[PATCH v2 13/14] PCI/P2PDMA: No longer require no-mmu for host bridge whitelist

Logan Gunthorpe
2019-07-30T16:37:09Z

Now that we map the requests correctly we can remove the iommu_present()
restriction.

Signed-off-by: Logan Gunthorpe <logang@deltatee.com>
---
drivers/pci/p2pdma.c | 4 ----
1 file changed, 4 deletions(-)

diff --git a/drivers/pci/p2pdma.c b/drivers/pci/p2pdma.c
index b86a1c0c11a0..2d643b26d080 100644
--- a/drivers/pci/p2pdma.c
+++ b/drivers/pci/p2pdma.c
@@ -18,7 +18,6 @@
#include <linux/percpu-refcount.h>
#include <linux/random.h>
#include <linux/seq_buf.h>
-#include <linux/iommu.h>
#include <linux/xarray.h>

enum pci_p2pdma_map_type {
@@ -328,9 +327,6 @@ static bool host_bridge_whitelist(struct pci_dev *a, struct pci_dev *b)
struct pci_host_bridge *host_a = pci_find_host_bridge(a->bus);
struct pci_host_bridge *host_b = pci_find_host_bridge(b->bus);

- if (iommu_present(a->dev.bus) || iommu_present(b->dev.bus))
- return false;
-
if (host_a == host_b)
return __host_bridge_whitelist(host_a, true);

--
2.20.1