USB: ehci-omap: Use devm_ioremap_resource()

Make use of devm_ioremap_resource() and correct comment.

Signed-off-by: Roger Quadros <rogerq@ti.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/host/ehci-omap.c

@@ -216,23 +216,15 @@ static int ehci_hcd_omap_probe(struct platform_device *pdev)
 
 	res =  platform_get_resource_byname(pdev,
 				IORESOURCE_MEM, "ehci");
-	if (!res) {
-		dev_err(dev, "UHH EHCI get resource failed\n");
-		return -ENODEV;
-	}
-
-	regs = ioremap(res->start, resource_size(res));
-	if (!regs) {
-		dev_err(dev, "UHH EHCI ioremap failed\n");
-		return -ENOMEM;
-	}
+	regs = devm_ioremap_resource(dev, res);
+	if (IS_ERR(regs))
+		return PTR_ERR(regs);
 
 	hcd = usb_create_hcd(&ehci_omap_hc_driver, dev,
 			dev_name(dev));
 	if (!hcd) {
-		dev_err(dev, "failed to create hcd with err %d\n", ret);
-		ret = -ENOMEM;
-		goto err_io;
+		dev_err(dev, "Failed to create HCD\n");
+		return -ENOMEM;
 	}
 
 	hcd->rsrc_start = res->start;
@@ -285,8 +277,6 @@ err_pm_runtime:
 	pm_runtime_put_sync(dev);
 	usb_put_hcd(hcd);
 
-err_io:
-	iounmap(regs);
 	return ret;
 }
 
@@ -306,7 +296,6 @@ static int ehci_hcd_omap_remove(struct platform_device *pdev)
 
 	usb_remove_hcd(hcd);
 	disable_put_regulator(dev->platform_data);
-	iounmap(hcd->regs);
 	usb_put_hcd(hcd);
 
 	pm_runtime_put_sync(dev);