[PATCH] drm/exynos: balance framebuffer refcount

[Andrzej Hajda]

exynos_drm_crtc_mode_set assigns primary framebuffer to plane without
taking reference. Then during framebuffer removal it is dereferenced twice,
causing oops. The patch fixes it.

Signed-off-by: Andrzej Hajda <a.hajda at samsung.com>
---
Hi,

This patch fixes framebuffer refcount balancing. The issue
appeared after merge of universal plane related patches.
Similar issue affected omap [1].

[1]: http://permalink.gmane.org/gmane.comp.video.dri.devel/104108

Regards
Andrzej
---
 drivers/gpu/drm/exynos/exynos_drm_crtc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
index e930d4f..1ef5ab9 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c
@@ -145,6 +145,7 @@ exynos_drm_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode,
 
 	plane->crtc = crtc;
 	plane->fb = crtc->primary->fb;
+	drm_framebuffer_reference(plane->fb);
 
 	return 0;
 }
-- 
1.8.3.2