The driver core clears the driver data to NULL after device_release
or on probe failure
Signed-off-by: NNizam Haider <nijamh@cdac.in>
Acked-by: NHans Ulli Kroll <ulli.kroll@googlemail.com>
Signed-off-by: NAlexandre Belloni <alexandre.belloni@free-electrons.com>