libata-core: Fix the iordy methods

This alone isn't sufficient to save the universe from prehistoric disks
and controllers but it is a first important step. Split off a separate
function to provide a mode filter when controller iordy is not available.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
1 file changed