On Wed, 30 Oct 2013 00:05:22 -0500, Rob Herring <robherring2@xxxxxxxxx> wrote: > From: Rob Herring <rob.herring@xxxxxxxxxxx> > > Platform devices created by DT code don't initialize dma_mask pointer to > anything. Set it to coherent_dma_mask by default if the architecture > code has not set it. > > Signed-off-by: Rob Herring <rob.herring@xxxxxxxxxxx> I believe this is okay. I haven't done any testing to back up that opinion though. g. > --- > I think this is at least part of what is needed to fix dma_mask issue > raised by Stefano [1]. Things should work AFAICT with just this, but > I suppose the xgmac driver needs to set the mask as well (not relying > on the default), but some pointing the dma_mask to a valid value is > needed first. > > Rob > > [1] http://www.mail-archive.com/linux-kernel@xxxxxxxxxxxxxxx/msg528236.html > > drivers/of/platform.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/drivers/of/platform.c b/drivers/of/platform.c > index f6dcde2..fce088e 100644 > --- a/drivers/of/platform.c > +++ b/drivers/of/platform.c > @@ -215,6 +215,8 @@ static struct platform_device *of_platform_device_create_pdata( > dev->archdata.dma_mask = 0xffffffffUL; > #endif > dev->dev.coherent_dma_mask = DMA_BIT_MASK(32); > + if (!dev->dev.dma_mask) > + dev->dev.dma_mask = &dev->dev.coherent_dma_mask; > dev->dev.bus = &platform_bus_type; > dev->dev.platform_data = platform_data; > > -- > 1.8.1.2 > -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
