diff --git a/drivers/ata/pata_sil680.c b/drivers/ata/pata_sil680.c
index 8c0b25f..440e2cb 100644
--- a/drivers/ata/pata_sil680.c
+++ b/drivers/ata/pata_sil680.c
@@ -341,7 +341,7 @@
 
 static int sil680_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
 {
-	static struct ata_port_info info = {
+	static const struct ata_port_info info = {
 		.sht = &sil680_sht,
 		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 		.pio_mask = 0x1f,
@@ -349,7 +349,7 @@
 		.udma_mask = 0x7f,
 		.port_ops = &sil680_port_ops
 	};
-	static struct ata_port_info info_slow = {
+	static const struct ata_port_info info_slow = {
 		.sht = &sil680_sht,
 		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 		.pio_mask = 0x1f,
@@ -357,7 +357,7 @@
 		.udma_mask = 0x3f,
 		.port_ops = &sil680_port_ops
 	};
-	static struct ata_port_info *port_info[2] = {&info, &info};
+	const struct ata_port_info *ppi[] = { &info, NULL };
 	static int printed_version;
 
 	if (!printed_version++)
@@ -366,12 +366,12 @@
 	switch(sil680_init_chip(pdev))
 	{
 		case 0:
-			port_info[0] = port_info[1] = &info_slow;
+			ppi[0] = &info_slow;
 			break;
 		case 0x30:
 			return -ENODEV;
 	}
-	return ata_pci_init_one(pdev, port_info, 2);
+	return ata_pci_init_one(pdev, ppi);
 }
 
 #ifdef CONFIG_PM