V4L/DVB (10943): cx88: Prevent general protection fault on rmmod

V4L/DVB (10943): cx88: Prevent general protection fault on rmmod

commit 569b7ec73abf576f9a9e4070d213aadf2cce73cb upstream.

V4L/DVB (10943): cx88: Prevent general protection fault on rmmod

When unloading the cx8800 driver I sometimes get a general protection
fault. Analysis revealed a race in cx88_ir_stop(). It can be solved by
using a delayed work instead of a timer for infrared input polling.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>