugging a regression in the fbdev emulation for a DRM driver.

The first two patches are trivial and shoulnd't be controversial, the third
patch is less trivial, but it has been already reviewed by Thomas and I did
test it to make sure that works as expected. With it, I got rid of the WARN
that happened due a mutex used after it has been destroyed.

Best regards,
Javier

Changes in v2:
- Re-introduce the CONFIG_FB_DEFERRED_IO ifdef guard for the @fbdefio field
  declaration since the kernel test robot reported that's needed at the end.

Javier Martinez Canillas (3):
  fbdev: Remove unused struct fb_deferred_io .first_io field
  drm/fb-helper: Check fb_deferred_io_init() return value
  drm/fb-helper: Use a per-driver FB deferred I/O handler

 drivers/gpu/drm/drm_fbdev_generic.c | 15 ++++++++-------
 drivers/video/fbdev/core/fb_defio.c |  4 ----
 include/drm/drm_fb_helper.h         | 12 ++++++++++++
 include/linux/fb.h                  |  1 -
 4 files changed, 20 insertions(+), 12 deletions(-)