diff --git a/drivers/ata/ata_generic.c b/drivers/ata/ata_generic.c
index 0f19e32..c3d7532 100644
--- a/drivers/ata/ata_generic.c
+++ b/drivers/ata/ata_generic.c
@@ -141,7 +141,7 @@
 static int ata_generic_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 {
 	u16 command;
-	static struct ata_port_info info = {
+	static const struct ata_port_info info = {
 		.sht = &generic_sht,
 		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 		.pio_mask = 0x1f,
@@ -149,7 +149,7 @@
 		.udma_mask = 0x3f,
 		.port_ops = &generic_port_ops
 	};
-	static struct ata_port_info *port_info[2] = { &info, &info };
+	const struct ata_port_info *ppi[] = { &info, NULL };
 
 	/* Don't use the generic entry unless instructed to do so */
 	if (id->driver_data == 1 && all_generic_ide == 0)
@@ -175,7 +175,7 @@
 	if (dev->vendor == PCI_VENDOR_ID_AL)
 	    	ata_pci_clear_simplex(dev);
 
-	return ata_pci_init_one(dev, port_info, 2);
+	return ata_pci_init_one(dev, ppi);
 }
 
 static struct pci_device_id ata_generic[] = {
diff --git a/drivers/ata/ata_piix.c b/drivers/ata/ata_piix.c
index 4f5a0dc..13b6b1d 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -1030,7 +1030,7 @@
 	static int printed_version;
 	struct device *dev = &pdev->dev;
 	struct ata_port_info port_info[2];
-	struct ata_port_info *ppinfo[2] = { &port_info[0], &port_info[1] };
+	const struct ata_port_info *ppi[] = { &port_info[0], &port_info[1] };
 	struct piix_host_priv *hpriv;
 	unsigned long port_flags;
 
@@ -1089,7 +1089,7 @@
 		port_info[1].mwdma_mask = 0;
 		port_info[1].udma_mask = 0;
 	}
-	return ata_pci_init_one(pdev, ppinfo, 2);
+	return ata_pci_init_one(pdev, ppi);
 }
 
 static int __init piix_init(void)
diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index bf8f65b..9cff5c5 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -6856,6 +6856,7 @@
 #ifdef CONFIG_PCI
 EXPORT_SYMBOL_GPL(pci_test_config_bits);
 EXPORT_SYMBOL_GPL(ata_pci_init_native_host);
+EXPORT_SYMBOL_GPL(ata_pci_init_bmdma);
 EXPORT_SYMBOL_GPL(ata_pci_prepare_native_host);
 EXPORT_SYMBOL_GPL(ata_pci_init_one);
 EXPORT_SYMBOL_GPL(ata_pci_remove_one);
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index d211db6..e35d134 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -544,7 +544,7 @@
  *	RETURNS:
  *	0 on success, -errno otherwise.
  */
-static int ata_pci_init_bmdma(struct ata_host *host)
+int ata_pci_init_bmdma(struct ata_host *host)
 {
 	struct device *gdev = host->dev;
 	struct pci_dev *pdev = to_pci_dev(gdev);
@@ -566,7 +566,7 @@
 	}
 	host->iomap = pcim_iomap_table(pdev);
 
-	for (i = 0; i < host->n_ports; i++) {
+	for (i = 0; i < 2; i++) {
 		struct ata_port *ap = host->ports[i];
 		void __iomem *bmdma = host->iomap[4] + 8 * i;
 
@@ -585,54 +585,52 @@
 /**
  *	ata_pci_init_native_host - acquire native ATA resources and init host
  *	@host: target ATA host
- *	@port_mask: ports to consider
  *
- *	Acquire native PCI ATA resources for @host and initialize
- *	@host accordoingly.
+ *	Acquire native PCI ATA resources for @host and initialize the
+ *	first two ports of @host accordingly.  Ports marked dummy are
+ *	skipped and allocation failure makes the port dummy.
  *
  *	LOCKING:
  *	Inherited from calling layer (may sleep).
  *
  *	RETURNS:
- *	0 on success, -errno otherwise.
+ *	0 if at least one port is initialized, -ENODEV if no port is
+ *	available.
  */
-int ata_pci_init_native_host(struct ata_host *host, unsigned int port_mask)
+int ata_pci_init_native_host(struct ata_host *host)
 {
 	struct device *gdev = host->dev;
 	struct pci_dev *pdev = to_pci_dev(gdev);
+	unsigned int mask = 0;
 	int i, rc;
 
-	/* Discard disabled ports.  Some controllers show their unused
-	 * channels this way.  Disabled ports are made dummy.
-	 */
-	for (i = 0; i < 2; i++) {
-		if ((port_mask & (1 << i)) && !ata_resources_present(pdev, i)) {
-			host->ports[i]->ops = &ata_dummy_port_ops;
-			port_mask &= ~(1 << i);
-		}
-	}
-
-	if (!port_mask) {
-		dev_printk(KERN_ERR, gdev, "no available port\n");
-		return -ENODEV;
-	}
-
 	/* request, iomap BARs and init port addresses accordingly */
 	for (i = 0; i < 2; i++) {
 		struct ata_port *ap = host->ports[i];
 		int base = i * 2;
 		void __iomem * const *iomap;
 
-		if (!(port_mask & (1 << i)))
+		if (ata_port_is_dummy(ap))
 			continue;
 
+		/* Discard disabled ports.  Some controllers show
+		 * their unused channels this way.  Disabled ports are
+		 * made dummy.
+		 */
+		if (!ata_resources_present(pdev, i)) {
+			ap->ops = &ata_dummy_port_ops;
+			continue;
+		}
+
 		rc = pcim_iomap_regions(pdev, 0x3 << base, DRV_NAME);
 		if (rc) {
-			dev_printk(KERN_ERR, gdev, "failed to request/iomap "
-				   "BARs for port %d (errno=%d)\n", i, rc);
+			dev_printk(KERN_WARNING, gdev,
+				   "failed to request/iomap BARs for port %d "
+				   "(errno=%d)\n", i, rc);
 			if (rc == -EBUSY)
 				pcim_pin_device(pdev);
-			return rc;
+			ap->ops = &ata_dummy_port_ops;
+			continue;
 		}
 		host->iomap = iomap = pcim_iomap_table(pdev);
 
@@ -641,6 +639,13 @@
 		ap->ioaddr.ctl_addr = (void __iomem *)
 			((unsigned long)iomap[base + 1] | ATA_PCI_CTL_OFS);
 		ata_std_ports(&ap->ioaddr);
+
+		mask |= 1 << i;
+	}
+
+	if (!mask) {
+		dev_printk(KERN_ERR, gdev, "no available native port\n");
+		return -ENODEV;
 	}
 
 	return 0;
@@ -649,8 +654,7 @@
 /**
  *	ata_pci_prepare_native_host - helper to prepare native PCI ATA host
  *	@pdev: target PCI device
- *	@ppi: array of port_info
- *	@n_ports: number of ports to allocate
+ *	@ppi: array of port_info, must be enough for two ports
  *	@r_host: out argument for the initialized ATA host
  *
  *	Helper to allocate ATA host for @pdev, acquire all native PCI
@@ -664,10 +668,9 @@
  */
 int ata_pci_prepare_native_host(struct pci_dev *pdev,
 				const struct ata_port_info * const * ppi,
-				int n_ports, struct ata_host **r_host)
+				struct ata_host **r_host)
 {
 	struct ata_host *host;
-	unsigned int port_mask;
 	int rc;
 
 	if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL))
@@ -681,11 +684,7 @@
 		goto err_out;
 	}
 
-	port_mask = ATA_PORT_PRIMARY;
-	if (n_ports > 1)
-		port_mask |= ATA_PORT_SECONDARY;
-
-	rc = ata_pci_init_native_host(host, port_mask);
+	rc = ata_pci_init_native_host(host);
 	if (rc)
 		goto err_out;
 
@@ -777,8 +776,11 @@
 	/* iomap cmd and ctl ports */
 	legacy_dr->cmd_addr[port_no] = ioport_map(cmd_port, 8);
 	legacy_dr->ctl_addr[port_no] = ioport_map(ctl_port, 1);
-	if (!legacy_dr->cmd_addr[port_no] || !legacy_dr->ctl_addr[port_no])
+	if (!legacy_dr->cmd_addr[port_no] || !legacy_dr->ctl_addr[port_no]) {
+		dev_printk(KERN_WARNING, host->dev,
+			   "failed to map cmd/ctl ports\n");
 		return -ENOMEM;
+	}
 
