From d4f2fb10d5172428a8852d72df9d0909c7ba5c0c Mon Sep 17 00:00:00 2001
From: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Date: Thu, 16 Dec 2021 15:27:42 +0100
Subject: drm/i915: Require object lock when freeing pages during destruction
Git-commit: be7612fd6665f5ef3f6c89e78bb4ec4dbff6cd16
Patch-mainline: v5.17-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225
TTM already requires this, and we require it for delayed destroy.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211216142749.1966107-11-maarten.lankhorst@linux.intel.com
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
drivers/gpu/drm/i915/gem/i915_gem_object.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/gpu/drm/i915/gem/i915_gem_object.c b/drivers/gpu/drm/i915/gem/i915_gem_object.c
index 5fac9b560b73..39cd563544a5 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_object.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_object.c
@@ -262,6 +262,8 @@ static void __i915_gem_object_free_mmaps(struct drm_i915_gem_object *obj)
*/
void __i915_gem_object_pages_fini(struct drm_i915_gem_object *obj)
{
+ assert_object_held(obj);
+
if (!list_empty(&obj->vma.list)) {
struct i915_vma *vma;
@@ -328,7 +330,10 @@ static void __i915_gem_free_objects(struct drm_i915_private *i915,
obj->ops->delayed_free(obj);
continue;
}
+
+ i915_gem_object_lock(obj, NULL);
__i915_gem_object_pages_fini(obj);
+ i915_gem_object_unlock(obj);
__i915_gem_free_object(obj);
/* But keep the pointer alive for RCU-protected lookups */
--
2.38.1