- undo the pfm_context_free() call in pfm_handle_work().
  The logic is different. In the case of a controlling
  task exiting while monitored in pfm_handle_work. The
  context is freed in pfm_close() and not pfm_handle_work().
signed-off-by: stephane eranian <eranian@hpl.hp.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>