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drm: Don't set the plane->fb to NULL on successfull set_plane 

We need to clear the local variable to get the refcounting right
(since the reference drm_mode_setplane holds is transferred to the
plane->fb pointer). But should be done _after_ we update the pointer.

Breakage introduced in

commit 6c2a75325c
Author: Daniel Vetter <daniel.vetter@ffwll.ch>
Date:   Tue Dec 11 00:59:24 2012 +0100

    drm: refcounting for sprite framebuffers

Reported-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Cc: Rob Clark <rob@ti.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
This commit is contained in:
Daniel Vetter 2013-02-15 20:21:37 +00:00 committed by Rob Clark
parent 50fdaae79a
commit 6e488c0045
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/drm_crtc.c
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@ -1996,9 +1996,9 @@ int drm_mode_setplane(struct drm_device *dev, void *data,
plane_req->src_w, plane_req->src_h);
if (!ret) {
old_fb = plane->fb;
fb = NULL;
plane->crtc = crtc;
plane->fb = fb;
fb = NULL;
}
drm_modeset_unlock_all(dev);