[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>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/scsi/ahci.c b/drivers/scsi/ahci.c
index 5a6b2300989..2abc0aca5a8 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;