redonkable/alistair23-linux
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dw_dmac: apply default dma_mask if needed

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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>
This commit is contained in:
Andy Shevchenko 2013-02-14 10:41:09 +02:00 committed by Vinod Koul
parent a20702b8d7
commit 877e86f283
1 changed files with 6 additions and 0 deletions
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6
drivers/dma/dw_dmac.c
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@ -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;