diff --git a/drivers/ata/libata-core.c b/drivers/ata/libata-core.c
index 257fda90e527..681693534f4f 100644
--- a/drivers/ata/libata-core.c
+++ b/drivers/ata/libata-core.c
@@ -6925,9 +6925,9 @@ 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_sff_host);
 EXPORT_SYMBOL_GPL(ata_pci_init_bmdma);
-EXPORT_SYMBOL_GPL(ata_pci_prepare_native_host);
+EXPORT_SYMBOL_GPL(ata_pci_prepare_sff_host);
 EXPORT_SYMBOL_GPL(ata_pci_init_one);
 EXPORT_SYMBOL_GPL(ata_pci_remove_one);
 #ifdef CONFIG_PM
diff --git a/drivers/ata/libata-sff.c b/drivers/ata/libata-sff.c
index fa1c22c7b38f..ca7d2245d684 100644
--- a/drivers/ata/libata-sff.c
+++ b/drivers/ata/libata-sff.c
@@ -604,13 +604,17 @@ int ata_pci_init_bmdma(struct ata_host *host)
 }
 
 /**
- *	ata_pci_init_native_host - acquire native ATA resources and init host
+ *	ata_pci_init_sff_host - acquire native PCI ATA resources and init host
  *	@host: target ATA host
  *
  *	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.
  *
+ *	Note that native PCI resources are valid even for legacy hosts
+ *	as we fix up pdev resources array early in boot, so this
+ *	function can be used for both native and legacy SFF hosts.
+ *
  *	LOCKING:
  *	Inherited from calling layer (may sleep).
  *
@@ -618,7 +622,7 @@ int ata_pci_init_bmdma(struct ata_host *host)
  *	0 if at least one port is initialized, -ENODEV if no port is
  *	available.
  */
-int ata_pci_init_native_host(struct ata_host *host)
+int ata_pci_init_sff_host(struct ata_host *host)
 {
 	struct device *gdev = host->dev;
 	struct pci_dev *pdev = to_pci_dev(gdev);
@@ -673,7 +677,7 @@ int ata_pci_init_native_host(struct ata_host *host)
 }
 
 /**
- *	ata_pci_prepare_native_host - helper to prepare native PCI ATA host
+ *	ata_pci_prepare_sff_host - helper to prepare native PCI ATA host
  *	@pdev: target PCI device
  *	@ppi: array of port_info, must be enough for two ports
  *	@r_host: out argument for the initialized ATA host
@@ -687,9 +691,9 @@ int ata_pci_init_native_host(struct ata_host *host)
  *	RETURNS:
  *	0 on success, -errno otherwise.
  */
-int ata_pci_prepare_native_host(struct pci_dev *pdev,
-				const struct ata_port_info * const * ppi,
-				struct ata_host **r_host)
+int ata_pci_prepare_sff_host(struct pci_dev *pdev,
+			     const struct ata_port_info * const * ppi,
+			     struct ata_host **r_host)
 {
 	struct ata_host *host;
 	int rc;
@@ -705,7 +709,7 @@ int ata_pci_prepare_native_host(struct pci_dev *pdev,
 		goto err_out;
 	}
 
-	rc = ata_pci_init_native_host(host);
+	rc = ata_pci_init_sff_host(host);
 	if (rc)
 		goto err_out;
 
@@ -730,221 +734,6 @@ int ata_pci_prepare_native_host(struct pci_dev *pdev,
 	return rc;
 }
 
