[PATCH] drm: Restore lost drm_framebuffer_unreference in drm_mode_page_flip_ioctl

[Chris Wilson]

Commit 43968d7b806d ("drm: Extract drm_plane.[hc]") was not the simple
cut'n'paste we presumed, somehow it introduced a leak of the page flip
target's framebuffer.

Fixes: 43968d7b806d ("drm: Extract drm_plane.[hc]")
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter at intel.com>
Cc: Sean Paul <seanpaul at chromium.org>
---
 drivers/gpu/drm/drm_plane.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c
index cd0d475bf3c3..783aef8acab7 100644
--- a/drivers/gpu/drm/drm_plane.c
+++ b/drivers/gpu/drm/drm_plane.c
@@ -898,6 +898,8 @@ int drm_mode_page_flip_ioctl(struct drm_device *dev,
 out:
 	if (ret && crtc->funcs->page_flip_target)
 		drm_crtc_vblank_put(crtc);
+	if (fb)
+		drm_framebuffer_unreference(fb);
 	if (crtc->primary->old_fb)
 		drm_framebuffer_unreference(crtc->primary->old_fb);
 	crtc->primary->old_fb = NULL;
-- 
2.9.3