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Date: Thu, 14 Jun 2012 08:43:34 +0530
From: Vinod Koul <vinod.koul@...ux.intel.com>
To: Linus Walleij <linus.walleij@...ricsson.com>
Cc: linux-kernel@...r.kernel.org,
Dan Williams <dan.j.williams@...el.com>,
Linus Walleij <linus.walleij@...aro.org>
Subject: Re: [PATCH] dma: coh901318: use devm allocation
On Tue, 2012-06-12 at 20:19 +0200, Linus Walleij wrote:
> From: Linus Walleij <linus.walleij@...aro.org>
>
> Allocate memory, region, remap and irq for device state using
> devm_* helpers to simplify memory accounting.
>
> Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
Applied, thanks
> ---
> drivers/dma/coh901318.c | 72 ++++++++++++++++-------------------------------
> 1 file changed, 24 insertions(+), 48 deletions(-)
>
> diff --git a/drivers/dma/coh901318.c b/drivers/dma/coh901318.c
> index e67b4e0..aa384e5 100644
> --- a/drivers/dma/coh901318.c
> +++ b/drivers/dma/coh901318.c
> @@ -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,
> - resource_size(io),
> - pdev->dev.driver->name) == NULL) {
> - err = -EBUSY;
> - goto err_request_mem;
> - }
> + if (devm_request_mem_region(&pdev->dev,
> + io->start,
> + resource_size(io),
> + 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) +
> - pdata->max_channels *
> - sizeof(struct coh901318_chan),
> - GFP_KERNEL);
> + 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;
> -
> - err = request_irq(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;
> - }
> + return irq;
> +
> + err = devm_request_irq(&pdev->dev, irq, dma_irq_handler, IRQF_DISABLED,
> + "coh901318", base);
> + 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;
> }
>
> --
> 1.7.9.2
>
> --
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--
~Vinod
--
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