-struct ata_legacy_devres {
-	unsigned int	mask;
-	unsigned long	cmd_port[2];
-	void __iomem *	cmd_addr[2];
-	void __iomem *	ctl_addr[2];
-	unsigned int	irq[2];
-	void *		irq_dev_id[2];
-};
-
-static void ata_legacy_free_irqs(struct ata_legacy_devres *legacy_dr)
-{
-	int i;
-
-	for (i = 0; i < 2; i++) {
-		if (!legacy_dr->irq[i])
-			continue;
-
-		free_irq(legacy_dr->irq[i], legacy_dr->irq_dev_id[i]);
-		legacy_dr->irq[i] = 0;
-		legacy_dr->irq_dev_id[i] = NULL;
-	}
-}
-
-static void ata_legacy_release(struct device *gdev, void *res)
-{
-	struct ata_legacy_devres *this = res;
-	int i;
-
-	ata_legacy_free_irqs(this);
-
-	for (i = 0; i < 2; i++) {
-		if (this->cmd_addr[i])
-			ioport_unmap(this->cmd_addr[i]);
-		if (this->ctl_addr[i])
-			ioport_unmap(this->ctl_addr[i]);
-		if (this->cmd_port[i])
-			release_region(this->cmd_port[i], 8);
-	}
-}
-
-static int ata_init_legacy_port(struct ata_port *ap,
-				struct ata_legacy_devres *legacy_dr)
-{
-	struct ata_host *host = ap->host;
-	int port_no = ap->port_no;
-	unsigned long cmd_port, ctl_port;
-
-	if (port_no == 0) {
-		cmd_port = ATA_PRIMARY_CMD;
-		ctl_port = ATA_PRIMARY_CTL;
-	} else {
-		cmd_port = ATA_SECONDARY_CMD;
-		ctl_port = ATA_SECONDARY_CTL;
-	}
-
-	/* request cmd_port */
-	if (request_region(cmd_port, 8, "libata"))
-		legacy_dr->cmd_port[port_no] = cmd_port;
-	else {
-		dev_printk(KERN_WARNING, host->dev,
-			   "0x%0lX IDE port busy\n", cmd_port);
-		return -EBUSY;
-	}
-
-	/* 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]) {
-		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];
-	ap->ioaddr.altstatus_addr = legacy_dr->ctl_addr[port_no];
-	ap->ioaddr.ctl_addr = legacy_dr->ctl_addr[port_no];
-	ata_std_ports(&ap->ioaddr);
-
-	return 0;
-}
-
-/**
- *	ata_init_legacy_host - acquire legacy ATA resources and init ATA host
- *	@host: target ATA host
- *	@was_busy: out parameter, indicates whether any port was busy
- *
- *	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 if at least one port is initialized, -ENODEV if no port is
- *	available.
- */
-static int ata_init_legacy_host(struct ata_host *host, int *was_busy)
-{
-	struct device *gdev = host->dev;
-	struct ata_legacy_devres *legacy_dr;
-	int i, rc;
-
-	if (!devres_open_group(gdev, NULL, GFP_KERNEL))
-		return -ENOMEM;
-
-	rc = -ENOMEM;
-	legacy_dr = devres_alloc(ata_legacy_release, sizeof(*legacy_dr),
-				 GFP_KERNEL);
-	if (!legacy_dr)
-		goto err_out;
-	devres_add(gdev, legacy_dr);
-
-	for (i = 0; i < 2; 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)++;
-			host->ports[i]->ops = &ata_dummy_port_ops;
-		}
-	}
-
-	if (!legacy_dr->mask) {
-		dev_printk(KERN_ERR, gdev, "no available legacy port\n");
-		return -ENODEV;
-	}
-
-	devres_remove_group(gdev, NULL);
-	return 0;
-
- err_out:
-	devres_release_group(gdev, NULL);
-	return rc;
-}
-
-/**
- *	ata_request_legacy_irqs - request legacy ATA IRQs
- *	@host: target ATA host
- *	@handler: array of IRQ handlers
- *	@irq_flags: array of IRQ flags
- *	@dev_id: array of IRQ dev_ids
- *
- *	Request legacy IRQs for non-dummy legacy ports in @host.  All
- *	IRQ parameters are passed as array to allow ports to have
- *	separate IRQ handlers.
- *
- *	LOCKING:
- *	Inherited from calling layer (may sleep).
- *
- *	RETURNS:
- *	0 on success, -errno otherwise.
- */
-static int ata_request_legacy_irqs(struct ata_host *host,
-				   irq_handler_t const *handler,
-				   const unsigned int *irq_flags,
-				   void * const *dev_id)
-{
-	struct device *gdev = host->dev;
-	struct ata_legacy_devres *legacy_dr;
-	int i, rc;
-
-	legacy_dr = devres_find(host->dev, ata_legacy_release, NULL, NULL);
-	BUG_ON(!legacy_dr);
-
-	for (i = 0; i < 2; i++) {
-		unsigned int irq;
-
-		/* FIXME: ATA_*_IRQ() should take generic device not pci_dev */
-		if (i == 0)
-			irq = ATA_PRIMARY_IRQ(to_pci_dev(gdev));
-		else
-			irq = ATA_SECONDARY_IRQ(to_pci_dev(gdev));
-
-		if (!(legacy_dr->mask & (1 << i)))
-			continue;
-
-		if (!handler[i]) {
-			dev_printk(KERN_ERR, gdev,
-				   "NULL handler specified for port %d\n", i);
-			rc = -EINVAL;
-			goto err_out;
-		}
-
-		rc = request_irq(irq, handler[i], irq_flags[i], DRV_NAME,
-				 dev_id[i]);
-		if (rc) {
-			dev_printk(KERN_ERR, gdev,
-				"irq %u request failed (errno=%d)\n", irq, rc);
-			goto err_out;
-		}
-
-		/* record irq allocation in legacy_dr */
-		legacy_dr->irq[i] = irq;
-		legacy_dr->irq_dev_id[i] = dev_id[i];
-
-		/* only used to print info */
-		if (i == 0)
-			host->irq = irq;
-		else
-			host->irq2 = irq;
-	}
-
-	return 0;
-
- err_out:
-	ata_legacy_free_irqs(legacy_dr);
-	return rc;
-}
-
 /**
  *	ata_pci_init_one - Initialize/register PCI IDE host controller
  *	@pdev: Controller to be initialized
@@ -1029,35 +818,11 @@ int ata_pci_init_one(struct pci_dev *pdev,
 #endif
 	}
 
-	/* alloc and init host */
-	host = ata_host_alloc_pinfo(dev, ppi, 2);
-	if (!host) {
-		dev_printk(KERN_ERR, &pdev->dev,
-			   "failed to allocate ATA host\n");
-		rc = -ENOMEM;
+	/* prepare host */
+	rc = ata_pci_prepare_sff_host(pdev, ppi, &host);
+	if (rc)
 		goto err_out;
-	}
 
-	if (!legacy_mode) {
-		rc = ata_pci_init_native_host(host);
-		if (rc)
-			goto err_out;
-	} else {
-		int was_busy = 0;
-
-		rc = ata_init_legacy_host(host, &was_busy);
-		if (was_busy)
-			pcim_pin_device(pdev);
-		if (rc)
-			goto err_out;
-
-		/* request respective PCI regions, may fail */
-		rc = pci_request_region(pdev, 1, DRV_NAME);
-		rc = pci_request_region(pdev, 3, DRV_NAME);
-	}
-
-	/* init BMDMA, may fail */
-	ata_pci_init_bmdma(host);
 	pci_set_master(pdev);
 
 	/* start host and request IRQ */
@@ -1068,17 +833,28 @@ int ata_pci_init_one(struct pci_dev *pdev,
 	if (!legacy_mode) {
 		rc = devm_request_irq(dev, pdev->irq, pi->port_ops->irq_handler,
 				      IRQF_SHARED, DRV_NAME, host);
+		if (rc)
+			goto err_out;
 		host->irq = pdev->irq;
 	} else {
-		irq_handler_t handler[2] = { host->ops->irq_handler,
-					     host->ops->irq_handler };
-		unsigned int irq_flags[2] = { IRQF_SHARED, IRQF_SHARED };
-		void *dev_id[2] = { host, host };
+		if (!ata_port_is_dummy(host->ports[0])) {
+			host->irq = ATA_PRIMARY_IRQ(pdev);
+			rc = devm_request_irq(dev, host->irq,
+					      pi->port_ops->irq_handler,
+					      IRQF_SHARED, DRV_NAME, host);
+			if (rc)
+				goto err_out;
+		}
 
-		rc = ata_request_legacy_irqs(host, handler, irq_flags, dev_id);
+		if (!ata_port_is_dummy(host->ports[1])) {
+			host->irq2 = ATA_SECONDARY_IRQ(pdev);
+			rc = devm_request_irq(dev, host->irq2,
+					      pi->port_ops->irq_handler,
+					      IRQF_SHARED, DRV_NAME, host);
+			if (rc)
+				goto err_out;
+		}
 	}
-	if (rc)
-		goto err_out;
 
 	/* register */
 	rc = ata_host_register(host, pi->sht);
diff --git a/drivers/ata/sata_nv.c b/drivers/ata/sata_nv.c
index b2656867c647..db81e3efa5ec 100644
--- a/drivers/ata/sata_nv.c
+++ b/drivers/ata/sata_nv.c
@@ -1560,7 +1560,7 @@ static int nv_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 	}
 
 	ppi[0] = &nv_port_info[type];
-	rc = ata_pci_prepare_native_host(pdev, ppi, &host);
+	rc = ata_pci_prepare_sff_host(pdev, ppi, &host);
 	if (rc)
 		return rc;
 
diff --git a/drivers/ata/sata_sis.c b/drivers/ata/sata_sis.c
index fd80bcf1b236..33716b00c6b7 100644
--- a/drivers/ata/sata_sis.c
+++ b/drivers/ata/sata_sis.c
@@ -334,7 +334,7 @@ static int sis_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 		break;
 	}
 
-	rc = ata_pci_prepare_native_host(pdev, ppi, &host);
+	rc = ata_pci_prepare_sff_host(pdev, ppi, &host);
 	if (rc)
 		return rc;
 
diff --git a/drivers/ata/sata_uli.c b/drivers/ata/sata_uli.c
index aca71819f6e8..b52f83ab056a 100644
--- a/drivers/ata/sata_uli.c
+++ b/drivers/ata/sata_uli.c
@@ -213,7 +213,7 @@ static int uli_init_one (struct pci_dev *pdev, const struct pci_device_id *ent)
 	host->private_data = hpriv;
 
 	/* the first two ports are standard SFF */
-	rc = ata_pci_init_native_host(host);
+	rc = ata_pci_init_sff_host(host);
 	if (rc)
 		return rc;
 
diff --git a/drivers/ata/sata_via.c b/drivers/ata/sata_via.c
index a4c0832033d8..c4124475f754 100644
--- a/drivers/ata/sata_via.c
+++ b/drivers/ata/sata_via.c
@@ -412,7 +412,7 @@ 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, &host);
+	rc = ata_pci_prepare_sff_host(pdev, ppi, &host);
 	if (rc)
 		return rc;
 	*r_host = host;
diff --git a/include/linux/libata.h b/include/linux/libata.h
index bf98d44c8109..0c8b6578bd59 100644
--- a/include/linux/libata.h
+++ b/include/linux/libata.h
@@ -870,11 +870,11 @@ struct pci_bits {
 	unsigned long		val;
 };
 
-extern int ata_pci_init_native_host(struct ata_host *host);
+extern int ata_pci_init_sff_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,
-				struct ata_host **r_host);
+extern int ata_pci_prepare_sff_host(struct pci_dev *pdev,
+				    const struct ata_port_info * const * ppi,
+				    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 */