drm/exynos: balance framebuffer refcount

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@samsung.com> Signed-off-by: Inki Dae <inki.dae@samsung.com> Signed-off-by: Dave Airlie <airlied@redhat.com>

drm/exynos: balance framebuffer refcount
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@samsung.com> Signed-off-by: Inki Dae <inki.dae@samsung.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
Andrzej Hajda · Dave Airlie
1 parent d8af20bcae
Showing 1 changed file with 1 additions and 0 deletions Side-by-side Diff
drivers/gpu/drm/exynos/exynos_drm_crtc.c
@@ -145,6 +145,7 @@
  
 	plane->crtc = crtc;
 	plane->fb = crtc->primary->fb;
+	drm_framebuffer_reference(plane->fb);
  
 	return 0;
 }
...	...	@@ -145,6 +145,7 @@
145	145
146	146	plane->crtc = crtc;
147	147	plane->fb = crtc->primary->fb;
	148	+ drm_framebuffer_reference(plane->fb);
148	149
149	150	return 0;
150	151	}