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Date: Wed, 30 Jan 2013 07:36:21 +0530 From: Viresh Kumar <viresh.kumar@...aro.org> To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com> Cc: Vinod Koul <vinod.koul@...el.com>, linux-kernel@...r.kernel.org, spear-devel <spear-devel@...t.st.com>, Arnd Bergmann <arnd.bergmann@...aro.org> Subject: Re: [PATCH] dw_dmac: apply default dma_mask if needed On 29 January 2013 20:36, Andy Shevchenko <andriy.shevchenko@...ux.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.shevchenko@...ux.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.kumar@...aro.org> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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