Until recently uio_get_minor() returned 0 for success and
a negative value on failure. This became non-negative for suceess and
negative for failure. Restore the original return value spec so that we can
successfully initialize UIO devices with a non-zero minor device
number.
Cc: "Hans J. Koch" <hjk@hansjkoch.de>
Signed-off-by: Damian Hobson-Garcia <dhobsong@igel.co.jp>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
5ed0505c71