From e0bfd149973d22a4330dd6665b54d1dcca07174a Mon Sep 17 00:00:00 2001
From: Tejun Heo <htejun@gmail.com>
Date: Mon, 23 Jan 2006 16:31:53 +0900
Subject: [PATCH] [PATCH] ahci: stop engine during hard reset

AHCI spec mandates engine to be stopped during hard resets.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
---
 drivers/scsi/ahci.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c
index 5a6b23009897..2abc0aca5a8d 100644
--- a/drivers/scsi/ahci.c
+++ b/drivers/scsi/ahci.c
@@ -504,7 +504,9 @@ static void ahci_phy_reset(struct ata_port *ap)
 	struct ata_device *dev = &ap->device[0];
 	u32 new_tmp, tmp;
 
+	ahci_stop_engine(ap);
 	__sata_phy_reset(ap);
+	ahci_start_engine(ap);
 
 	if (ap->flags & ATA_FLAG_PORT_DISABLED)
 		return;