diff options
Diffstat (limited to 'drivers/pci/p2pdma.c')
| -rw-r--r-- | drivers/pci/p2pdma.c | 4 |
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; |