mtd: sh_flctl: use devm_* managed allocators

This simplifies error and cleanup code paths.

Cc: David Woodhouse <dwmw2@infradead.org>
Cc: linux-mtd@lists.infradead.org
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

drivers/mtd/nand/sh_flctl.c

@@ -1094,38 +1094,32 @@ static int flctl_probe(struct platform_device *pdev)
 	struct mtd_info *flctl_mtd;
 	struct nand_chip *nand;
 	struct sh_flctl_platform_data *pdata;
-	int ret = -ENXIO;
+	int ret;
 	int irq;
 	struct mtd_part_parser_data ppdata = {};
 
-	flctl = kzalloc(sizeof(struct sh_flctl), GFP_KERNEL);
+	flctl = devm_kzalloc(&pdev->dev, sizeof(struct sh_flctl), GFP_KERNEL);
 	if (!flctl) {
 		dev_err(&pdev->dev, "failed to allocate driver data\n");
 		return -ENOMEM;
 	}
 
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	if (!res) {
-		dev_err(&pdev->dev, "failed to get I/O memory\n");
-		goto err_iomap;
-	}
-
-	flctl->reg = ioremap(res->start, resource_size(res));
-	if (flctl->reg == NULL) {
-		dev_err(&pdev->dev, "failed to remap I/O memory\n");
-		goto err_iomap;
-	}
+	flctl->reg = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(flctl->reg))
+		return PTR_ERR(flctl->reg);
 
 	irq = platform_get_irq(pdev, 0);
 	if (irq < 0) {
 		dev_err(&pdev->dev, "failed to get flste irq data\n");
-		goto err_flste;
+		return -ENXIO;
 	}
 
-	ret = request_irq(irq, flctl_handle_flste, IRQF_SHARED, "flste", flctl);
+	ret = devm_request_irq(&pdev->dev, irq, flctl_handle_flste, IRQF_SHARED,
+			       "flste", flctl);
 	if (ret) {
 		dev_err(&pdev->dev, "request interrupt failed.\n");
-		goto err_flste;
+		return ret;
 	}
 
 	if (pdev->dev.of_node)
@@ -1135,8 +1129,7 @@ static int flctl_probe(struct platform_device *pdev)
 
 	if (!pdata) {
 		dev_err(&pdev->dev, "no setup data defined\n");
-		ret = -EINVAL;
-		goto err_pdata;
+		return -EINVAL;
 	}
 
 	platform_set_drvdata(pdev, flctl);
@@ -1190,12 +1183,6 @@ static int flctl_probe(struct platform_device *pdev)
 err_chip:
 	flctl_release_dma(flctl);
 	pm_runtime_disable(&pdev->dev);
-err_pdata:
-	free_irq(irq, flctl);
-err_flste:
-	iounmap(flctl->reg);
-err_iomap:
-	kfree(flctl);
 	return ret;
 }
 
@@ -1206,9 +1193,6 @@ static int flctl_remove(struct platform_device *pdev)
 	flctl_release_dma(flctl);
 	nand_release(&flctl->mtd);
 	pm_runtime_disable(&pdev->dev);
-	free_irq(platform_get_irq(pdev, 0), flctl);
-	iounmap(flctl->reg);
-	kfree(flctl);
 
 	return 0;
 }