diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index 5d0adfa..5dbcf0c 100644
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -1625,6 +1625,12 @@
 	idx = ofs + dev->xfer_shift;
 	WARN_ON(idx >= ARRAY_SIZE(xfer_mode_str));
 
+	if (ata_dev_revalidate(ap, dev, 0)) {
+		printk(KERN_ERR "ata%u: failed to revalidate after set "
+		       "xfermode, disabled\n", ap->id);
+		ata_port_disable(ap);
+	}
+
 	DPRINTK("idx=%d xfer_shift=%u, xfer_mode=0x%x, base=0x%x, offset=%d\n",
 		idx, dev->xfer_shift, (int)dev->xfer_mode, (int)base, ofs);