]> git.baikalelectronics.ru Git - kernel.git/commit
drm/vkms: No need for ->pages_lock in crc work anymore
authorDaniel Vetter <daniel.vetter@ffwll.ch>
Thu, 6 Jun 2019 22:27:51 +0000 (00:27 +0200)
committerRodrigo Siqueira <rodrigosiqueiramelo@gmail.com>
Thu, 27 Jun 2019 02:19:22 +0000 (23:19 -0300)
commit7faf53d61e0a77d010fbf57ae46964a1fb30062b
tree08e55b4d0c52eea84289e62701acac60f5ca9d1d
parent26546e2c4f2ee6ad982b45fd2bb02ffd10c7bdc6
drm/vkms: No need for ->pages_lock in crc work anymore

We're now guaranteed to no longer race against prepare_fb/cleanup_fb,
which means we can access ->vaddr without having to hold a lock.

Before the previous patches it was fairly easy to observe the cursor
->vaddr being invalid, but that's now gone, so we can upgrade to a
full WARN_ON.

Cc: Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com>
Cc: Haneen Mohammed <hamohammed.sa@gmail.com>
Cc: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Reviewed-by: Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com>
Tested-by: Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com>
Signed-off-by: Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190606222751.32567-11-daniel.vetter@ffwll.ch
drivers/gpu/drm/vkms/vkms_crc.c