diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 91b478f205572ec6570e17bb41bda4b635593311..622350d9b2e3af3915b07ca03ccdd2de4bf00d47 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -5936,7 +5936,7 @@ static void ata_port_detach(struct ata_port *ap)
 	 * to us.  Restore SControl and disable all existing devices.
 	 */
 	__ata_port_for_each_link(link, ap) {
-		sata_scr_write(link, SCR_CONTROL, link->saved_scontrol);
+		sata_scr_write(link, SCR_CONTROL, link->saved_scontrol & 0xff0);
 		ata_link_for_each_dev(dev, link)
 			ata_dev_disable(dev);
 	}