Userspace is allowed to coalesce events between SYNCs. And since the code
emits UP right after DOWN for the same key, it may be missed
(up+down=nothing). Add an extra sync in between UP and DOWN events to disable
the coalesce.
Signed-off-by: NJiri Slaby <jslaby@suse.cz>
Cc: Patrick Boettcher <pboettcher@kernellabs.com>
Acked-by: NDmitry Torokhov <dtor@mail.ru>
Signed-off-by: NMauro Carvalho Chehab <mchehab@redhat.com>