tree add1b03309dd6fa82eb0f47e1a88766695f38f28
parent e31e8531d668c9c4dc7883054788f89805188003
author Tejun Heo <htejun@gmail.com> 1190520853 +0900
committer Jeff Garzik <jeff@garzik.org> 1192215342 -0400

libata-pmp-prep: implement sata_async_notification()

AN serves multiple purposes.  For ATAPI, it's used for media change
notification.  For PMP, for downstream PHY status change notification.
Implement sata_async_notification() which demultiplexes AN.

To avoid unnecessary port events, ATAPI AN is not enabled if PMP is
attached but SNTF is not available.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Cc: Kriten Carlson Accardi <kristen.c.accardi@intel.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>