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path: root/drivers/pci/p2pdma.c
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Diffstat (limited to 'drivers/pci/p2pdma.c')
-rw-r--r--drivers/pci/p2pdma.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/pci/p2pdma.c b/drivers/pci/p2pdma.c
index 742928d0053e..84ba3058eada 100644
--- a/drivers/pci/p2pdma.c
+++ b/drivers/pci/p2pdma.c
@@ -18,6 +18,7 @@
#include <linux/percpu-refcount.h>
#include <linux/random.h>
#include <linux/seq_buf.h>
+#include <linux/iommu.h>
struct pci_p2pdma {
struct percpu_ref devmap_ref;
@@ -284,6 +285,9 @@ static bool root_complex_whitelist(struct pci_dev *dev)
struct pci_dev *root = pci_get_slot(host->bus, PCI_DEVFN(0, 0));
unsigned short vendor, device;
+ if (iommu_present(dev->dev.bus))
+ return false;
+
if (!root)
return false;