 	/* init IO addresses */
 	ap->ioaddr.cmd_addr = legacy_dr->cmd_addr[port_no];
@@ -792,19 +794,20 @@
 /**
  *	ata_init_legacy_host - acquire legacy ATA resources and init ATA host
  *	@host: target ATA host
- *	@legacy_mask: out parameter, mask indicating ports is in legacy mode
  *	@was_busy: out parameter, indicates whether any port was busy
  *
- *	Acquire legacy ATA resources for ports.
+ *	Acquire legacy ATA resources for the first two ports of @host
+ *	and initialize it accordingly.  Ports marked dummy are skipped
+ *	and resource acquistion failure makes the port dummy.
  *
  *	LOCKING:
  *	Inherited from calling layer (may sleep).
  *
  *	RETURNS:
- *	0 on success, -errno otherwise.
+ *	0 if at least one port is initialized, -ENODEV if no port is
+ *	available.
  */
-static int ata_init_legacy_host(struct ata_host *host,
-				unsigned int *legacy_mask, int *was_busy)
+static int ata_init_legacy_host(struct ata_host *host, int *was_busy)
 {
 	struct device *gdev = host->dev;
 	struct ata_legacy_devres *legacy_dr;
@@ -821,22 +824,23 @@
 	devres_add(gdev, legacy_dr);
 
 	for (i = 0; i < 2; i++) {
-		*legacy_mask &= ~(1 << i);
+		if (ata_port_is_dummy(host->ports[i]))
+			continue;
+
 		rc = ata_init_legacy_port(host->ports[i], legacy_dr);
 		if (rc == 0)
 			legacy_dr->mask |= 1 << i;
-		else if (rc == -EBUSY)
-			(*was_busy)++;
+		else {
+			if (rc == -EBUSY)
+				(*was_busy)++;
+			host->ports[i]->ops = &ata_dummy_port_ops;
+		}
 	}
 
-	if (!legacy_dr->mask)
-		return -EBUSY;
-
-	for (i = 0; i < 2; i++)
-		if (!(legacy_dr->mask & (1 << i)))
-			host->ports[i]->ops = &ata_dummy_port_ops;
-
-	*legacy_mask |= legacy_dr->mask;
+	if (!legacy_dr->mask) {
+		dev_printk(KERN_ERR, gdev, "no available legacy port\n");
+		return -ENODEV;
+	}
 
 	devres_remove_group(gdev, NULL);
 	return 0;
@@ -875,7 +879,7 @@
 	legacy_dr = devres_find(host->dev, ata_legacy_release, NULL, NULL);
 	BUG_ON(!legacy_dr);
 
-	for (i = 0; i < host->n_ports; i++) {
+	for (i = 0; i < 2; i++) {
 		unsigned int irq;
 
 		/* FIXME: ATA_*_IRQ() should take generic device not pci_dev */
@@ -923,8 +927,7 @@
 /**
  *	ata_pci_init_one - Initialize/register PCI IDE host controller
  *	@pdev: Controller to be initialized
- *	@port_info: Information from low-level host driver
- *	@n_ports: Number of ports attached to host controller
+ *	@ppi: array of port_info, must be enough for two ports
  *
  *	This is a helper function which can be called from a driver's
  *	xxx_init_one() probe function if the hardware uses traditional
@@ -944,27 +947,35 @@
  *	RETURNS:
  *	Zero on success, negative on errno-based value on error.
  */
-
-int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
-		      unsigned int n_ports)
+int ata_pci_init_one(struct pci_dev *pdev,
+		     const struct ata_port_info * const * ppi)
 {
 	struct device *dev = &pdev->dev;
+	const struct ata_port_info *pi = NULL;
 	struct ata_host *host = NULL;
-	const struct ata_port_info *port[2];
 	u8 mask;
-	unsigned int legacy_mode = 0;
-	int rc;
+	int legacy_mode = 0;
+	int i, rc;
 
 	DPRINTK("ENTER\n");
 
+	/* look up the first valid port_info */
+	for (i = 0; i < 2 && ppi[i]; i++) {
+		if (ppi[i]->port_ops != &ata_dummy_port_ops) {
+			pi = ppi[i];
+			break;
+		}
+	}
+
+	if (!pi) {
+		dev_printk(KERN_ERR, &pdev->dev,
+			   "no valid port_info specified\n");
+		return -EINVAL;
+	}
+
 	if (!devres_open_group(dev, NULL, GFP_KERNEL))
 		return -ENOMEM;
 
-	BUG_ON(n_ports < 1 || n_ports > 2);
-
-	port[0] = port_info[0];
-	port[1] = (n_ports > 1) ? port_info[1] : NULL;
-
 	/* FIXME: Really for ATA it isn't safe because the device may be
 	   multi-purpose and we want to leave it alone if it was already
 	   enabled. Secondly for shared use as Arjan says we want refcounting
@@ -984,7 +995,7 @@
 		pci_read_config_byte(pdev, PCI_CLASS_PROG, &tmp8);
 		mask = (1 << 2) | (1 << 0);
 		if ((tmp8 & mask) != mask)
-			legacy_mode = (1 << 3);
+			legacy_mode = 1;
 #if defined(CONFIG_NO_ATA_LEGACY)
 		/* Some platforms with PCI limits cannot address compat
 		   port space. In that case we punt if their firmware has
@@ -998,7 +1009,7 @@
 	}
 
 	/* alloc and init host */
-	host = ata_host_alloc_pinfo(dev, port, n_ports);
+	host = ata_host_alloc_pinfo(dev, ppi, 2);
 	if (!host) {
 		dev_printk(KERN_ERR, &pdev->dev,
 			   "failed to allocate ATA host\n");
@@ -1007,19 +1018,13 @@
 	}
 
 	if (!legacy_mode) {
-		unsigned int port_mask;
-
-		port_mask = ATA_PORT_PRIMARY;
-		if (n_ports > 1)
-			port_mask |= ATA_PORT_SECONDARY;
-
-		rc = ata_pci_init_native_host(host, port_mask);
+		rc = ata_pci_init_native_host(host);
 		if (rc)
 			goto err_out;
 	} else {
 		int was_busy = 0;
 
-		rc = ata_init_legacy_host(host, &legacy_mode, &was_busy);
+		rc = ata_init_legacy_host(host, &was_busy);
 		if (was_busy)
 			pcim_pin_device(pdev);
 		if (rc)
@@ -1040,8 +1045,7 @@
 		goto err_out;
 
 	if (!legacy_mode)
-		rc = devm_request_irq(dev, pdev->irq,
-				      port_info[0]->port_ops->irq_handler,
+		rc = devm_request_irq(dev, pdev->irq, pi->port_ops->irq_handler,
 				      IRQF_SHARED, DRV_NAME, host);
 	else {
 		irq_handler_t handler[2] = { host->ops->irq_handler,
@@ -1055,7 +1059,7 @@
 		goto err_out;
 
 	/* register */
-	rc = ata_host_register(host, port_info[0]->sht);
+	rc = ata_host_register(host, pi->sht);
 	if (rc)
 		goto err_out;
 
diff --git a/drivers/ata/pata_ali.c b/drivers/ata/pata_ali.c
index 48c7531..3c55a5f 100644
--- a/drivers/ata/pata_ali.c
+++ b/drivers/ata/pata_ali.c
@@ -518,14 +518,14 @@
 
 static int ali_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
 {
-	static struct ata_port_info info_early = {
+	static const struct ata_port_info info_early = {
 		.sht = &ali_sht,
 		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 		.pio_mask = 0x1f,
 		.port_ops = &ali_early_port_ops
 	};
 	/* Revision 0x20 added DMA */
-	static struct ata_port_info info_20 = {
+	static const struct ata_port_info info_20 = {
 		.sht = &ali_sht,
 		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST | ATA_FLAG_PIO_LBA48,
 		.pio_mask = 0x1f,
@@ -533,7 +533,7 @@
 		.port_ops = &ali_20_port_ops
 	};
 	/* Revision 0x20 with support logic added UDMA */
-	static struct ata_port_info info_20_udma = {
+	static const struct ata_port_info info_20_udma = {
 		.sht = &ali_sht,
 		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST | ATA_FLAG_PIO_LBA48,
 		.pio_mask = 0x1f,
@@ -542,7 +542,7 @@
 		.port_ops = &ali_20_port_ops
 	};
 	/* Revision 0xC2 adds UDMA66 */
-	static struct ata_port_info info_c2 = {
+	static const struct ata_port_info info_c2 = {
 		.sht = &ali_sht,
 		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST | ATA_FLAG_PIO_LBA48,
 		.pio_mask = 0x1f,
@@ -551,7 +551,7 @@
 		.port_ops = &ali_c2_port_ops
 	};
 	/* Revision 0xC3 is UDMA100 */
-	static struct ata_port_info info_c3 = {
+	static const struct ata_port_info info_c3 = {
 		.sht = &ali_sht,
 		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST | ATA_FLAG_PIO_LBA48,
 		.pio_mask = 0x1f,
@@ -560,7 +560,7 @@
 		.port_ops = &ali_c2_port_ops
 	};
 	/* Revision 0xC4 is UDMA133 */
-	static struct ata_port_info info_c4 = {
+	static const struct ata_port_info info_c4 = {
 		.sht = &ali_sht,
 		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST | ATA_FLAG_PIO_LBA48,
 		.pio_mask = 0x1f,
@@ -569,7 +569,7 @@
 		.port_ops = &ali_c2_port_ops
 	};
 	/* Revision 0xC5 is UDMA133 with LBA48 DMA */
-	static struct ata_port_info info_c5 = {
+	static const struct ata_port_info info_c5 = {
 		.sht = &ali_sht,
 		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 		.pio_mask = 0x1f,
@@ -578,7 +578,7 @@
 		.port_ops = &ali_c5_port_ops
 	};
 
-	static struct ata_port_info *port_info[2];
+	const struct ata_port_info *ppi[] = { NULL, NULL };
 	u8 rev, tmp;
 	struct pci_dev *isa_bridge;
 
