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>

1 files changed, 1 insertions, 4 deletions

diff --git a/drivers/ata/sata_sil24.c b/drivers/ata/sata_sil24.c
index 9acfce43bde4..b4f81eb8bbbe 100644
--- a/drivers/ata/sata_sil24.c
+++ b/drivers/ata/sata_sil24.c
@@ -821,11 +821,8 @@ static void sil24_error_intr(struct ata_port *ap)
         ata_ehi_push_desc(ehi, "irq_stat 0x%08x", irq_stat);
 
         if (irq_stat & PORT_IRQ_SDB_NOTIFY) {
-                struct ata_device *dev = ap->link.device;
-
                 ata_ehi_push_desc(ehi, "SDB notify");
-                if (dev->flags & ATA_DFLAG_AN)
-                        ata_scsi_media_change_notify(dev);
+                sata_async_notification(ap);
         }
 
         if (irq_stat & (PORT_IRQ_PHYRDY_CHG | PORT_IRQ_DEV_XCHG)) {