42 files changed, 308 insertions, 306 deletions

diff --git a/drivers/ata/ata_generic.c b/drivers/ata/ata_generic.c
index 0f19e3223358..c3d753296bc6 100644
--- a/drivers/ata/ata_generic.c
+++ b/drivers/ata/ata_generic.c
@@ -141,7 +141,7 @@ static int all_generic_ide;		/* Set to claim all devices */
 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 @@ static int ata_generic_init_one(struct pci_dev *dev, const struct pci_device_id
                 .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 @@ static int ata_generic_init_one(struct pci_dev *dev, const struct pci_device_id
         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 4f5a0dc7fb9c..13b6b1df2ac4 100644
--- a/drivers/ata/ata_piix.c
+++ b/drivers/ata/ata_piix.c
@@ -1030,7 +1030,7 @@ static int piix_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
         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 @@ static int piix_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
                 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 bf8f65b09591..9cff5c506573 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -6856,6 +6856,7 @@ EXPORT_SYMBOL_GPL(ata_timing_merge);
 #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 d211db6b35a2..e35d13466c69 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -544,7 +544,7 @@ static int ata_resources_present(struct pci_dev *pdev, int port)
  *      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 @@ static int ata_pci_init_bmdma(struct ata_host *host)
         }
         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 @@ static int ata_pci_init_bmdma(struct ata_host *host)
 /**
  *      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 @@ int ata_pci_init_native_host(struct ata_host *host, unsigned int port_mask)
                 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 @@ int ata_pci_init_native_host(struct ata_host *host, unsigned int port_mask)
 /**
  *      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_init_native_host(struct ata_host *host, unsigned int port_mask)
  */
 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 @@ int ata_pci_prepare_native_host(struct pci_dev *pdev,
                 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 @@ static int ata_init_legacy_port(struct ata_port *ap,
         /* 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 @@ static int ata_init_legacy_port(struct ata_port *ap,
 /**
  *      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 @@ static int ata_init_legacy_host(struct ata_host *host,
         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)++;
-        }
-
-        if (!legacy_dr->mask)
-                return -EBUSY;
-
-        for (i = 0; i < 2; i++)
-                if (!(legacy_dr->mask & (1 << i)))
+                else {
+                        if (rc == -EBUSY)
+                                (*was_busy)++;
                         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 @@ static int ata_request_legacy_irqs(struct ata_host *host,
         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 @@ static int ata_request_legacy_irqs(struct ata_host *host,
 /**
  *      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
@@ -944,26 +947,34 @@ static int ata_request_legacy_irqs(struct ata_host *host,
  *      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");
 
-        if (!devres_open_group(dev, NULL, GFP_KERNEL))
-                return -ENOMEM;
+        /* 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;
+                }
+        }
 
-        BUG_ON(n_ports < 1 || n_ports > 2);
+        if (!pi) {
+                dev_printk(KERN_ERR, &pdev->dev,
+                           "no valid port_info specified\n");
+                return -EINVAL;
+        }
 
-        port[0] = port_info[0];
-        port[1] = (n_ports > 1) ? port_info[1] : NULL;
+        if (!devres_open_group(dev, NULL, GFP_KERNEL))
+                return -ENOMEM;
 
         /* 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
@@ -984,7 +995,7 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
                 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 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
         }
 
         /* 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 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
         }
 
         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 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
                 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 @@ int ata_pci_init_one (struct pci_dev *pdev, struct ata_port_info **port_info,
                 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 48c7531ae690..3c55a5ff74c7 100644
--- a/drivers/ata/pata_ali.c
+++ b/drivers/ata/pata_ali.c
@@ -518,14 +518,14 @@ static void ali_init_chipset(struct pci_dev *pdev)
 
 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 @@ static int ali_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
                 .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 @@ static int ali_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
                 .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 @@ static int ali_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
                 .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 @@ static int ali_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
                 .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 @@ static int ali_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
                 .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 @@ static int ali_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
                 .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 @@ static int ali_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
          */
 
         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 @@ static int ali_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
                 /* 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 86a26186739c..b439351f1fd3 100644
--- a/drivers/ata/pata_amd.c
+++ b/drivers/ata/pata_amd.c
@@ -538,7 +538,7 @@ static struct ata_port_operations nv133_port_ops = {
 
 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 @@ static int amd_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
                         .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 @@ static int amd_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
                 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 ef51940c3adb..9861059dd673 100644
--- a/drivers/ata/pata_artop.c
+++ b/drivers/ata/pata_artop.c
@@ -414,7 +414,7 @@ static const struct ata_port_operations artop6260_ops = {
 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 @@ static int artop_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
                 .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 @@ static int artop_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
                 .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 @@ static int artop_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
                 .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 @@ static int artop_init_one (struct pci_dev *pdev, const struct pci_device_id *id)
 
