ARM: pxa: ssp: use devm_ functions

Use devm_ functions to allocate memory, ioremap, clk_get etc to clean up
the error unwind path.
Signed-off-by: Daniel Mack <zonque@gmail.com>
Acked-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

arch/arm/plat-pxa/ssp.c

@@ -94,19 +94,16 @@ static int pxa_ssp_probe(struct platform_device *pdev)
 	struct resource *res;
 	struct ssp_device *ssp;
 	struct device *dev = &pdev->dev;
-	int ret = 0;
 
-	ssp = kzalloc(sizeof(struct ssp_device), GFP_KERNEL);
+	ssp = devm_kzalloc(dev, sizeof(struct ssp_device), GFP_KERNEL);
 	if (ssp == NULL)
 		return -ENOMEM;
 
 	ssp->pdev = pdev;
 
-	ssp->clk = clk_get(dev, NULL);
-	if (IS_ERR(ssp->clk)) {
-		ret = PTR_ERR(ssp->clk);
-		goto err_free;
-	}
+	ssp->clk = devm_clk_get(dev, NULL);
+	if (IS_ERR(ssp->clk))
+		return PTR_ERR(ssp->clk);
 
 	if (dev->of_node) {
 		struct of_phandle_args dma_spec;
@@ -148,32 +145,28 @@ static int pxa_ssp_probe(struct platform_device *pdev)
 	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 	if (res == NULL) {
 		dev_err(dev, "no memory resource defined\n");
-		ret = -ENODEV;
-		goto err_free_clk;
+		return -ENODEV;
 	}
 
-	res = request_mem_region(res->start, resource_size(res),
+	res = devm_request_mem_region(dev, res->start, resource_size(res),
 				      pdev->name);
 	if (res == NULL) {
 		dev_err(dev, "failed to request memory resource\n");
-		ret = -EBUSY;
-		goto err_free_clk;
+		return -EBUSY;
 	}
 
 	ssp->phys_base = res->start;
 
-	ssp->mmio_base = ioremap(res->start, resource_size(res));
+	ssp->mmio_base = devm_ioremap(dev, res->start, resource_size(res));
 	if (ssp->mmio_base == NULL) {
 		dev_err(dev, "failed to ioremap() registers\n");
-		ret = -ENODEV;
-		goto err_free_mem;
+		return -ENODEV;
 	}
 
 	ssp->irq = platform_get_irq(pdev, 0);
 	if (ssp->irq < 0) {
 		dev_err(dev, "no IRQ resource defined\n");
-		ret = -ENODEV;
-		goto err_free_io;
+		return -ENODEV;
 	}
 
 	if (dev->of_node) {
@@ -198,17 +191,8 @@ static int pxa_ssp_probe(struct platform_device *pdev)
 	mutex_unlock(&ssp_lock);
 
 	platform_set_drvdata(pdev, ssp);
-	return 0;
 
-err_free_io:
-	iounmap(ssp->mmio_base);
-err_free_mem:
-	release_mem_region(res->start, resource_size(res));
-err_free_clk:
-	clk_put(ssp->clk);
-err_free:
-	kfree(ssp);
-	return ret;
+	return 0;
 }
 
 static int pxa_ssp_remove(struct platform_device *pdev)