@@ -590,17 +590,17 @@
 	 */
 
 	if (rev < 0x20) {
-		port_info[0] = port_info[1] = &info_early;
+		ppi[0] = &info_early;
 	} else if (rev < 0xC2) {
-        	port_info[0] = port_info[1] = &info_20;
+        	ppi[0] = &info_20;
 	} else if (rev == 0xC2) {
-        	port_info[0] = port_info[1] = &info_c2;
+        	ppi[0] = &info_c2;
 	} else if (rev == 0xC3) {
-        	port_info[0] = port_info[1] = &info_c3;
+        	ppi[0] = &info_c3;
 	} else if (rev == 0xC4) {
-        	port_info[0] = port_info[1] = &info_c4;
+        	ppi[0] = &info_c4;
 	} else
-        	port_info[0] = port_info[1] = &info_c5;
+        	ppi[0] = &info_c5;
 
 	ali_init_chipset(pdev);
 
@@ -609,10 +609,10 @@
 		/* Are we paired with a UDMA capable chip */
 		pci_read_config_byte(isa_bridge, 0x5E, &tmp);
 		if ((tmp & 0x1E) == 0x12)
-	        	port_info[0] = port_info[1] = &info_20_udma;
+	        	ppi[0] = &info_20_udma;
 		pci_dev_put(isa_bridge);
 	}
-	return ata_pci_init_one(pdev, port_info, 2);
+	return ata_pci_init_one(pdev, ppi);
 }
 
 #ifdef CONFIG_PM
diff --git a/drivers/ata/pata_amd.c b/drivers/ata/pata_amd.c
index 86a2618..b439351 100644
--- a/drivers/ata/pata_amd.c
+++ b/drivers/ata/pata_amd.c
@@ -538,7 +538,7 @@
 
 static int amd_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
 {
-	static struct ata_port_info info[10] = {
+	static const struct ata_port_info info[10] = {
 		{	/* 0: AMD 7401 */
 			.sht = &amd_sht,
 			.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
@@ -620,7 +620,7 @@
 			.port_ops = &amd100_port_ops
 		}
 	};
-	static struct ata_port_info *port_info[2];
+	const struct ata_port_info *ppi[] = { NULL, NULL };
 	static int printed_version;
 	int type = id->driver_data;
 	u8 rev;
@@ -652,9 +652,8 @@
 		ata_pci_clear_simplex(pdev);
 
 	/* And fire it up */
-
-	port_info[0] = port_info[1] = &info[type];
-	return ata_pci_init_one(pdev, port_info, 2);
+	ppi[0] = &info[type];
+	return ata_pci_init_one(pdev, ppi);
 }
 
 #ifdef CONFIG_PM
diff --git a/drivers/ata/pata_artop.c b/drivers/ata/pata_artop.c
index ef51940..9861059 100644
--- a/drivers/ata/pata_artop.c
+++ b/drivers/ata/pata_artop.c
@@ -414,7 +414,7 @@
 static int artop_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
 {
 	static int printed_version;
-	static struct ata_port_info info_6210 = {
+	static const struct ata_port_info info_6210 = {
 		.sht		= &artop_sht,
 		.flags		= ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 		.pio_mask	= 0x1f,	/* pio0-4 */
@@ -422,7 +422,7 @@
 		.udma_mask 	= ATA_UDMA2,
 		.port_ops	= &artop6210_ops,
 	};
-	static struct ata_port_info info_626x = {
+	static const struct ata_port_info info_626x = {
 		.sht		= &artop_sht,
 		.flags		= ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 		.pio_mask	= 0x1f,	/* pio0-4 */
@@ -430,7 +430,7 @@
 		.udma_mask 	= ATA_UDMA4,
 		.port_ops	= &artop6260_ops,
 	};
-	static struct ata_port_info info_626x_fast = {
+	static const struct ata_port_info info_626x_fast = {
 		.sht		= &artop_sht,
 		.flags		= ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 		.pio_mask	= 0x1f,	/* pio0-4 */
@@ -438,32 +438,30 @@
 		.udma_mask 	= ATA_UDMA5,
 		.port_ops	= &artop6260_ops,
 	};
-	struct ata_port_info *port_info[2];
-	struct ata_port_info *info = NULL;
-	int ports = 2;
+	const struct ata_port_info *ppi[] = { NULL, NULL };
 
 	if (!printed_version++)
 		dev_printk(KERN_DEBUG, &pdev->dev,
 			   "version " DRV_VERSION "\n");
 
 	if (id->driver_data == 0) {	/* 6210 variant */
-		info = &info_6210;
+		ppi[0] = &info_6210;
+		ppi[1] = &ata_dummy_port_info;
 		/* BIOS may have left us in UDMA, clear it before libata probe */
 		pci_write_config_byte(pdev, 0x54, 0);
 		/* For the moment (also lacks dsc) */
 		printk(KERN_WARNING "ARTOP 6210 requires serialize functionality not yet supported by libata.\n");
 		printk(KERN_WARNING "Secondary ATA ports will not be activated.\n");
-		ports = 1;
 	}
 	else if (id->driver_data == 1)	/* 6260 */
-		info = &info_626x;
+		ppi[0] = &info_626x;
 	else if (id->driver_data == 2)	{ /* 6260 or 6260 + fast */
 		unsigned long io = pci_resource_start(pdev, 4);
 		u8 reg;
 
-		info = &info_626x;
+		ppi[0] = &info_626x;
 		if (inb(io) & 0x10)
-			info = &info_626x_fast;
+			ppi[0] = &info_626x_fast;
 		/* Mac systems come up with some registers not set as we
 		   will need them */
 
@@ -484,10 +482,9 @@
 
 	}
 
-	BUG_ON(info == NULL);
+	BUG_ON(ppi[0] == NULL);
 
-	port_info[0] = port_info[1] = info;
-	return ata_pci_init_one(pdev, port_info, ports);
+	return ata_pci_init_one(pdev, ppi);
 }
 
 static const struct pci_device_id artop_pci_tbl[] = {
diff --git a/drivers/ata/pata_atiixp.c b/drivers/ata/pata_atiixp.c
index 3c2264d..8449146 100644
--- a/drivers/ata/pata_atiixp.c
+++ b/drivers/ata/pata_atiixp.c
@@ -268,7 +268,7 @@
 
 static int atiixp_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 {
-	static struct ata_port_info info = {
+	static const struct ata_port_info info = {
 		.sht = &atiixp_sht,
 		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 		.pio_mask = 0x1f,
@@ -276,8 +276,8 @@
 		.udma_mask = 0x3F,
 		.port_ops = &atiixp_port_ops
 	};
-	static struct ata_port_info *port_info[2] = { &info, &info };
-	return ata_pci_init_one(dev, port_info, 2);
+	const struct ata_port_info *ppi[] = { &info, NULL };
+	return ata_pci_init_one(dev, ppi);
 }
 
 static const struct pci_device_id atiixp[] = {
diff --git a/drivers/ata/pata_cmd640.c b/drivers/ata/pata_cmd640.c
index 987dec9..ed00fa9 100644
--- a/drivers/ata/pata_cmd640.c
+++ b/drivers/ata/pata_cmd640.c
@@ -249,17 +249,16 @@
 
 static int cmd640_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 = &cmd640_sht,
 		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 		.pio_mask = 0x1f,
 		.port_ops = &cmd640_port_ops
 	};
-
-	static struct ata_port_info *port_info[2] = { &info, &info };
+	const struct ata_port_info *ppi[] = { &info, NULL };
 
 	cmd640_hardware_init(pdev);
-	return ata_pci_init_one(pdev, port_info, 2);
+	return ata_pci_init_one(pdev, ppi);
 }
 
 static int cmd640_reinit_one(struct pci_dev *pdev)
diff --git a/drivers/ata/pata_cmd64x.c b/drivers/ata/pata_cmd64x.c
index 3e02c6a..2a79b33 100644
--- a/drivers/ata/pata_cmd64x.c
+++ b/drivers/ata/pata_cmd64x.c
@@ -377,7 +377,7 @@
 {
 	u32 class_rev;
 
-	static struct ata_port_info cmd_info[6] = {
+	static const struct ata_port_info cmd_info[6] = {
 		{	/* CMD 643 - no UDMA */
 			.sht = &cmd64x_sht,
 			.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
@@ -424,11 +424,9 @@
 			.port_ops = &cmd648_port_ops
 		}
 	};
-	static struct ata_port_info *port_info[2], *info;
+	const struct ata_port_info *ppi[] = { &cmd_info[id->driver_data], NULL };
 	u8 mrdmode;
 
-	info = &cmd_info[id->driver_data];
-
 	pci_read_config_dword(pdev, PCI_CLASS_REVISION, &class_rev);
 	class_rev &= 0xFF;
 
@@ -438,10 +436,10 @@
 	if (pdev->device == PCI_DEVICE_ID_CMD_646) {
 		/* Does UDMA work ? */
 		if (class_rev > 4)
-			info = &cmd_info[2];
+			ppi[0] = &cmd_info[2];
 		/* Early rev with other problems ? */
 		else if (class_rev == 1)
-			info = &cmd_info[3];
+			ppi[0] = &cmd_info[3];
 	}
 
 	pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 64);
@@ -457,8 +455,7 @@
 	pci_write_config_byte(pdev, UDIDETCR0, 0xF0);
 #endif
 
-	port_info[0] = port_info[1] = info;
-	return ata_pci_init_one(pdev, port_info, 2);
+	return ata_pci_init_one(pdev, ppi);
 }
 
