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DMA-API: dma: dw_dmac.c: convert to use dma_coerce_mask_and_coherent()

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This code sequence:
	if (!pdev->dev.dma_mask) {
		pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
		pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
	}
bypasses the architectures check on the DMA mask.  It can be replaced
with dma_coerce_mask_and_coherent(), avoiding the direct initialization
of this mask.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Russell King 2013-06-27 13:37:21 +01:00
parent 105f4ade6f
commit 24353b8bb4
1 changed files with 3 additions and 5 deletions
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8
drivers/dma/dw/platform.c
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@ -191,11 +191,9 @@ static int dw_probe(struct platform_device *pdev)
if (IS_ERR(chip->regs))
return PTR_ERR(chip->regs);
/* Apply default dma_mask if needed */
if (!dev->dma_mask) {
dev->dma_mask = &dev->coherent_dma_mask;
dev->coherent_dma_mask = DMA_BIT_MASK(32);
}
err = dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
if (err)
return err;
pdata = dev_get_platdata(dev);
if (!pdata)