Acquire a reference to the carrier's kernel module in bus code, so
it can't be removed from the kernel while it still has a bus and thus
possibly devices attached to it.
Signed-off-by: NJohannes Thumshirn <jthumshirn@suse.de>
Reported-by: NAndreas Werner <andreas.werner@men.de>
Tested-by: NAndreas Werner <andreas.werner@men.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>