drm/i915: Add a couple WARN()'s to catch missing locks
drm/i915: Add a couple WARN()'s to catch missing locks

Add !mutex_is_locked() checks to intel_pin_and_fence_fb_obj() and
intel_unpin_fb_obj() to help catch failures to grab struct_mutex when
operating on fb objects.

Signed-off-by: Matt Roper <f1605a76cb9f6387d99228a0a9260318379b62de@intel.com>
Signed-off-by: Daniel Vetter <c1b6782c4af8f0673da8923a0702a1832e5940f4@ffwll.ch>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs