On Tue, Jul 10, 2018 at 06:17:16PM +0100, Robin Murphy wrote: > diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c > index 8be8106270c2..95e185347e34 100644 > --- a/kernel/dma/direct.c > +++ b/kernel/dma/direct.c > @@ -183,7 +183,7 @@ int dma_direct_supported(struct device *dev, u64 mask) > * Various PCI/PCIe bridges have broken support for > 32bit DMA even > * if the device itself might support it. > */ > - if (dev->dma_32bit_limit && mask > DMA_BIT_MASK(32)) > + if (dev->bus_dma_mask && mask > dev->bus_dma_mask) > return 0;
The comment above this check needs an updated (or just be removed). Also we still have a few architectures not using dma-direct. I guess most were doing fine without such limits anyway, but at least arm will probably need an equivalent check. _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
