[Intel-gfx] [PATCH] drm/i915: Don't unregister fbdev twice

[Lukas Wunner]

Calling drm_framebuffer_unregister_private() in intel_fbdev_destroy() is
superfluous because the framebuffer will subsequently be unregistered by
drm_framebuffer_free() when unreferenced in drm_framebuffer_remove().
The call is a leftover, when it was introduced by commit 362063619cf6
("drm: revamp framebuffer cleanup interfaces"), struct intel_framebuffer
was still embedded in struct intel_fbdev rather than being a pointer as
it is today, and drm_framebuffer_remove() wasn't used yet.

As a bonus, the ID of the framebuffer is no longer 0 in the debug log:

Before:
    [   39.680874] [drm:drm_mode_object_unreference] OBJ ID: 0 (3)
    [   39.680878] [drm:drm_mode_object_unreference] OBJ ID: 0 (2)
    [   39.680884] [drm:drm_mode_object_unreference] OBJ ID: 0 (1)

After:
    [  102.504649] [drm:drm_mode_object_unreference] OBJ ID: 45 (3)
    [  102.504651] [drm:drm_mode_object_unreference] OBJ ID: 45 (2)
    [  102.504654] [drm:drm_mode_object_unreference] OBJ ID: 45 (1)

Signed-off-by: Lukas Wunner <lukas at wunner.de>
---
 drivers/gpu/drm/i915/intel_fbdev.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_fbdev.c b/drivers/gpu/drm/i915/intel_fbdev.c
index ef8e676..4c7ea46 100644
--- a/drivers/gpu/drm/i915/intel_fbdev.c
+++ b/drivers/gpu/drm/i915/intel_fbdev.c
@@ -552,8 +552,6 @@ static void intel_fbdev_destroy(struct drm_device *dev,
 	drm_fb_helper_fini(&ifbdev->helper);
 
 	if (ifbdev->fb) {
-		drm_framebuffer_unregister_private(&ifbdev->fb->base);
-
 		mutex_lock(&dev->struct_mutex);
 		intel_unpin_fb_obj(&ifbdev->fb->base, BIT(DRM_ROTATE_0));
 		mutex_unlock(&dev->struct_mutex);
-- 
2.8.1