libata: fix last_ctl caching in ata_tf_read()

@@ -196,7 +196,9 @@ void ata_tf_read(struct ata_port *ap, st
 {
 	struct ata_ioports *ioaddr = &ap->ioaddr;
 
+	ap->last_ctl = tf->ctl;
 	iowrite8(tf->ctl, ioaddr->ctl_addr);
+
 	tf->command = ata_check_status(ap);
 	tf->feature = ioread8(ioaddr->error_addr);
 	tf->nsect = ioread8(ioaddr->nsect_addr);

@@ -206,7 +208,9 @@ void ata_tf_read(struct ata_port *ap, st
 	tf->device = ioread8(ioaddr->device_addr);
 
 	if (tf->flags & ATA_TFLAG_LBA48) {
+		ap->last_ctl = tf->ctl | ATA_HOB;
 		iowrite8(tf->ctl | ATA_HOB, ioaddr->ctl_addr);
+
 		tf->hob_feature = ioread8(ioaddr->error_addr);
 		tf->hob_nsect = ioread8(ioaddr->nsect_addr);
 		tf->hob_lbal = ioread8(ioaddr->lbal_addr);