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Commit f7ceb362 authored by Linus Walleij's avatar Linus Walleij Committed by Vinod Koul
Browse files

dma: coh901318: use devm allocation 



Allocate memory, region, remap and irq for device state using
devm_* helpers to simplify memory accounting.

Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarVinod Koul <vinod.koul@linux.intel.com>
parent 9102d871

drivers/dma/coh901318.c

+24 −48
Original line number Diff line number Diff line
@@ -1438,34 +1438,32 @@ static int __init coh901318_probe(struct platform_device *pdev) 


	io = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	if (!io)

		goto err_get_resource;

		return -ENODEV;



	/* Map DMA controller registers to virtual memory */

	if (request_mem_region(io->start,

	if (devm_request_mem_region(&pdev->dev,

				    io->start,

				    resource_size(io),

			       pdev->dev.driver->name) == NULL) {

		err = -EBUSY;

		goto err_request_mem;

	}

				    pdev->dev.driver->name) == NULL)

		return -ENOMEM;



	pdata = pdev->dev.platform_data;

	if (!pdata)

		goto err_no_platformdata;

		return -ENODEV;



	base = kmalloc(ALIGN(sizeof(struct coh901318_base), 4) +

	base = devm_kzalloc(&pdev->dev,

			    ALIGN(sizeof(struct coh901318_base), 4) +

			    pdata->max_channels *

			    sizeof(struct coh901318_chan),

			    GFP_KERNEL);

	if (!base)

		goto err_alloc_coh_dma_channels;

		return -ENOMEM;



	base->chans = ((void *)base) + ALIGN(sizeof(struct coh901318_base), 4);



	base->virtbase = ioremap(io->start, resource_size(io));

	if (!base->virtbase) {

		err = -ENOMEM;

		goto err_no_ioremap;

	}

	base->virtbase = devm_ioremap(&pdev->dev, io->start, resource_size(io));

	if (!base->virtbase)

		return -ENOMEM;



	base->dev = &pdev->dev;

	base->platform = pdata;
@@ -1474,25 +1472,20 @@ static int __init coh901318_probe(struct platform_device *pdev) 


	COH901318_DEBUGFS_ASSIGN(debugfs_dma_base, base);



	platform_set_drvdata(pdev, base);



	irq = platform_get_irq(pdev, 0);

	if (irq < 0)

		goto err_no_irq;

		return irq;



	err = request_irq(irq, dma_irq_handler, IRQF_DISABLED,

	err = devm_request_irq(&pdev->dev, irq, dma_irq_handler, IRQF_DISABLED,

			       "coh901318", base);

	if (err) {

		dev_crit(&pdev->dev,

			 "Cannot allocate IRQ for DMA controller!\n");

		goto err_request_irq;

	}

	if (err)

		return err;



	err = coh901318_pool_create(&base->pool, &pdev->dev,

				    sizeof(struct coh901318_lli),

				    32);

	if (err)

		goto err_pool_create;

		return err;



	/* init channels for device transfers */

	coh901318_base_init(&base->dma_slave,  base->platform->chans_slave,
@@ -1538,6 +1531,7 @@ static int __init coh901318_probe(struct platform_device *pdev) 
	if (err)

		goto err_register_memcpy;



	platform_set_drvdata(pdev, base);

	dev_info(&pdev->dev, "Initialized COH901318 DMA on virtual base 0x%08x\n",

		(u32) base->virtbase);
@@ -1547,19 +1541,6 @@ static int __init coh901318_probe(struct platform_device *pdev) 
	dma_async_device_unregister(&base->dma_slave);

 err_register_slave:

	coh901318_pool_destroy(&base->pool);

 err_pool_create:

	free_irq(platform_get_irq(pdev, 0), base);

 err_request_irq:

 err_no_irq:

	iounmap(base->virtbase);

 err_no_ioremap:

	kfree(base);

 err_alloc_coh_dma_channels:

 err_no_platformdata:

	release_mem_region(pdev->resource->start,

			   resource_size(pdev->resource));

 err_request_mem:

 err_get_resource:

	return err;

}
@@ -1570,11 +1551,6 @@ static int __exit coh901318_remove(struct platform_device *pdev) 
	dma_async_device_unregister(&base->dma_memcpy);

	dma_async_device_unregister(&base->dma_slave);

	coh901318_pool_destroy(&base->pool);

	free_irq(platform_get_irq(pdev, 0), base);

	iounmap(base->virtbase);

	kfree(base);

	release_mem_region(pdev->resource->start,

			   resource_size(pdev->resource));

	return 0;

}