 #ifdef CONFIG_PM
diff --git a/drivers/ata/pata_cs5530.c b/drivers/ata/pata_cs5530.c
index 637d8b3..1b67923 100644
--- a/drivers/ata/pata_cs5530.c
+++ b/drivers/ata/pata_cs5530.c
@@ -335,7 +335,7 @@
 
 static int cs5530_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 = &cs5530_sht,
 		.flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST,
 		.pio_mask = 0x1f,
@@ -344,23 +344,23 @@
 		.port_ops = &cs5530_port_ops
 	};
 	/* The docking connector doesn't do UDMA, and it seems not MWDMA */
-	static struct ata_port_info info_palmax_secondary = {
+	static const struct ata_port_info info_palmax_secondary = {
 		.sht = &cs5530_sht,
 		.flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST,
 		.pio_mask = 0x1f,
 		.port_ops = &cs5530_port_ops
 	};
-	static struct ata_port_info *port_info[2] = { &info, &info };
+	const struct ata_port_info *ppi[] = { &info, NULL };
 
 	/* Chip initialisation */
 	if (cs5530_init_chip())
 		return -ENODEV;
 
 	if (cs5530_is_palmax())
-		port_info[1] = &info_palmax_secondary;
+		ppi[1] = &info_palmax_secondary;
 
 	/* Now kick off ATA set up */
-	return ata_pci_init_one(pdev, port_info, 2);
+	return ata_pci_init_one(pdev, ppi);
 }
 
 #ifdef CONFIG_PM
diff --git a/drivers/ata/pata_cs5535.c b/drivers/ata/pata_cs5535.c
index 683885a..f37d4cd 100644
--- a/drivers/ata/pata_cs5535.c
+++ b/drivers/ata/pata_cs5535.c
@@ -223,7 +223,7 @@
 
 static int cs5535_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 {
-	static struct ata_port_info info = {
+	static const struct ata_port_info info = {
 		.sht = &cs5535_sht,
 		.flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST,
 		.pio_mask = 0x1f,
@@ -231,7 +231,7 @@
 		.udma_mask = 0x1f,
 		.port_ops = &cs5535_port_ops
 	};
-	struct ata_port_info *ports[1] = { &info };
+	const struct ata_port_info *ppi[] = { &info, &ata_dummy_port_info };
 
 	u32 timings, dummy;
 
@@ -243,7 +243,7 @@
 	rdmsr(ATAC_CH0D1_PIO, timings, dummy);
 	if (CS5535_BAD_PIO(timings))
 		wrmsr(ATAC_CH0D1_PIO, 0xF7F4F7F4UL, 0);
-	return ata_pci_init_one(dev, ports, 1);
+	return ata_pci_init_one(dev, ppi);
 }
 
 static const struct pci_device_id cs5535[] = {
diff --git a/drivers/ata/pata_cypress.c b/drivers/ata/pata_cypress.c
index 30e5c54..27b9f29 100644
--- a/drivers/ata/pata_cypress.c
+++ b/drivers/ata/pata_cypress.c
@@ -165,14 +165,14 @@
 
 static int cy82c693_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 = &cy82c693_sht,
 		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 		.pio_mask = 0x1f,
 		.mwdma_mask = 0x07,
 		.port_ops = &cy82c693_port_ops
 	};
-	static struct ata_port_info *port_info[1] = { &info };
+	const struct ata_port_info *ppi[] = { &info, &ata_dummy_port_info };
 
 	/* Devfn 1 is the ATA primary. The secondary is magic and on devfn2.
 	   For the moment we don't handle the secondary. FIXME */
@@ -180,7 +180,7 @@
 	if (PCI_FUNC(pdev->devfn) != 1)
 		return -ENODEV;
 
-	return ata_pci_init_one(pdev, port_info, 1);
+	return ata_pci_init_one(pdev, ppi);
 }
 
 static const struct pci_device_id cy82c693[] = {
diff --git a/drivers/ata/pata_efar.c b/drivers/ata/pata_efar.c
index 23e929f..079248a 100644
--- a/drivers/ata/pata_efar.c
+++ b/drivers/ata/pata_efar.c
@@ -301,7 +301,7 @@
 static int efar_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		= &efar_sht,
 		.flags		= ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 		.pio_mask	= 0x1f,	/* pio0-4 */
@@ -309,13 +309,13 @@
 		.udma_mask 	= 0x0f, /* UDMA 66 */
 		.port_ops	= &efar_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 efar_pci_tbl[] = {
diff --git a/drivers/ata/pata_hpt366.c b/drivers/ata/pata_hpt366.c
index cb965f4..c6c8a8b 100644
--- a/drivers/ata/pata_hpt366.c
+++ b/drivers/ata/pata_hpt366.c
@@ -417,7 +417,7 @@
 
 static int hpt36x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 {
-	static struct ata_port_info info_hpt366 = {
+	static const struct ata_port_info info_hpt366 = {
 		.sht = &hpt36x_sht,
 		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 		.pio_mask = 0x1f,
@@ -425,7 +425,8 @@
 		.udma_mask = 0x1f,
 		.port_ops = &hpt366_port_ops
 	};
-	struct ata_port_info *port_info[2] = {&info_hpt366, &info_hpt366};
+	struct ata_port_info info = info_hpt366;
+	const struct ata_port_info *ppi[] = { &info, NULL };
 
 	u32 class_rev;
 	u32 reg1;
@@ -446,17 +447,17 @@
 	/* info_hpt366 is safe against re-entry so we can scribble on it */
 	switch((reg1 & 0x700) >> 8) {
 		case 5:
-			info_hpt366.private_data = &hpt366_40;
+			info.private_data = &hpt366_40;
 			break;
 		case 9:
-			info_hpt366.private_data = &hpt366_25;
+			info.private_data = &hpt366_25;
 			break;
 		default:
-			info_hpt366.private_data = &hpt366_33;
+			info.private_data = &hpt366_33;
 			break;
 	}
 	/* Now kick off ATA set up */
-	return ata_pci_init_one(dev, port_info, 2);
+	return ata_pci_init_one(dev, ppi);
 }
 
 #ifdef CONFIG_PM
diff --git a/drivers/ata/pata_hpt37x.c b/drivers/ata/pata_hpt37x.c
index 1614e8c..5a0a410 100644
--- a/drivers/ata/pata_hpt37x.c
+++ b/drivers/ata/pata_hpt37x.c
@@ -887,7 +887,7 @@
 static int hpt37x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 {
 	/* HPT370 - UDMA100 */
-	static struct ata_port_info info_hpt370 = {
+	static const struct ata_port_info info_hpt370 = {
 		.sht = &hpt37x_sht,
 		.flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST,
 		.pio_mask = 0x1f,
@@ -896,7 +896,7 @@
 		.port_ops = &hpt370_port_ops
 	};
 	/* HPT370A - UDMA100 */
-	static struct ata_port_info info_hpt370a = {
+	static const struct ata_port_info info_hpt370a = {
 		.sht = &hpt37x_sht,
 		.flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST,
 		.pio_mask = 0x1f,
@@ -905,7 +905,7 @@
 		.port_ops = &hpt370a_port_ops
 	};
 	/* HPT370 - UDMA100 */
-	static struct ata_port_info info_hpt370_33 = {
+	static const struct ata_port_info info_hpt370_33 = {
 		.sht = &hpt37x_sht,
 		.flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST,
 		.pio_mask = 0x1f,
@@ -914,7 +914,7 @@
 		.port_ops = &hpt370_port_ops
 	};
 	/* HPT370A - UDMA100 */
-	static struct ata_port_info info_hpt370a_33 = {
+	static const struct ata_port_info info_hpt370a_33 = {
 		.sht = &hpt37x_sht,
 		.flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST,
 		.pio_mask = 0x1f,
@@ -923,7 +923,7 @@
 		.port_ops = &hpt370a_port_ops
 	};
 	/* HPT371, 372 and friends - UDMA133 */
-	static struct ata_port_info info_hpt372 = {
+	static const struct ata_port_info info_hpt372 = {
 		.sht = &hpt37x_sht,
 		.flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST,
 		.pio_mask = 0x1f,
@@ -932,7 +932,7 @@
 		.port_ops = &hpt372_port_ops
 	};
 	/* HPT371, 372 and friends - UDMA100 at 50MHz clock */
-	static struct ata_port_info info_hpt372_50 = {
+	static const struct ata_port_info info_hpt372_50 = {
 		.sht = &hpt37x_sht,
 		.flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST,
 		.pio_mask = 0x1f,
@@ -941,7 +941,7 @@
 		.port_ops = &hpt372_port_ops
 	};
 	/* HPT374 - UDMA133 */
-	static struct ata_port_info info_hpt374 = {
+	static const struct ata_port_info info_hpt374 = {
 		.sht = &hpt37x_sht,
 		.flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST,
 		.pio_mask = 0x1f,
@@ -951,9 +951,10 @@
 	};
 
 	static const int MHz[4] = { 33, 40, 50, 66 };
-
-	struct ata_port_info *port_info[2];
-	struct ata_port_info *port;
+	const struct ata_port_info *port;
+	void *private_data = NULL;
+	struct ata_port_info port_info;
+	const struct ata_port_info *ppi[] = { &port_info, NULL };
 
 	u8 irqmask;
 	u32 class_rev;
@@ -1124,13 +1125,13 @@
 			return -ENODEV;
 		}
 		if (clock_slot == 3)
-			port->private_data = (void *)hpt37x_timings_66;
+			private_data = (void *)hpt37x_timings_66;
 		else
-			port->private_data = (void *)hpt37x_timings_50;
+			private_data = (void *)hpt37x_timings_50;
 
 		printk(KERN_INFO "hpt37x: Bus clock %dMHz, using DPLL.\n", MHz[clock_slot]);
 	} else {
-		port->private_data = (void *)chip_table->clocks[clock_slot];
+		private_data = (void *)chip_table->clocks[clock_slot];
 		/*
 		 *	Perform a final fixup. Note that we will have used the
 		 *	DPLL on the HPT372 which means we don't have to worry
@@ -1144,9 +1145,11 @@
 		printk(KERN_INFO "hpt37x: %s: Bus clock %dMHz.\n", chip_table->name, MHz[clock_slot]);
 	}
 
