Use a separate mutex to serialize input device creation/removal,
otheriwse we deadlock if we try to remove input device while it is
being polled. Also do not take ams_info.lock when it is not needed.
Signed-off-by: NDmitry Torokhov <dtor@mail.ru>
Signed-off-by: NJohannes Berg <johannes@sipsolutions.net>
Signed-off-by: NJean Delvare <khali@linux-fr.org>