[libata] ahci: Factor out SATA port init into a separate function

Signed-off-by: Jeff Garzik <jeff@garzik.org>

drivers/ata/ahci.c

@@ -814,20 +814,13 @@ static int ahci_reset_controller(struct ata_host *host)
 	return 0;
 }
 
-static void ahci_init_controller(struct ata_host *host)
+static void ahci_port_init(struct pci_dev *pdev, struct ata_port *ap,
+			   int port_no, void __iomem *mmio,
+			   void __iomem *port_mmio)
 {
-	struct pci_dev *pdev = to_pci_dev(host->dev);
-	void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
-	int i, rc;
-	u32 tmp;
-
-	for (i = 0; i < host->n_ports; i++) {
-		struct ata_port *ap = host->ports[i];
-		void __iomem *port_mmio = ahci_port_base(ap);
 	const char *emsg = NULL;
-
-		if (ata_port_is_dummy(ap))
-			continue;
+	int rc;
+	u32 tmp;
 
 	/* make sure port is not active */
 	rc = ahci_deinit_port(ap, &emsg);
@@ -846,7 +839,24 @@ static void ahci_init_controller(struct ata_host *host)
 	if (tmp)
 		writel(tmp, port_mmio + PORT_IRQ_STAT);
 
-		writel(1 << i, mmio + HOST_IRQ_STAT);
+	writel(1 << port_no, mmio + HOST_IRQ_STAT);
+}
+
+static void ahci_init_controller(struct ata_host *host)
+{
+	struct pci_dev *pdev = to_pci_dev(host->dev);
+	void __iomem *mmio = host->iomap[AHCI_PCI_BAR];
+	int i;
+	u32 tmp;
+
+	for (i = 0; i < host->n_ports; i++) {
+		struct ata_port *ap = host->ports[i];
+		void __iomem *port_mmio = ahci_port_base(ap);
+
+		if (ata_port_is_dummy(ap))
+			continue;
+
+		ahci_port_init(pdev, ap, i, mmio, port_mmio);
 	}
 
 	tmp = readl(mmio + HOST_CTL);