diff --git a/drivers/pci/p2pdma.c b/drivers/pci/p2pdma.c index 742928d0053e..1940a7a0a684 100644 --- a/drivers/pci/p2pdma.c +++ b/drivers/pci/p2pdma.c @@ -468,6 +468,14 @@ int pci_p2pdma_distance_many(struct pci_dev *provider, struct device **clients, return -1; for (i = 0; i < num_clients; i++) { + if (IS_ENABLED(CONFIG_DMA_VIRT_OPS) && + clients[i]->dma_ops == &dma_virt_ops) { + if (verbose) + dev_warn(clients[i], + "cannot be used for peer-to-peer DMA because the driver makes use of dma_virt_ops\n"); + return -1; + } + pci_client = find_parent_pci_dev(clients[i]); if (!pci_client) { if (verbose) @@ -732,7 +740,7 @@ int pci_p2pdma_map_sg(struct device *dev, struct scatterlist *sg, int nents, * p2pdma mappings are not compatible with devices that use * dma_virt_ops. If the upper layers do the right thing * this should never happen because it will be prevented - * by the check in pci_p2pdma_add_client() + * by the check in pci_p2pdma_distance_many() */ if (WARN_ON_ONCE(IS_ENABLED(CONFIG_DMA_VIRT_OPS) && dev->dma_ops == &dma_virt_ops))