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: Johannes Thumshirn <firstname.lastname@example.org>
Reported-by: Andreas Werner <email@example.com>
Tested-by: Andreas Werner <firstname.lastname@example.org>
Signed-off-by: Greg Kroah-Hartman <email@example.com>