drm/i915: Assert that the request hasn't been retired
With all callers now not playing tricks with dropping the struct_mutex
between waiting and retiring, we can assert that the request is ready to
be retired.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1470388464-28458-19-git-send-email-chris@chris-wilson.co.uk
diff --git a/drivers/gpu/drm/i915/i915_gem_request.c b/drivers/gpu/drm/i915/i915_gem_request.c
index 1f91dc8..b317a67 100644
--- a/drivers/gpu/drm/i915/i915_gem_request.c
+++ b/drivers/gpu/drm/i915/i915_gem_request.c
@@ -170,7 +170,7 @@
struct i915_gem_active *active, *next;
trace_i915_gem_request_retire(request);
- list_del_init(&request->link);
+ list_del(&request->link);
/* We know the GPU must have read the request to have
* sent us the seqno + interrupt, so use the position
@@ -228,9 +228,7 @@
struct drm_i915_gem_request *tmp;
lockdep_assert_held(&req->i915->drm.struct_mutex);
-
- if (list_empty(&req->link))
- return;
+ GEM_BUG_ON(list_empty(&req->link));
do {
tmp = list_first_entry(&engine->request_list,