On Thu, Nov 05, 2020 at 08:42:02AM +0100, Christoph Hellwig wrote: > diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h > index 5f8fd7976034e0..661e4a22b3cb81 100644 > +++ b/include/rdma/ib_verbs.h > @@ -3950,6 +3950,8 @@ static inline int ib_req_ncomp_notif(struct ib_cq *cq, > int wc_cnt) > */ > static inline int ib_dma_mapping_error(struct ib_device *dev, u64 dma_addr) > { > + if (!dev->dma_device) > + return 0;
How about: static inline bool ib_uses_virt_dma(struct ib_device *dev) { return IS_ENABLED(CONFIG_INFINIBAND_VIRT_DMA) && !dev->dma_device; } Which is a a little more guidance that driver authors need to set this config symbol. Jason _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu