mfd: omap-usb-host: Use devm_kzalloc() and devm_request_and_ioremap()

Use devm_ variants of kzalloc and ioremap. Also clean up error path.

Signed-off-by: Roger Quadros <[e-mail]>
Reviewed-by: Felipe Balbi <[e-mail]>

drivers/mfd/omap-usb-host.c

···
 
 	if (!pdata) {
 		dev_err(dev, "Missing platform data\n");
-		ret = -ENOMEM;
-		goto end_probe;
+		return -ENODEV;
 	}
 
-	omap = kzalloc(sizeof(*omap), GFP_KERNEL);
+	omap = devm_kzalloc(dev, sizeof(*omap), GFP_KERNEL);
 	if (!omap) {
 		dev_err(dev, "Memory allocation failed\n");
-		ret = -ENOMEM;
-		goto end_probe;
+		return -ENOMEM;
+	}
+
+	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "uhh");
+	omap->uhh_base = devm_request_and_ioremap(dev, res);
+	if (!omap->uhh_base) {
+		dev_err(dev, "Resource request/ioremap failed\n");
+		return -EADDRNOTAVAIL;
 	}
 
 	spin_lock_init(&omap->lock);
···
 				"failed error:%d\n", ret);
 	}
 
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "uhh");
-	if (!res) {
-		dev_err(dev, "UHH EHCI get resource failed\n");
-		ret = -ENODEV;
-		goto err_init_60m_fclk;
-	}
-
-	omap->uhh_base = ioremap(res->start, resource_size(res));
-	if (!omap->uhh_base) {
-		dev_err(dev, "UHH ioremap failed\n");
-		ret = -ENOMEM;
-		goto err_init_60m_fclk;
-	}
-
 	platform_set_drvdata(pdev, omap);
 
 	omap_usbhs_init(dev);
···
 		goto err_alloc;
 	}
 
-	goto end_probe;
+	return 0;
 
 err_alloc:
 	omap_usbhs_deinit(&pdev->dev);
-	iounmap(omap->uhh_base);
-
-err_init_60m_fclk:
 	clk_put(omap->init_60m_fclk);
 
 err_usbhost_p2_fck:
···
 err_end:
 	clk_put(omap->ehci_logic_fck);
 	pm_runtime_disable(dev);
-	kfree(omap);
 
-end_probe:
 	return ret;
 }
 
···
 	struct usbhs_hcd_omap *omap = platform_get_drvdata(pdev);
 
 	omap_usbhs_deinit(&pdev->dev);
-	iounmap(omap->uhh_base);
 	clk_put(omap->init_60m_fclk);
 	clk_put(omap->usbhost_p2_fck);
 	clk_put(omap->usbhost_p1_fck);
···
 	clk_put(omap->utmi_p1_fck);
 	clk_put(omap->ehci_logic_fck);
 	pm_runtime_disable(&pdev->dev);
-	kfree(omap);
 
 	return 0;
 }