[Intel-gfx] [PATCH 09/14] drm/i915: Add some extra guards in evict_vm

[Michel Thierry]

From: Ben Widawsky <benjamin.widawsky at intel.com>

Signed-off-by: Ben Widawsky <ben at bwidawsk.net>
---
 drivers/gpu/drm/i915/i915_gem_evict.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/i915_gem_evict.c b/drivers/gpu/drm/i915/i915_gem_evict.c
index bbf4b12..38297d3 100644
--- a/drivers/gpu/drm/i915/i915_gem_evict.c
+++ b/drivers/gpu/drm/i915/i915_gem_evict.c
@@ -214,6 +214,7 @@ int i915_gem_evict_vm(struct i915_address_space *vm, bool do_idle)
 	struct i915_vma *vma, *next;
 	int ret;
 
+	BUG_ON(!mutex_is_locked(&vm->dev->struct_mutex));
 	trace_i915_gem_evict_vm(vm);
 
 	if (do_idle) {
@@ -222,11 +223,15 @@ int i915_gem_evict_vm(struct i915_address_space *vm, bool do_idle)
 			return ret;
 
 		i915_gem_retire_requests(vm->dev);
+
+		WARN_ON(!list_empty(&vm->active_list));
 	}
 
-	list_for_each_entry_safe(vma, next, &vm->inactive_list, mm_list)
+	list_for_each_entry_safe(vma, next, &vm->inactive_list, mm_list) {
+		WARN_ON(!i915_is_ggtt(vm) && vma->pin_count);
 		if (vma->pin_count == 0)
 			WARN_ON(i915_vma_unbind(vma));
+	}
 
 	return 0;
 }
-- 
1.9.0