77cdd783b0
Currently krefcount is using by umd and kmd. Due to sometimes there is issue in umd, such as release twice. That maybe causes buffer release before kmd access the buffer. This commit add a new refcount to track umd in use buffers and use current krefcount to track kmd in use buffers. For the same buffer use in kmd and umd only when all refcount become zero, the buffer start to release. CRs-Fixed: 3692103 Change-Id: I5a58d9bab4c82bdb192d6a6a3d2b3d254dc04c9e Signed-off-by: zhuo <quic_zhuo@quicinc.com>