From e197e97d67883cacd0f97f3d32fc37e1e5c2f9c0 Mon Sep 17 00:00:00 2001
From: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
Date: Fri, 11 Jul 2014 00:39:12 +0200
Subject: [PATCH] exynos: disable crtc before freeing buffers

The crtc should be disabled before deallocating the buffers, otherwise
leading to a use-after-free scenario, which can trigger all sorts
of funny effects.
---
 gfx/exynos_gfx.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/gfx/exynos_gfx.c b/gfx/exynos_gfx.c
index 97ff24c755..8b3c8a5887 100644
--- a/gfx/exynos_gfx.c
+++ b/gfx/exynos_gfx.c
@@ -821,6 +821,10 @@ fail_alloc:
 static void exynos_free(struct exynos_data *pdata) {
   unsigned i;
 
+  /* Disable the CRTC. */
+  drmModeSetCrtc(pdata->fd, pdata->drm->crtc_id, 0,
+                 0, 0, &pdata->drm->connector_id, 1, NULL);
+
   clean_up_pages(pdata->pages, pdata->num_pages);
 
   free(pdata->pages);