On Wed, 6 Nov 2013, Stefano Stabellini wrote: > On Sat, 2 Nov 2013, Grant Likely wrote: > > On Wed, 30 Oct 2013 00:05:22 -0500, Rob Herring <[email protected]> > > wrote: > > > From: Rob Herring <[email protected]> > > > > > > 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 <[email protected]> > > > > I believe this is okay. I haven't done any testing to back up that > > opinion though. > > Tested-by: Stefano Stabellini <[email protected]>
BTW I hope you are planning on sending this upstream soon, because without it I can very easily corrupt my root fs by simply booting the system. > > > 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/[email protected]/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; > > > > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
