From: Jesse Barnes <jbarnes@virtuousgeek.org>
Date: Wed, 11 Feb 2009 21:28:14 +0000 (-0800)
Subject: drm/i915: take struct mutex around fb unref
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=496818f08a78476abdb307e241911536221239fc;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

drm/i915: take struct mutex around fb unref

Need to do this in case the unref ends up doing a free.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>
---

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 13f9b6667c94..4d2baf7b00be 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1606,7 +1606,9 @@ intel_user_framebuffer_create(struct drm_device *dev,
 
 	ret = intel_framebuffer_create(dev, mode_cmd, &fb, obj);
 	if (ret) {
+		mutex_lock(&dev->struct_mutex);
 		drm_gem_object_unreference(obj);
+		mutex_unlock(&dev->struct_mutex);
 		return NULL;
 	}