tree 01e0dff1224476aa52c240ee958ec7948bb85cc6
parent 1c954a4d9a9e351fa3509533fd8dd5f3821206cd
author Tejun Heo <htejun@gmail.com> 1191909743 +0900
committer Jeff Garzik <jeff@garzik.org> 1192215347 -0400

ahci: fix notification handling

Asynchronous notification on ICH9 didn't work because it didn't write
AN FIS into the RX area - it only updates SNotification.  Also,
snooping SDB_FIS RX area is racy against further SDB FIS receptions.
Let sata_async_notification() determine using SNTF if it's available
and snoop RX area iff SNTF isn't available

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