[PATCH 08/10] PCI/P2PDMA: Remove the DMA_VIRT_OPS hacks

Christoph Hellwig
2020-11-06T18:20:14Z

Now that all users of dma_virt_ops are gone we can remove the workaround
for it in the PCI peer to peer code.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
---
drivers/pci/p2pdma.c | 20 --------------------
1 file changed, 20 deletions(-)

diff --git a/drivers/pci/p2pdma.c b/drivers/pci/p2pdma.c
index de1c331dbed43f..b07018af53876c 100644
--- a/drivers/pci/p2pdma.c
+++ b/drivers/pci/p2pdma.c
@@ -556,15 +556,6 @@ int pci_p2pdma_distance_many(struct pci_dev *provider, struct device **clients,
return -1;

for (i = 0; i < num_clients; i++) {
-#ifdef CONFIG_DMA_VIRT_OPS
- if (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;
- }
-#endif
-
pci_client = find_parent_pci_dev(clients[i]);
if (!pci_client) {
if (verbose)
@@ -837,17 +828,6 @@ static int __pci_p2pdma_map_sg(struct pci_p2pdma_pagemap *p2p_pgmap,
phys_addr_t paddr;
int i;

- /*
- * 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_distance_many()
- */
-#ifdef CONFIG_DMA_VIRT_OPS
- if (WARN_ON_ONCE(dev->dma_ops == &dma_virt_ops))
- return 0;
-#endif
-
for_each_sg(sg, s, nents, i) {
paddr = sg_phys(s);

--
2.28.0