-	port_info[0] = port_info[1] = port;
 	/* Now kick off ATA set up */
-	return ata_pci_init_one(dev, port_info, 2);
+	port_info = *port;
+	port_info.private_data = private_data;
+
+	return ata_pci_init_one(dev, ppi);
 }
 
 static const struct pci_device_id hpt37x[] = {
diff --git a/drivers/ata/pata_hpt3x2n.c b/drivers/ata/pata_hpt3x2n.c
index ea1037d..f25154a 100644
--- a/drivers/ata/pata_hpt3x2n.c
+++ b/drivers/ata/pata_hpt3x2n.c
@@ -488,7 +488,7 @@
 static int hpt3x2n_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 {
 	/* HPT372N and friends - UDMA133 */
-	static struct ata_port_info info = {
+	static const struct ata_port_info info = {
 		.sht = &hpt3x2n_sht,
 		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 		.pio_mask = 0x1f,
@@ -496,8 +496,8 @@
 		.udma_mask = 0x7f,
 		.port_ops = &hpt3x2n_port_ops
 	};
-	struct ata_port_info *port_info[2];
-	struct ata_port_info *port = &info;
+	struct ata_port_info port = info;
+	const struct ata_port_info *ppi[] = { &port, NULL };
 
 	u8 irqmask;
 	u32 class_rev;
@@ -585,9 +585,9 @@
 
 	/* Set our private data up. We only need a few flags so we use
 	   it directly */
-	port->private_data = NULL;
+	port.private_data = NULL;
 	if (pci_mhz > 60) {
-		port->private_data = (void *)PCI66;
+		port.private_data = (void *)PCI66;
 		/*
 		 * On  HPT371N, if ATA clock is 66 MHz we must set bit 2 in
 		 * the MISC. register to stretch the UltraDMA Tss timing.
@@ -598,8 +598,7 @@
 	}
 
 	/* Now kick off ATA set up */
-	port_info[0] = port_info[1] = port;
-	return ata_pci_init_one(dev, port_info, 2);
+	return ata_pci_init_one(dev, ppi);
 }
 
 static const struct pci_device_id hpt3x2n[] = {
diff --git a/drivers/ata/pata_hpt3x3.c b/drivers/ata/pata_hpt3x3.c
index 84c636b..bbabe79 100644
--- a/drivers/ata/pata_hpt3x3.c
+++ b/drivers/ata/pata_hpt3x3.c
@@ -171,7 +171,7 @@
 
 static int hpt3x3_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 {
-	static struct ata_port_info info = {
+	static const struct ata_port_info info = {
 		.sht = &hpt3x3_sht,
 		.flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST,
 		.pio_mask = 0x1f,
@@ -179,11 +179,11 @@
 		.udma_mask = 0x07,
 		.port_ops = &hpt3x3_port_ops
 	};
-	static struct ata_port_info *port_info[2] = { &info, &info };
+	const struct ata_port_info *ppi[] = { &info, NULL };
 
 	hpt3x3_init_chipset(dev);
 	/* Now kick off ATA set up */
-	return ata_pci_init_one(dev, port_info, 2);
+	return ata_pci_init_one(dev, ppi);
 }
 
 #ifdef CONFIG_PM
diff --git a/drivers/ata/pata_it8213.c b/drivers/ata/pata_it8213.c
index bf3aaa20..a769952 100644
--- a/drivers/ata/pata_it8213.c
+++ b/drivers/ata/pata_it8213.c
@@ -311,7 +311,7 @@
 static int it8213_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		= &it8213_sht,
 		.flags		= ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 		.pio_mask	= 0x1f,	/* pio0-4 */
@@ -319,14 +319,14 @@
 		.udma_mask 	= 0x1f, /* UDMA 100 */
 		.port_ops	= &it8213_ops,
 	};
-	static struct ata_port_info *port_info[2] = { &info, &info };
+	/* Current IT8213 stuff is single port */
+	const struct ata_port_info *ppi[] = { &info, &ata_dummy_port_info };
 
 	if (!printed_version++)
 		dev_printk(KERN_DEBUG, &pdev->dev,
 			   "version " DRV_VERSION "\n");
 
-	/* Current IT8213 stuff is single port */
-	return ata_pci_init_one(pdev, port_info, 1);
+	return ata_pci_init_one(pdev, ppi);
 }
 
 static const struct pci_device_id it8213_pci_tbl[] = {
diff --git a/drivers/ata/pata_it821x.c b/drivers/ata/pata_it821x.c
index 8e565a5..ff9a6fd 100644
--- a/drivers/ata/pata_it821x.c
+++ b/drivers/ata/pata_it821x.c
@@ -718,14 +718,14 @@
 {
 	u8 conf;
 
-	static struct ata_port_info info_smart = {
+	static const struct ata_port_info info_smart = {
 		.sht = &it821x_sht,
 		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 		.pio_mask = 0x1f,
 		.mwdma_mask = 0x07,
 		.port_ops = &it821x_smart_port_ops
 	};
-	static struct ata_port_info info_passthru = {
+	static const struct ata_port_info info_passthru = {
 		.sht = &it821x_sht,
 		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 		.pio_mask = 0x1f,
@@ -733,8 +733,8 @@
 		.udma_mask = 0x7f,
 		.port_ops = &it821x_passthru_port_ops
 	};
-	static struct ata_port_info *port_info[2];
 
+	const struct ata_port_info *ppi[] = { NULL, NULL };
 	static char *mode[2] = { "pass through", "smart" };
 
 	/* Force the card into bypass mode if so requested */
@@ -747,11 +747,11 @@
 
 	printk(KERN_INFO DRV_NAME ": controller in %s mode.\n", mode[conf]);
 	if (conf == 0)
-		port_info[0] = port_info[1] = &info_passthru;
+		ppi[0] = &info_passthru;
 	else
-		port_info[0] = port_info[1] = &info_smart;
+		ppi[0] = &info_smart;
 
-	return ata_pci_init_one(pdev, port_info, 2);
+	return ata_pci_init_one(pdev, ppi);
 }
 
 #ifdef CONFIG_PM
diff --git a/drivers/ata/pata_jmicron.c b/drivers/ata/pata_jmicron.c
index 1aa7bc2..8d799e8 100644
--- a/drivers/ata/pata_jmicron.c
+++ b/drivers/ata/pata_jmicron.c
@@ -191,7 +191,7 @@
 
 static int jmicron_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		= &jmicron_sht,
 		.flags	= ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 
@@ -201,9 +201,9 @@
 
 		.port_ops	= &jmicron_ops,
 	};
-	struct ata_port_info *port_info[2] = { &info, &info };
+	const struct ata_port_info *ppi[] = { &info, NULL };
 
-	return ata_pci_init_one(pdev, port_info, 2);
+	return ata_pci_init_one(pdev, ppi);
 }
 
 static const struct pci_device_id jmicron_pci_tbl[] = {
diff --git a/drivers/ata/pata_marvell.c b/drivers/ata/pata_marvell.c
index 2745e23..edbfe0d 100644
--- a/drivers/ata/pata_marvell.c
+++ b/drivers/ata/pata_marvell.c
@@ -161,7 +161,7 @@
 
 static int marvell_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		= &marvell_sht,
 		.flags		= ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 
@@ -171,7 +171,7 @@
 
 		.port_ops	= &marvell_ops,
 	};
-	static struct ata_port_info info_sata = {
+	static const struct ata_port_info info_sata = {
 		.sht		= &marvell_sht,
 		/* Slave possible as its magically mapped not real */
 		.flags		= ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
@@ -182,13 +182,12 @@
 
 		.port_ops	= &marvell_ops,
 	};
-	struct ata_port_info *port_info[2] = { &info, &info_sata };
-	int n_port = 2;
+	const struct ata_port_info *ppi[] = { &info, &info_sata };
 
 	if (pdev->device == 0x6101)
-		n_port = 1;
+		ppi[1] = &ata_dummy_port_info;
 
-	return ata_pci_init_one(pdev, port_info, n_port);
+	return ata_pci_init_one(pdev, ppi);
 }
 
 static const struct pci_device_id marvell_pci_tbl[] = {
diff --git a/drivers/ata/pata_netcell.c b/drivers/ata/pata_netcell.c
index f15eb34..81f5634 100644
--- a/drivers/ata/pata_netcell.c
+++ b/drivers/ata/pata_netcell.c
@@ -92,7 +92,7 @@
 static int netcell_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		= &netcell_sht,
 		.flags		= ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 		/* Actually we don't really care about these as the
@@ -102,7 +102,7 @@
 		.udma_mask 	= 0x3f, /* UDMA 133 */
 		.port_ops	= &netcell_ops,
 	};
-	static struct ata_port_info *port_info[2] = { &info, &info };
+	const struct ata_port_info *port_info[] = { &info, NULL };
 
 	if (!printed_version++)
 		dev_printk(KERN_DEBUG, &pdev->dev,
@@ -112,7 +112,7 @@
 	ata_pci_clear_simplex(pdev);
 