         }
 
-        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 3c2264dbdd67..844914681a2a 100644
--- a/drivers/ata/pata_atiixp.c
+++ b/drivers/ata/pata_atiixp.c
@@ -268,7 +268,7 @@ static struct ata_port_operations atiixp_port_ops = {
 
 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 @@ static int atiixp_init_one(struct pci_dev *dev, const struct pci_device_id *id)
                 .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 987dec935b5c..ed00fa9d53be 100644
--- a/drivers/ata/pata_cmd640.c
+++ b/drivers/ata/pata_cmd640.c
@@ -249,17 +249,16 @@ static void cmd640_hardware_init(struct pci_dev *pdev)
 
 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 3e02c6a3ba9c..2a79b335cfcc 100644
--- a/drivers/ata/pata_cmd64x.c
+++ b/drivers/ata/pata_cmd64x.c
@@ -377,7 +377,7 @@ static int cmd64x_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
 {
         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 @@ static int cmd64x_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
                         .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 @@ static int cmd64x_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
         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 @@ static int cmd64x_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
         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 637d8b302e3e..1b67923d7a4e 100644
--- a/drivers/ata/pata_cs5530.c
+++ b/drivers/ata/pata_cs5530.c
@@ -335,7 +335,7 @@ fail_put:
 
 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 @@ static int cs5530_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
                 .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 683885a47b6d..f37d4cd812a1 100644
--- a/drivers/ata/pata_cs5535.c
+++ b/drivers/ata/pata_cs5535.c
@@ -223,7 +223,7 @@ static struct ata_port_operations cs5535_port_ops = {
 
 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 @@ static int cs5535_init_one(struct pci_dev *dev, const struct pci_device_id *id)
                 .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 @@ static int cs5535_init_one(struct pci_dev *dev, const struct pci_device_id *id)
         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 30e5c543bcb0..27b9f29c01e3 100644
--- a/drivers/ata/pata_cypress.c
+++ b/drivers/ata/pata_cypress.c
@@ -165,14 +165,14 @@ static struct ata_port_operations cy82c693_port_ops = {
 
 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 @@ static int cy82c693_init_one(struct pci_dev *pdev, const struct pci_device_id *i
         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 23e929f0cd3f..079248a9b460 100644
--- a/drivers/ata/pata_efar.c
+++ b/drivers/ata/pata_efar.c
@@ -301,7 +301,7 @@ static const struct ata_port_operations efar_ops = {
 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 @@ static int efar_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
                 .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 cb965f41d093..c6c8a8bb06d0 100644
--- a/drivers/ata/pata_hpt366.c
+++ b/drivers/ata/pata_hpt366.c
@@ -417,7 +417,7 @@ static void hpt36x_init_chipset(struct pci_dev *dev)
 
 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 @@ static int hpt36x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
                 .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 @@ static int hpt36x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
         /* 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 1614e8c822a4..5a0a410654e2 100644
--- a/drivers/ata/pata_hpt37x.c
+++ b/drivers/ata/pata_hpt37x.c
@@ -887,7 +887,7 @@ static int hpt37x_calibrate_dpll(struct pci_dev *dev)
 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 @@ static int hpt37x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
                 .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 @@ static int hpt37x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
                 .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 @@ static int hpt37x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
                 .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 @@ static int hpt37x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
                 .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 @@ static int hpt37x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
                 .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 @@ static int hpt37x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
                 .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 int hpt37x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
         };
 
         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 @@ static int hpt37x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
                         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 @@ static int hpt37x_init_one(struct pci_dev *dev, const struct pci_device_id *id)
                 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 ea1037d67860..f25154aed75d 100644
--- a/drivers/ata/pata_hpt3x2n.c
+++ b/drivers/ata/pata_hpt3x2n.c
@@ -488,7 +488,7 @@ static int hpt3x2n_pci_clock(struct pci_dev *pdev)
 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 @@ static int hpt3x2n_init_one(struct pci_dev *dev, const struct pci_device_id *id)
                 .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 @@ static int hpt3x2n_init_one(struct pci_dev *dev, const struct pci_device_id *id)
 
         /* 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 @@ static int hpt3x2n_init_one(struct pci_dev *dev, const struct pci_device_id *id)
         }
 
