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
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