 	/* And let the library code do the work */
-	return ata_pci_init_one(pdev, port_info, 2);
+	return ata_pci_init_one(pdev, port_info);
 }
 
 static const struct pci_device_id netcell_pci_tbl[] = {
diff --git a/drivers/ata/pata_ns87410.c b/drivers/ata/pata_ns87410.c
index d5eb42b..ea70ec7 100644
--- a/drivers/ata/pata_ns87410.c
+++ b/drivers/ata/pata_ns87410.c
@@ -191,14 +191,14 @@
 
 static int ns87410_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 {
-	static struct ata_port_info info = {
+	static const struct ata_port_info info = {
 		.sht = &ns87410_sht,
 		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 		.pio_mask = 0x0F,
 		.port_ops = &ns87410_port_ops
 	};
-	static struct ata_port_info *port_info[2] = {&info, &info};
-	return ata_pci_init_one(dev, port_info, 2);
+	const struct ata_port_info *ppi[] = { &info, NULL };
+	return ata_pci_init_one(dev, ppi);
 }
 
 static const struct pci_device_id ns87410[] = {
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[] = {
diff --git a/drivers/ata/pata_opti.c b/drivers/ata/pata_opti.c
index 944b7084..1c44653 100644
--- a/drivers/ata/pata_opti.c
+++ b/drivers/ata/pata_opti.c
@@ -216,19 +216,19 @@
 
 static int opti_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 {
-	static struct ata_port_info info = {
+	static const struct ata_port_info info = {
 		.sht = &opti_sht,
 		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 		.pio_mask = 0x1f,
 		.port_ops = &opti_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++)
 		dev_printk(KERN_DEBUG, &dev->dev, "version " DRV_VERSION "\n");
 
-	return ata_pci_init_one(dev, port_info, 2);
+	return ata_pci_init_one(dev, ppi);
 }
 
 static const struct pci_device_id opti[] = {
diff --git a/drivers/ata/pata_optidma.c b/drivers/ata/pata_optidma.c
index 875ac4a..3093b02 100644
--- a/drivers/ata/pata_optidma.c
+++ b/drivers/ata/pata_optidma.c
@@ -482,14 +482,14 @@
 
 static int optidma_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 {
-	static struct ata_port_info info_82c700 = {
+	static const struct ata_port_info info_82c700 = {
 		.sht = &optidma_sht,
 		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 		.pio_mask = 0x1f,
 		.mwdma_mask = 0x07,
 		.port_ops = &optidma_port_ops
 	};
-	static struct ata_port_info info_82c700_udma = {
+	static const struct ata_port_info info_82c700_udma = {
 		.sht = &optidma_sht,
 		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 		.pio_mask = 0x1f,
@@ -497,8 +497,7 @@
 		.udma_mask = 0x07,
 		.port_ops = &optiplus_port_ops
 	};
-	static struct ata_port_info *port_info[2];
-	struct ata_port_info *info = &info_82c700;
+	const struct ata_port_info *ppi[] = { &info_82c700, NULL };
 	static int printed_version;
 
 	if (!printed_version++)
@@ -510,10 +509,9 @@
 	pci_clock = inb(0x1F5) & 1;		/* 0 = 33Mhz, 1 = 25Mhz */
 
 	if (optiplus_with_udma(dev))
-		info = &info_82c700_udma;
+		ppi[0] = &info_82c700_udma;
 
-	port_info[0] = port_info[1] = info;
-	return ata_pci_init_one(dev, port_info, 2);
+	return ata_pci_init_one(dev, ppi);
 }
 
 static const struct pci_device_id optidma[] = {
diff --git a/drivers/ata/pata_pdc202xx_old.c b/drivers/ata/pata_pdc202xx_old.c
index 3e204c3..edbaf9d 100644
--- a/drivers/ata/pata_pdc202xx_old.c
+++ b/drivers/ata/pata_pdc202xx_old.c
@@ -317,7 +317,7 @@
 
 static int pdc202xx_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 {
-	static struct ata_port_info info[3] = {
+	static const struct ata_port_info info[3] = {
 		{
 			.sht = &pdc202xx_sht,
 			.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
@@ -344,9 +344,7 @@
 		}
 
 	};
-	static struct ata_port_info *port_info[2];
-
-	port_info[0] = port_info[1] = &info[id->driver_data];
+	const struct ata_port_info *ppi[] = { &info[id->driver_data], NULL };
 
 	if (dev->device == PCI_DEVICE_ID_PROMISE_20265) {
 		struct pci_dev *bridge = dev->bus->self;
@@ -358,7 +356,7 @@
 				return -ENODEV;
 		}
 	}
-	return ata_pci_init_one(dev, port_info, 2);
+	return ata_pci_init_one(dev, ppi);
 }
 
 static const struct pci_device_id pdc202xx[] = {
diff --git a/drivers/ata/pata_radisys.c b/drivers/ata/pata_radisys.c
index bc01b17..ba96b54 100644
--- a/drivers/ata/pata_radisys.c
+++ b/drivers/ata/pata_radisys.c
@@ -255,7 +255,7 @@
 static int radisys_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		= &radisys_sht,
 		.flags		= ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 		.pio_mask	= 0x1f,	/* pio0-4 */
@@ -263,13 +263,13 @@
 		.udma_mask	= 0x14, /* UDMA33/66 only */
 		.port_ops	= &radisys_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 radisys_pci_tbl[] = {
diff --git a/drivers/ata/pata_rz1000.c b/drivers/ata/pata_rz1000.c
index 97785b4..2bfd7ef 100644
--- a/drivers/ata/pata_rz1000.c
+++ b/drivers/ata/pata_rz1000.c
@@ -131,22 +131,20 @@
 static int rz1000_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 {
 	static int printed_version;
-	struct ata_port_info *port_info[2];
-	static struct ata_port_info info = {
+	static const struct ata_port_info info = {
 		.sht = &rz1000_sht,
 		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 		.pio_mask = 0x1f,
 		.port_ops = &rz1000_port_ops
 	};
+	const struct ata_port_info *ppi[] = { &info, NULL };
 
 	if (!printed_version++)
 		printk(KERN_DEBUG DRV_NAME " version " DRV_VERSION "\n");
 
-	if (rz1000_fifo_disable(pdev) == 0) {
-		port_info[0] = &info;
-		port_info[1] = &info;
-		return ata_pci_init_one(pdev, port_info, 2);
-	}
+	if (rz1000_fifo_disable(pdev) == 0)
+		return ata_pci_init_one(pdev, ppi);
+
 	printk(KERN_ERR DRV_NAME ": failed to disable read-ahead on chipset..\n");
 	/* Not safe to use so skip */
 	return -ENODEV;
diff --git a/drivers/ata/pata_sc1200.c b/drivers/ata/pata_sc1200.c
index 2af9f8c..225013e 100644
--- a/drivers/ata/pata_sc1200.c
+++ b/drivers/ata/pata_sc1200.c
@@ -243,7 +243,7 @@
 
 static int sc1200_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 {
-	static struct ata_port_info info = {
+	static const struct ata_port_info info = {
 		.sht = &sc1200_sht,
 		.flags = ATA_FLAG_SLAVE_POSS|ATA_FLAG_SRST,
 		.pio_mask = 0x1f,
@@ -251,10 +251,10 @@
 		.udma_mask = 0x07,
 		.port_ops = &sc1200_port_ops
 	};
-	static struct ata_port_info *port_info[2] = { &info, &info };
-
 	/* Can't enable port 2 yet, see top comments */
-	return ata_pci_init_one(dev, port_info, 1);
+	const struct ata_port_info *ppi[] = { &info, &ata_dummy_port_info };
+
+	return ata_pci_init_one(dev, ppi);
 }
 
 static const struct pci_device_id sc1200[] = {
diff --git a/drivers/ata/pata_serverworks.c b/drivers/ata/pata_serverworks.c
index 8bbe426..dee6e21 100644
--- a/drivers/ata/pata_serverworks.c
+++ b/drivers/ata/pata_serverworks.c
@@ -475,8 +475,7 @@
 
 static int serverworks_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
 {
-	int ports = 2;
-	static struct ata_port_info info[4] = {
+	static const struct ata_port_info info[4] = {
 		{ /* OSB4 */
 			.sht = &serverworks_sht,
 			.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
@@ -507,8 +506,7 @@
 			.port_ops = &serverworks_csb_port_ops
 		}
 	};
-	static struct ata_port_info *port_info[2];
-	struct ata_port_info *devinfo = &info[id->driver_data];
+	const struct ata_port_info *ppi[] = { &info[id->driver_data], NULL };
 
 	/* Force master latency timer to 64 PCI clocks */
 	pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0x40);
@@ -517,7 +515,7 @@
 	if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_OSB4IDE) {
 		/* Select non UDMA capable OSB4 if we can't do fixups */
 		if ( serverworks_fixup_osb4(pdev) < 0)
-			devinfo = &info[1];
+			ppi[0] = &info[1];
 	}
 	/* setup CSB5/CSB6 : South Bridge and IDE option RAID */
 	else if ((pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE) ||
@@ -527,11 +525,11 @@
 		 /* If the returned btr is the newer revision then
 		    select the right info block */
 		 if (serverworks_fixup_csb(pdev) == 3)
-		 	devinfo = &info[3];
+		 	ppi[0] = &info[3];
 
