libata-acpi: add ACPI _PSx method

ACPI spec (ver 3.0a, p289) requires IDE power on/off executes ACPI _PSx
methods. As recently most PATA drivers use libata, this patch adds _PSx
method support in libata. ACPI spec doesn't mention if SATA requires the
same _PSx method.

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
Acked-by: Len Brown <len.brown@intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 3 insertions, 0 deletions

diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c
index 21a81cd148e4..1d7faab64810 100644
--- a/drivers/ata/libata-eh.c
+++ b/drivers/ata/libata-eh.c
@@ -2747,6 +2747,7 @@ static void ata_eh_handle_port_suspend(struct ata_port *ap)
         if (ap->ops->port_suspend)
                 rc = ap->ops->port_suspend(ap, ap->pm_mesg);
 
+        ata_acpi_set_state(ap, PMSG_SUSPEND);
  out:
         /* report result */
         spin_lock_irqsave(ap->lock, flags);
@@ -2792,6 +2793,8 @@ static void ata_eh_handle_port_resume(struct ata_port *ap)
 
         WARN_ON(!(ap->pflags & ATA_PFLAG_SUSPENDED));
 
+        ata_acpi_set_state(ap, PMSG_ON);
+
         if (ap->ops->port_resume)
                 rc = ap->ops->port_resume(ap);