On Tue, 29 May 2018, Christoph Hellwig wrote: > Print a useful warning instead. > > Reported-by: Finn Thain <[email protected]> > Signed-off-by: Christoph Hellwig <[email protected]>
Tested-by: Finn Thain <[email protected]> Thanks. -- > --- > lib/dma-direct.c | 7 +++++++ > 1 file changed, 7 insertions(+) > > diff --git a/lib/dma-direct.c b/lib/dma-direct.c > index a48f94eff62e..8be8106270c2 100644 > --- a/lib/dma-direct.c > +++ b/lib/dma-direct.c > @@ -34,6 +34,13 @@ check_addr(struct device *dev, dma_addr_t dma_addr, size_t > size, > const char *caller) > { > if (unlikely(dev && !dma_capable(dev, dma_addr, size))) { > + if (!dev->dma_mask) { > + dev_err(dev, > + "%s: call on device without dma_mask\n", > + caller); > + return false; > + } > + > if (*dev->dma_mask >= DMA_BIT_MASK(32)) { > dev_err(dev, > "%s: overflow %pad+%zu of device mask %llx\n", > _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