 		/* Is this the 3rd channel CSB6 IDE ? */
 		if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB6IDE2)
-			ports = 1;
+			ppi[1] = &ata_dummy_port_info;
 	}
 	/* setup HT1000E */
 	else if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_HT1000IDE)
@@ -540,8 +538,7 @@
 	if (pdev->device == PCI_DEVICE_ID_SERVERWORKS_CSB5IDE)
 		ata_pci_clear_simplex(pdev);
 
-	port_info[0] = port_info[1] = devinfo;
-	return ata_pci_init_one(pdev, port_info, ports);
+	return ata_pci_init_one(pdev, ppi);
 }
 
 #ifdef CONFIG_PM
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
diff --git a/drivers/ata/pata_sis.c b/drivers/ata/pata_sis.c
index 9b3774a..f223126 100644
--- a/drivers/ata/pata_sis.c
+++ b/drivers/ata/pata_sis.c
@@ -38,8 +38,8 @@
 #define DRV_VERSION	"0.5.1"
 
 struct sis_chipset {
-	u16 device;			/* PCI host ID */
-	struct ata_port_info *info;	/* Info block */
+	u16 device;				/* PCI host ID */
+	const struct ata_port_info *info;	/* Info block */
 	/* Probably add family, cable detect type etc here to clean
 	   up code later */
 };
@@ -696,7 +696,7 @@
 	.port_start		= ata_port_start,
 };
 
-static struct ata_port_info sis_info = {
+static const struct ata_port_info sis_info = {
 	.sht		= &sis_sht,
 	.flags		= ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 	.pio_mask	= 0x1f,	/* pio0-4 */
@@ -704,7 +704,7 @@
 	.udma_mask	= 0,
 	.port_ops	= &sis_old_ops,
 };
-static struct ata_port_info sis_info33 = {
+static const struct ata_port_info sis_info33 = {
 	.sht		= &sis_sht,
 	.flags		= ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 	.pio_mask	= 0x1f,	/* pio0-4 */
@@ -712,35 +712,35 @@
 	.udma_mask	= ATA_UDMA2,	/* UDMA 33 */
 	.port_ops	= &sis_old_ops,
 };
-static struct ata_port_info sis_info66 = {
+static const struct ata_port_info sis_info66 = {
 	.sht		= &sis_sht,
 	.flags		= ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 	.pio_mask	= 0x1f,	/* pio0-4 */
 	.udma_mask	= ATA_UDMA4,	/* UDMA 66 */
 	.port_ops	= &sis_66_ops,
 };
-static struct ata_port_info sis_info100 = {
+static const struct ata_port_info sis_info100 = {
 	.sht		= &sis_sht,
 	.flags		= ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 	.pio_mask	= 0x1f,	/* pio0-4 */
 	.udma_mask	= ATA_UDMA5,
 	.port_ops	= &sis_100_ops,
 };
-static struct ata_port_info sis_info100_early = {
+static const struct ata_port_info sis_info100_early = {
 	.sht		= &sis_sht,
 	.flags		= ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 	.udma_mask	= ATA_UDMA5,
 	.pio_mask	= 0x1f,	/* pio0-4 */
 	.port_ops	= &sis_66_ops,
 };
-struct ata_port_info sis_info133 = {
+const struct ata_port_info sis_info133 = {
 	.sht		= &sis_sht,
 	.flags		= ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 	.pio_mask	= 0x1f,	/* pio0-4 */
 	.udma_mask	= ATA_UDMA6,
 	.port_ops	= &sis_133_ops,
 };
-static struct ata_port_info sis_info133_early = {
+static const struct ata_port_info sis_info133_early = {
 	.sht		= &sis_sht,
 	.flags		= ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 	.pio_mask	= 0x1f,	/* pio0-4 */
@@ -823,8 +823,8 @@
 static int sis_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 {
 	static int printed_version;
-	static struct ata_port_info *port_info[2];
-	struct ata_port_info *port;
+	struct ata_port_info port;
+	const struct ata_port_info *ppi[] = { &port, NULL };
 	struct pci_dev *host = NULL;
 	struct sis_chipset *chipset = NULL;
 	struct sis_chipset *sets;
@@ -964,13 +964,12 @@
 	if (chipset == NULL)
 		return -ENODEV;
 
-	port = chipset->info;
-	port->private_data = chipset;
+	port = *chipset->info;
+	port.private_data = chipset;
 
 	sis_fixup(pdev, chipset);
 
-	port_info[0] = port_info[1] = port;
-	return ata_pci_init_one(pdev, port_info, 2);
+	return ata_pci_init_one(pdev, ppi);
 }
 
 static const struct pci_device_id sis_pci_tbl[] = {
diff --git a/drivers/ata/pata_sl82c105.c b/drivers/ata/pata_sl82c105.c
index 9aeffdb..f48491a 100644
--- a/drivers/ata/pata_sl82c105.c
+++ b/drivers/ata/pata_sl82c105.c
@@ -301,20 +301,22 @@
 
 static int sl82c105_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 {
-	static struct ata_port_info info_dma = {
+	static const struct ata_port_info info_dma = {
 		.sht = &sl82c105_sht,
 		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 		.pio_mask = 0x1f,
 		.mwdma_mask = 0x07,
 		.port_ops = &sl82c105_port_ops
 	};
-	static struct ata_port_info info_early = {
+	static const struct ata_port_info info_early = {
 		.sht = &sl82c105_sht,
 		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 		.pio_mask = 0x1f,
 		.port_ops = &sl82c105_port_ops
 	};
-	static struct ata_port_info *port_info[2] = { &info_early, &info_early };
+	/* for now use only the first port */
+	const struct ata_port_info *ppi[] = { &info_early,
+					       &ata_dummy_port_info };
 	u32 val;
 	int rev;
 
@@ -324,17 +326,14 @@
 		dev_printk(KERN_WARNING, &dev->dev, "pata_sl82c105: Unable to find bridge, disabling DMA.\n");
 	else if (rev <= 5)
 		dev_printk(KERN_WARNING, &dev->dev, "pata_sl82c105: Early bridge revision, no DMA available.\n");
-	else {
-		port_info[0] = &info_dma;
-		port_info[1] = &info_dma;
-	}
+	else
+		ppi[0] = &info_dma;
 
 	pci_read_config_dword(dev, 0x40, &val);
 	val |= CTRL_P0EN | CTRL_P0F16 | CTRL_P1F16;
 	pci_write_config_dword(dev, 0x40, val);
 
-
-	return ata_pci_init_one(dev, port_info, 1); /* For now */
+	return ata_pci_init_one(dev, ppi);
 }
 
 static const struct pci_device_id sl82c105[] = {
diff --git a/drivers/ata/pata_triflex.c b/drivers/ata/pata_triflex.c
index 045f9d28..b1d3076 100644
--- a/drivers/ata/pata_triflex.c
+++ b/drivers/ata/pata_triflex.c
@@ -233,20 +233,20 @@
 
 static int triflex_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 {
-	static struct ata_port_info info = {
+	static const struct ata_port_info info = {
 		.sht = &triflex_sht,
 		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SRST,
 		.pio_mask = 0x1f,
 		.mwdma_mask = 0x07,
 		.port_ops = &triflex_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++)
 		dev_printk(KERN_DEBUG, &dev->dev, "version " DRV_VERSION "\n");
 
-	return ata_pci_init_one(dev, port_info, 2);
+	return ata_pci_init_one(dev, ppi);
 }
 
