drm: Improve dumb callback docs

Noticed while reviewing a patch from Eric. Also add a todo for the
dumb_map_offset callbacks (it should be simple to do, but piles of
work). Plus fix up vbox, because vbox.

Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <maxime.ripard@bootlin.com>
Cc: Sean Paul <sean@poorly.run>
Cc: David Airlie <airlied@linux.ie>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Nicholas Mc Guire <der.herr@hofr.at>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Fabio Rafael da Rosa <fdr@pid42.net>
Reviewed-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20181127091921.8325-1-daniel.vetter@ffwll.ch

1 files changed, 0 insertions, 1 deletions

diff --git a/drivers/staging/vboxvideo/vbox_drv.c b/drivers/staging/vboxvideo/vbox_drv.c
index 257030460fb6..d3e23dd70c1b 100644
--- a/drivers/staging/vboxvideo/vbox_drv.c
+++ b/drivers/staging/vboxvideo/vbox_drv.c
@@ -279,7 +279,6 @@ static struct drm_driver driver = {
         .gem_free_object_unlocked = vbox_gem_free_object,
         .dumb_create = vbox_dumb_create,
         .dumb_map_offset = vbox_dumb_mmap_offset,
-        .dumb_destroy = drm_gem_dumb_destroy,
         .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
         .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
         .gem_prime_export = drm_gem_prime_export,