         /* 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 84c636b9beac..bbabe7902fbb 100644
--- a/drivers/ata/pata_hpt3x3.c
+++ b/drivers/ata/pata_hpt3x3.c
@@ -171,7 +171,7 @@ static void hpt3x3_init_chipset(struct pci_dev *dev)
 
 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 @@ static int hpt3x3_init_one(struct pci_dev *dev, const struct pci_device_id *id)
                 .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 bf3aaa205edc..a769952646e1 100644
--- a/drivers/ata/pata_it8213.c
+++ b/drivers/ata/pata_it8213.c
@@ -311,7 +311,7 @@ static const struct ata_port_operations it8213_ops = {
 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 @@ static int it8213_init_one (struct pci_dev *pdev, const struct pci_device_id *en
                 .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 8e565a5f2c8d..ff9a6fd36657 100644
--- a/drivers/ata/pata_it821x.c
+++ b/drivers/ata/pata_it821x.c
@@ -718,14 +718,14 @@ static int it821x_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
 {
         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 @@ static int it821x_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
                 .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 @@ static int it821x_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
 
         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 1aa7bc2fda54..8d799e87f752 100644
--- a/drivers/ata/pata_jmicron.c
+++ b/drivers/ata/pata_jmicron.c
@@ -191,7 +191,7 @@ static const struct ata_port_operations jmicron_ops = {
 
 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 @@ static int jmicron_init_one (struct pci_dev *pdev, const struct pci_device_id *i
 
                 .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 2745e23cac43..edbfe0dbbf78 100644
--- a/drivers/ata/pata_marvell.c
+++ b/drivers/ata/pata_marvell.c
@@ -161,7 +161,7 @@ static const struct ata_port_operations marvell_ops = {
 
 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 @@ static int marvell_init_one (struct pci_dev *pdev, const struct pci_device_id *i
 
                 .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 @@ static int marvell_init_one (struct pci_dev *pdev, const struct pci_device_id *i
 
                 .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 f15eb34fb1fc..81f563458666 100644
--- a/drivers/ata/pata_netcell.c
+++ b/drivers/ata/pata_netcell.c
@@ -92,7 +92,7 @@ static const struct ata_port_operations netcell_ops = {
 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 @@ static int netcell_init_one (struct pci_dev *pdev, const struct pci_device_id *e
                 .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 @@ static int netcell_init_one (struct pci_dev *pdev, const struct pci_device_id *e
         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 d5eb42bdae9a..ea70ec744879 100644
--- a/drivers/ata/pata_ns87410.c
+++ b/drivers/ata/pata_ns87410.c
@@ -191,14 +191,14 @@ static struct ata_port_operations ns87410_port_ops = {
 
 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 d59002e7528d..29c23ddd6550 100644
--- a/drivers/ata/pata_oldpiix.c
+++ b/drivers/ata/pata_oldpiix.c
@@ -289,20 +289,20 @@ static const struct ata_port_operations oldpiix_pata_ops = {
 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 944b7084b459..1c44653e1e06 100644
--- a/drivers/ata/pata_opti.c
+++ b/drivers/ata/pata_opti.c
@@ -216,19 +216,19 @@ static struct ata_port_operations opti_port_ops = {
 
 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 875ac4a49dd7..3093b02286ce 100644
--- a/drivers/ata/pata_optidma.c
+++ b/drivers/ata/pata_optidma.c
@@ -482,14 +482,14 @@ done_nomsg:		/* Wrong chip revision */
 
 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 @@ static int optidma_init_one(struct pci_dev *dev, const struct pci_device_id *id)
                 .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 @@ static int optidma_init_one(struct pci_dev *dev, const struct pci_device_id *id)
         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 3e204c329d51..edbaf9d653b8 100644
--- a/drivers/ata/pata_pdc202xx_old.c
+++ b/drivers/ata/pata_pdc202xx_old.c
@@ -317,7 +317,7 @@ static struct ata_port_operations pdc2026x_port_ops = {
 
 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 int pdc202xx_init_one(struct pci_dev *dev, const struct pci_device_id *id
                 }
 
         };
-        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 @@ static int pdc202xx_init_one(struct pci_dev *dev, const struct pci_device_id *id
                                 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 bc01b17a00c2..ba96b54f5b87 100644
--- a/drivers/ata/pata_radisys.c
+++ b/drivers/ata/pata_radisys.c
@@ -255,7 +255,7 @@ static const struct ata_port_operations radisys_pata_ops = {
 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 @@ static int radisys_init_one (struct pci_dev *pdev, const struct pci_device_id *e
                 .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 97785b4f1efa..2bfd7ef42af5 100644
--- a/drivers/ata/pata_rz1000.c
+++ b/drivers/ata/pata_rz1000.c
@@ -131,22 +131,20 @@ static int rz1000_fifo_disable(struct pci_dev *pdev)
 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 2af9f8c8bd1f..225013ecf4b6 100644
--- a/drivers/ata/pata_sc1200.c
+++ b/drivers/ata/pata_sc1200.c
@@ -243,7 +243,7 @@ static struct ata_port_operations sc1200_port_ops = {
 
