fec: Use devm_request_and_ioremap()

Using devm_request_and_ioremap() can make the code cleaner and simpler.
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/freescale/fec.c

@@ -1731,16 +1731,10 @@ fec_probe(struct platform_device *pdev)
 	if (!r)
 		return -ENXIO;
 
-	r = request_mem_region(r->start, resource_size(r), pdev->name);
-	if (!r)
-		return -EBUSY;
-
 	/* Init network device */
 	ndev = alloc_etherdev(sizeof(struct fec_enet_private));
-	if (!ndev) {
-		ret = -ENOMEM;
-		goto failed_alloc_etherdev;
-	}
+	if (!ndev)
+		return -ENOMEM;
 
 	SET_NETDEV_DEV(ndev, &pdev->dev);
 
@@ -1752,7 +1746,7 @@ fec_probe(struct platform_device *pdev)
 	    (pdev->id_entry->driver_data & FEC_QUIRK_HAS_GBIT))
 		fep->pause_flag |= FEC_PAUSE_FLAG_AUTONEG;
 
-	fep->hwp = ioremap(r->start, resource_size(r));
+	fep->hwp = devm_request_and_ioremap(&pdev->dev, r);
 	fep->pdev = pdev;
 	fep->dev_id = dev_id++;
 
@@ -1874,11 +1868,8 @@ fec_probe(struct platform_device *pdev)
 		clk_disable_unprepare(fep->clk_ptp);
 failed_pin:
 failed_clk:
-	iounmap(fep->hwp);
 failed_ioremap:
 	free_netdev(ndev);
-failed_alloc_etherdev:
-	release_mem_region(r->start, resource_size(r));
 
 	return ret;
 }
@@ -1888,7 +1879,6 @@ fec_drv_remove(struct platform_device *pdev)
 {
 	struct net_device *ndev = platform_get_drvdata(pdev);
 	struct fec_enet_private *fep = netdev_priv(ndev);
-	struct resource *r;
 	int i;
 
 	unregister_netdev(ndev);
@@ -1904,13 +1894,8 @@ fec_drv_remove(struct platform_device *pdev)
 		if (irq > 0)
 			free_irq(irq, ndev);
 	}
-	iounmap(fep->hwp);
 	free_netdev(ndev);
 
-	r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	BUG_ON(!r);
-	release_mem_region(r->start, resource_size(r));
-
 	platform_set_drvdata(pdev, NULL);
 
 	return 0;