Commit 877e86f2 authored Feb 14, 2013 by Andy Shevchenko Committed by Vinod Koul Feb 14, 2013

dw_dmac: apply default dma_mask if needed



In some cases we got the device without dma_mask configured. We have to apply
the default value to avoid crashes during memory mapping.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>

parent a20702b8

drivers/dma/dw_dmac.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -1661,6 +1661,12 @@ static int dw_probe(struct platform_device *pdev)
		if (!regs)
		return -EBUSY;

		/* Apply default dma_mask if needed */
		if (!pdev->dev.dma_mask) {
		pdev->dev.dma_mask = &pdev->dev.coherent_dma_mask;
		pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
		}

		dw_params = dma_read_byaddr(regs, DW_PARAMS);
		autocfg = dw_params >> DW_PARAMS_EN & 0x1;

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