drm/i915: Markup GEM API with lockdep asserts
Add lockdep_assert_held(struct_mutex) to the API preamble of the
internal GEM interfaces.
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/20161028125858.23563-9-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 fbe0923..d234c28 100644
--- a/drivers/gpu/drm/i915/i915_gem_request.c
+++ b/drivers/gpu/drm/i915/i915_gem_request.c
@@ -143,6 +143,9 @@
{
struct i915_gem_active *active, *next;
+ lockdep_assert_held(&request->i915->drm.struct_mutex);
+ GEM_BUG_ON(!i915_gem_request_completed(request));
+
trace_i915_gem_request_retire(request);
list_del_init(&request->link);
@@ -268,6 +271,8 @@
struct drm_i915_private *dev_priv = to_i915(dev);
int ret;
+ lockdep_assert_held(&dev_priv->drm.struct_mutex);
+
if (seqno == 0)
return -EINVAL;
@@ -612,6 +617,7 @@
u32 reserved_tail;
int ret;
+ lockdep_assert_held(&request->i915->drm.struct_mutex);
trace_i915_gem_request_add(request);
/*