On 29 January 2013 20:36, Andy Shevchenko
<andriy.shevche...@linux.intel.com> wrote:
> 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.shevche...@linux.intel.com>
> ---
> drivers/dma/dw_dmac.c | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/drivers/dma/dw_dmac.c b/drivers/dma/dw_dmac.c
> index e8d0679..a572a1e 100644
> --- a/drivers/dma/dw_dmac.c
> +++ b/drivers/dma/dw_dmac.c
> @@ -1673,6 +1673,12 @@ static int dw_probe(struct platform_device *pdev)
> if (IS_ERR(regs))
> return PTR_ERR(regs);
>
> + /* 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;
Acked-by: Viresh Kumar <viresh.ku...@linaro.org>
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