 static const struct pci_device_id triflex[] = {
diff --git a/drivers/ata/pata_via.c b/drivers/ata/pata_via.c
index 3740644..e4c71f7 100644
--- a/drivers/ata/pata_via.c
+++ b/drivers/ata/pata_via.c
@@ -421,7 +421,7 @@
 static int via_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
 {
 	/* Early VIA without UDMA support */
-	static struct ata_port_info via_mwdma_info = {
+	static const struct ata_port_info via_mwdma_info = {
 		.sht = &via_sht,
 		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SETXFER_POLLING,
 		.pio_mask = 0x1f,
@@ -429,7 +429,7 @@
 		.port_ops = &via_port_ops
 	};
 	/* Ditto with IRQ masking required */
-	static struct ata_port_info via_mwdma_info_borked = {
+	static const struct ata_port_info via_mwdma_info_borked = {
 		.sht = &via_sht,
 		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SETXFER_POLLING,
 		.pio_mask = 0x1f,
@@ -437,7 +437,7 @@
 		.port_ops = &via_port_ops_noirq,
 	};
 	/* VIA UDMA 33 devices (and borked 66) */
-	static struct ata_port_info via_udma33_info = {
+	static const struct ata_port_info via_udma33_info = {
 		.sht = &via_sht,
 		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SETXFER_POLLING,
 		.pio_mask = 0x1f,
@@ -446,7 +446,7 @@
 		.port_ops = &via_port_ops
 	};
 	/* VIA UDMA 66 devices */
-	static struct ata_port_info via_udma66_info = {
+	static const struct ata_port_info via_udma66_info = {
 		.sht = &via_sht,
 		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SETXFER_POLLING,
 		.pio_mask = 0x1f,
@@ -455,7 +455,7 @@
 		.port_ops = &via_port_ops
 	};
 	/* VIA UDMA 100 devices */
-	static struct ata_port_info via_udma100_info = {
+	static const struct ata_port_info via_udma100_info = {
 		.sht = &via_sht,
 		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SETXFER_POLLING,
 		.pio_mask = 0x1f,
@@ -464,7 +464,7 @@
 		.port_ops = &via_port_ops
 	};
 	/* UDMA133 with bad AST (All current 133) */
-	static struct ata_port_info via_udma133_info = {
+	static const struct ata_port_info via_udma133_info = {
 		.sht = &via_sht,
 		.flags = ATA_FLAG_SLAVE_POSS | ATA_FLAG_SETXFER_POLLING,
 		.pio_mask = 0x1f,
@@ -472,7 +472,8 @@
 		.udma_mask = 0x7f,	/* FIXME: should check north bridge */
 		.port_ops = &via_port_ops
 	};
-	struct ata_port_info *port_info[2], *type;
+	struct ata_port_info type;
+	const struct ata_port_info *ppi[] = { &type, NULL };
 	struct pci_dev *isa = NULL;
 	const struct via_isa_bridge *config;
 	static int printed_version;
@@ -517,25 +518,25 @@
 	switch(config->flags & VIA_UDMA) {
 		case VIA_UDMA_NONE:
 			if (config->flags & VIA_NO_UNMASK)
-				type = &via_mwdma_info_borked;
+				type = via_mwdma_info_borked;
 			else
-				type = &via_mwdma_info;
+				type = via_mwdma_info;
 			break;
 		case VIA_UDMA_33:
-			type = &via_udma33_info;
+			type = via_udma33_info;
 			break;
 		case VIA_UDMA_66:
-			type = &via_udma66_info;
+			type = via_udma66_info;
 			/* The 66 MHz devices require we enable the clock */
 			pci_read_config_dword(pdev, 0x50, &timing);
 			timing |= 0x80008;
 			pci_write_config_dword(pdev, 0x50, timing);
 			break;
 		case VIA_UDMA_100:
-			type = &via_udma100_info;
+			type = via_udma100_info;
 			break;
 		case VIA_UDMA_133:
-			type = &via_udma133_info;
+			type = via_udma133_info;
 			break;
 		default:
 			WARN_ON(1);
@@ -550,10 +551,9 @@
 	}
 
 	/* We have established the device type, now fire it up */
-	type->private_data = (void *)config;
+	type.private_data = (void *)config;
 
-	port_info[0] = port_info[1] = type;
-	return ata_pci_init_one(pdev, port_info, 2);
+	return ata_pci_init_one(pdev, ppi);
 }
 
 #ifdef CONFIG_PM
diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c
index 6962f8e..4cea3ef 100644
--- a/drivers/ata/sata_nv.c
+++ b/drivers/ata/sata_nv.c
@@ -457,7 +457,7 @@
 	.host_stop		= nv_adma_host_stop,
 };
 
-static struct ata_port_info nv_port_info[] = {
+static const struct ata_port_info nv_port_info[] = {
 	/* generic */
 	{
 		.sht		= &nv_sht,
@@ -1537,7 +1537,7 @@
 static int nv_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 {
 	static int printed_version = 0;
-	const struct ata_port_info *ppi[2];
+	const struct ata_port_info *ppi[] = { NULL, NULL };
 	struct ata_host *host;
 	struct nv_host_priv *hpriv;
 	int rc;
@@ -1565,8 +1565,8 @@
 		type = ADMA;
 	}
 
-	ppi[0] = ppi[1] = &nv_port_info[type];
-	rc = ata_pci_prepare_native_host(pdev, ppi, 2, &host);
+	ppi[0] = &nv_port_info[type];
+	rc = ata_pci_prepare_native_host(pdev, ppi, &host);
 	if (rc)
 		return rc;
 
diff --git a/drivers/ata/sata_sis.c b/drivers/ata/sata_sis.c
index d8ee062..ee66c5f 100644
--- a/drivers/ata/sata_sis.c
+++ b/drivers/ata/sata_sis.c
@@ -129,7 +129,7 @@
 	.port_start		= ata_port_start,
 };
 
-static struct ata_port_info sis_port_info = {
+static const struct ata_port_info sis_port_info = {
 	.flags		= ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY,
 	.pio_mask	= 0x1f,
 	.mwdma_mask	= 0x7,
@@ -255,7 +255,7 @@
 {
 	static int printed_version;
 	struct ata_port_info pi = sis_port_info;
-	const struct ata_port_info *ppi[2] = { &pi, &pi };
+	const struct ata_port_info *ppi[] = { &pi, NULL };
 	struct ata_host *host;
 	u32 genctl, val;
 	u8 pmr;
@@ -335,7 +335,7 @@
 		break;
 	}
 
-	rc = ata_pci_prepare_native_host(pdev, ppi, 2, &host);
+	rc = ata_pci_prepare_native_host(pdev, ppi, &host);
 	if (rc)
 		return rc;
 
diff --git a/drivers/ata/sata_uli.c b/drivers/ata/sata_uli.c
index f74e383..006f5e3 100644
--- a/drivers/ata/sata_uli.c
+++ b/drivers/ata/sata_uli.c
@@ -125,7 +125,7 @@
 	.port_start		= ata_port_start,
 };
 
-static struct ata_port_info uli_port_info = {
+static const struct ata_port_info uli_port_info = {
 	.flags		= ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY |
 			  ATA_FLAG_IGN_SIMPLEX,
 	.pio_mask       = 0x1f,		/* pio0-4 */
@@ -201,19 +201,33 @@
 	n_ports = 2;
 	if (board_idx == uli_5287)
 		n_ports = 4;
-	rc = ata_pci_prepare_native_host(pdev, ppi, n_ports, &host);
-	if (rc)
-		return rc;
+
+	/* allocate the host */
+	host = ata_host_alloc_pinfo(&pdev->dev, ppi, n_ports);
+	if (!host)
+		return -ENOMEM;
 
 	hpriv = devm_kzalloc(&pdev->dev, sizeof(*hpriv), GFP_KERNEL);
 	if (!hpriv)
 		return -ENOMEM;
 	host->private_data = hpriv;
 
+	/* the first two ports are standard SFF */
+	rc = ata_pci_init_native_host(host);
+	if (rc)
+		return rc;
+
+	rc = ata_pci_init_bmdma(host);
+	if (rc)
+		return rc;
+
 	iomap = host->iomap;
 
 	switch (board_idx) {
 	case uli_5287:
+		/* If there are four, the last two live right after
+		 * the standard SFF ports.
+		 */
 		hpriv->scr_cfg_addr[0] = ULI5287_BASE;
 		hpriv->scr_cfg_addr[1] = ULI5287_BASE + ULI5287_OFFS;
 
diff --git a/drivers/ata/sata_via.c b/drivers/ata/sata_via.c
index 939c924..814597a 100644
--- a/drivers/ata/sata_via.c
+++ b/drivers/ata/sata_via.c
@@ -415,7 +415,7 @@
 	struct ata_host *host;
 	int rc;
 
-	rc = ata_pci_prepare_native_host(pdev, ppi, 2, &host);
+	rc = ata_pci_prepare_native_host(pdev, ppi, &host);
 	if (rc)
 		return rc;
 	*r_host = host;
diff --git a/drivers/ata/sis.h b/drivers/ata/sis.h
index 231da8f..0f2208d 100644
--- a/drivers/ata/sis.h
+++ b/drivers/ata/sis.h
@@ -2,4 +2,4 @@
 struct ata_port_info;
 
 /* pata_sis.c */
-extern struct ata_port_info sis_info133;
+extern const struct ata_port_info sis_info133;
diff --git a/include/linux/libata.h b/include/linux/libata.h
index 8a7cc13..95b74ba 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -253,10 +253,6 @@
 	ATA_DMA_PAD_SZ		= 4,
 	ATA_DMA_PAD_BUF_SZ	= ATA_DMA_PAD_SZ * ATA_MAX_QUEUE,
 
-	/* masks for port functions */
-	ATA_PORT_PRIMARY	= (1 << 0),
-	ATA_PORT_SECONDARY	= (1 << 1),
-
 	/* ering size */
 	ATA_ERING_SIZE		= 32,
 
@@ -688,8 +684,8 @@
 extern void ata_port_disable(struct ata_port *);
 extern void ata_std_ports(struct ata_ioports *ioaddr);
 #ifdef CONFIG_PCI
-extern int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
-			     unsigned int n_ports);
+extern int ata_pci_init_one (struct pci_dev *pdev,
+			     const struct ata_port_info * const * ppi);
 extern void ata_pci_remove_one (struct pci_dev *pdev);
 #ifdef CONFIG_PM
 extern void ata_pci_device_do_suspend(struct pci_dev *pdev, pm_message_t mesg);
@@ -854,11 +850,11 @@
 	unsigned long		val;
 };
 
-extern int ata_pci_init_native_host(struct ata_host *host,
-				    unsigned int port_mask);
+extern int ata_pci_init_native_host(struct ata_host *host);
+extern int ata_pci_init_bmdma(struct ata_host *host);
 extern int ata_pci_prepare_native_host(struct pci_dev *pdev,
 				const struct ata_port_info * const * ppi,
-				int n_ports, struct ata_host **r_host);
+				struct ata_host **r_host);
 extern int pci_test_config_bits(struct pci_dev *pdev, const struct pci_bits *bits);
 extern unsigned long ata_pci_default_filter(struct ata_device *, unsigned long);
 #endif /* CONFIG_PCI */