tree 23ede4117c50f6794628fe5084bfd91027be12e3
parent eec59f76e9010e22d5736cf1907af4a92067522e
author Tejun Heo <htejun@gmail.com> 1204776774 +0900
committer Jeff Garzik <jeff@garzik.org> 1205196636 -0400

libata-sff: handle controllers w/o ctl register

SFF incorrectly assumed that ctl register is available for all
controllers while some old SFF controllers don't have ctl register.
Make SFF handle controllers w/o ctl register by conditionalizing ctl
register access and softreset method.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Jeff Garzik <jeff@garzik.org>