drm/i915: Add some extra guards in evict_vm

v2: Use WARN_ONs (Daniel)

Cc: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Michel Thierry <michel.thierry@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/i915_gem_evict.c b/drivers/gpu/drm/i915/i915_gem_evict.c
index d104c9120c4d..e3a49d94da3a 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;
 
+        WARN_ON(!mutex_is_locked(&vm->dev->struct_mutex));
         trace_i915_gem_evict_vm(vm);
 
         if (do_idle) {
@@ -222,6 +223,8 @@ 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)