 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 @@ static int sc1200_init_one(struct pci_dev *dev, const struct pci_device_id *id)
                 .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 8bbe4266f760..dee6e211949d 100644
--- a/drivers/ata/pata_serverworks.c
+++ b/drivers/ata/pata_serverworks.c
@@ -475,8 +475,7 @@ static void serverworks_fixup_ht1000(struct pci_dev *pdev)
 
 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 @@ static int serverworks_init_one(struct pci_dev *pdev, const struct pci_device_id
                         .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 @@ static int serverworks_init_one(struct pci_dev *pdev, const struct pci_device_id
         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 @@ static int serverworks_init_one(struct pci_dev *pdev, const struct pci_device_id
                  /* 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 @@ static int serverworks_init_one(struct pci_dev *pdev, const struct pci_device_id
         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 8c0b25f145ae..440e2cb6ee75 100644
--- a/drivers/ata/pata_sil680.c
+++ b/drivers/ata/pata_sil680.c
@@ -341,7 +341,7 @@ static u8 sil680_init_chip(struct pci_dev *pdev)
 
 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 @@ static int sil680_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
                 .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 @@ static int sil680_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
                 .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 @@ static int sil680_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
         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 9b3774a4775a..f2231267e011 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 @@ static const struct ata_port_operations sis_old_ops = {
         .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 @@ static struct ata_port_info sis_info = {
         .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 @@ static struct ata_port_info sis_info33 = {
         .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 void sis_fixup(struct pci_dev *pdev, struct sis_chipset *sis)
 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 @@ static int sis_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
         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 9aeffdbe2829..f48491ad5f3a 100644
--- a/drivers/ata/pata_sl82c105.c
+++ b/drivers/ata/pata_sl82c105.c
@@ -301,20 +301,22 @@ static int sl82c105_bridge_revision(struct pci_dev *pdev)
 
 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 @@ static int sl82c105_init_one(struct pci_dev *dev, const struct pci_device_id *id
                 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 045f9d2832df..b1d3076dfe51 100644
--- a/drivers/ata/pata_triflex.c
+++ b/drivers/ata/pata_triflex.c
@@ -233,20 +233,20 @@ static struct ata_port_operations triflex_port_ops = {
 
 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 3740644e7f43..e4c71f76bd55 100644
--- a/drivers/ata/pata_via.c
+++ b/drivers/ata/pata_via.c
@@ -421,7 +421,7 @@ static void via_config_fifo(struct pci_dev *pdev, unsigned int flags)
 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 @@ static int via_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
                 .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 @@ static int via_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
                 .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 @@ static int via_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
                 .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 @@ static int via_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
                 .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 @@ static int via_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
                 .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 @@ static int via_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
                 .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 @@ static int via_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
         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 @@ static int via_init_one(struct pci_dev *pdev, const struct pci_device_id *id)
         }
 
         /* 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 6962f8e492f5..4cea3ef75226 100644
--- a/drivers/ata/sata_nv.c
+++ b/drivers/ata/sata_nv.c
@@ -457,7 +457,7 @@ static const struct ata_port_operations nv_adma_ops = {
         .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 void nv_adma_error_handler(struct ata_port *ap)
 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 @@ static int nv_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
                 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 d8ee062e82fc..ee66c5fa7ac8 100644
--- a/drivers/ata/sata_sis.c
+++ b/drivers/ata/sata_sis.c
@@ -129,7 +129,7 @@ static const struct ata_port_operations sis_ops = {
         .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 sis_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 {
         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 @@ static int sis_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
                 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 f74e383de083..006f5e352658 100644
--- a/drivers/ata/sata_uli.c
+++ b/drivers/ata/sata_uli.c
@@ -125,7 +125,7 @@ static const struct ata_port_operations uli_ops = {
         .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 @@ static int uli_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
         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 939c9246fdd1..814597a0a708 100644
--- a/drivers/ata/sata_via.c
+++ b/drivers/ata/sata_via.c
@@ -415,7 +415,7 @@ static int vt6420_prepare_host(struct pci_dev *pdev, struct ata_host **r_host)
         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 231da8fc2200..0f2208d8d5ef 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;