tree 61abec6f82e0648f1d521e0d9fa92dca94fb9ccf
parent 9eba5d4a1d79d5094321469479b4dbe418f60110
author John Harrison <John.C.Harrison@Intel.com> 1416854964 +0000
committer Daniel Vetter <daniel.vetter@ffwll.ch> 1417595713 +0100

drm/i915: Add reference count to request structure

The plan is to use request structures everywhere that seqno values were
previously used. This means saving pointers to structures in places that used to
be simple integers. In turn, that means that the target structure now needs much
more stringent lifetime tracking. That is, it must not be freed while some other
random object still holds a pointer to it.

To achieve this tracking, a reference count needs to be added. Whenever a
pointer to the structure is saved away, the count must be incremented and the
free must only occur when all references have been released.

For: VIZ-4377
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Reviewed-by: Thomas Daniel <Thomas.Daniel@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>