diff --git a/drivers/ata/pata_oldpiix.c b/drivers/ata/pata_oldpiix.c
index d59002e..29c23dd 100644
--- a/drivers/ata/pata_oldpiix.c
+++ b/drivers/ata/pata_oldpiix.c
@@ -289,20 +289,20 @@
 static int oldpiix_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 {
 	static int printed_version;
-	static struct ata_port_info info = {
+	static const struct ata_port_info info = {
 		.sht		= &oldpiix_sht,
 		.flags		= ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 		.pio_mask	= 0x1f,	/* pio0-4 */
 		.mwdma_mask	= 0x07, /* mwdma1-2 */
 		.port_ops	= &oldpiix_pata_ops,
 	};
-	static struct ata_port_info *port_info[2] = { &info, &info };
+	const struct ata_port_info *ppi[] = { &info, NULL };
 
 	if (!printed_version++)
 		dev_printk(KERN_DEBUG, &pdev->dev,
 			   "version " DRV_VERSION "\n");
 
-	return ata_pci_init_one(pdev, port_info, 2);
+	return ata_pci_init_one(pdev, ppi);
 }
 
 static const struct pci_device_id oldpiix_pci_tbl[] = {