There is small race window that could make kthread_stop hang forever.
I found that while hacking the IR subsystem.
Signed-off-by: NMaxim Levitsky <maximlevisky@gmail.com>
Signed-off-by: NArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>