diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 6a2083a6d175..479f95a5c0a3 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -2333,6 +2333,10 @@ static int ata_dev_set_mode(struct ata_device *dev)
 		dev->flags |= ATA_DFLAG_PIO;
 
 	err_mask = ata_dev_set_xfermode(dev);
+	/* Old CFA may refuse this command, which is just fine */
+	if (dev->xfer_shift == ATA_SHIFT_PIO && ata_id_is_cfa(dev->id))
+        	err_mask &= ~AC_ERR_DEV;
+
 	if (err_mask) {
 		ata_dev_printk(dev, KERN_ERR, "failed to set xfermode "
 			       "(err_mask=0x%x)\n", err_mask);