dma: cppi41: Switch to using managed resource in probe

This change uses managed resource APIs to allocate resources such as,
mem, irq in order to simplify the driver unload or failure cases

Signed-off-by: Kiran Padwal <kiran.padwal@smartplayin.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

drivers/dma/cppi41.c

@@ -938,7 +938,7 @@ static int cppi41_dma_probe(struct platform_device *pdev)
 	if (!glue_info)
 		return -EINVAL;
 
-	cdd = kzalloc(sizeof(*cdd), GFP_KERNEL);
+	cdd = devm_kzalloc(&pdev->dev, sizeof(*cdd), GFP_KERNEL);
 	if (!cdd)
 		return -ENOMEM;
 
@@ -959,10 +959,8 @@ static int cppi41_dma_probe(struct platform_device *pdev)
 	cdd->qmgr_mem = of_iomap(dev->of_node, 3);
 
 	if (!cdd->usbss_mem || !cdd->ctrl_mem || !cdd->sched_mem ||
-			!cdd->qmgr_mem) {
-		ret = -ENXIO;
-		goto err_remap;
-	}
+			!cdd->qmgr_mem)
+		return -ENXIO;
 
 	pm_runtime_enable(dev);
 	ret = pm_runtime_get_sync(dev);
@@ -989,7 +987,7 @@ static int cppi41_dma_probe(struct platform_device *pdev)
 
 	cppi_writel(USBSS_IRQ_PD_COMP, cdd->usbss_mem + USBSS_IRQ_ENABLER);
 
-	ret = request_irq(irq, glue_info->isr, IRQF_SHARED,
+	ret = devm_request_irq(&pdev->dev, irq, glue_info->isr, IRQF_SHARED,
 			dev_name(dev), cdd);
 	if (ret)
 		goto err_irq;
@@ -1009,7 +1007,6 @@ static int cppi41_dma_probe(struct platform_device *pdev)
 err_of:
 	dma_async_device_unregister(&cdd->ddev);
 err_dma_reg:
-	free_irq(irq, cdd);
 err_irq:
 	cppi_writel(0, cdd->usbss_mem + USBSS_IRQ_CLEARR);
 	cleanup_chans(cdd);
@@ -1023,8 +1020,6 @@ err_get_sync:
 	iounmap(cdd->ctrl_mem);
 	iounmap(cdd->sched_mem);
 	iounmap(cdd->qmgr_mem);
-err_remap:
-	kfree(cdd);
 	return ret;
 }
 
@@ -1036,7 +1031,7 @@ static int cppi41_dma_remove(struct platform_device *pdev)
 	dma_async_device_unregister(&cdd->ddev);
 
 	cppi_writel(0, cdd->usbss_mem + USBSS_IRQ_CLEARR);
-	free_irq(cdd->irq, cdd);
+	devm_free_irq(&pdev->dev, cdd->irq, cdd);
 	cleanup_chans(cdd);
 	deinit_cppi41(&pdev->dev, cdd);
 	iounmap(cdd->usbss_mem);
@@ -1045,7 +1040,6 @@ static int cppi41_dma_remove(struct platform_device *pdev)
 	iounmap(cdd->qmgr_mem);
 	pm_runtime_put(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
-	kfree(cdd);
 	return 0;
 }