diff --git a/drivers/pci/p2pdma.c b/drivers/pci/p2pdma.c
index 7c898542af8d..adb17a4f6939 100644
--- a/drivers/pci/p2pdma.c
+++ b/drivers/pci/p2pdma.c
@@ -262,6 +262,9 @@ int pcim_p2pdma_init(struct pci_dev *pdev)
 	struct pci_p2pdma *p2p;
 	int i, ret;
 
+	if (pdev->non_mappable_bars)
+		return -EOPNOTSUPP;
+
 	p2p = rcu_dereference_protected(pdev->p2pdma, 1);
 	if (p2p)
 		return 0;
@@ -318,7 +321,8 @@ struct p2pdma_provider *pcim_p2pdma_provider(struct pci_dev *pdev, int bar)
 {
 	struct pci_p2pdma *p2p;
 
-	if (!(pci_resource_flags(pdev, bar) & IORESOURCE_MEM))
+	if (!(pci_resource_flags(pdev, bar) & IORESOURCE_MEM) ||
+	    pdev->non_mappable_bars)
 		return NULL;
 
 	p2p = rcu_dereference_protected(pdev->p2pdma, 1);
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 2c4454583c11..1e6802017d6b 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -508,7 +508,7 @@ struct pci_dev {
 	unsigned int	no_command_memory:1;	/* No PCI_COMMAND_MEMORY */
 	unsigned int	rom_bar_overlap:1;	/* ROM BAR disable broken */
 	unsigned int	rom_attr_enabled:1;	/* Display of ROM attribute enabled? */
-	unsigned int	non_mappable_bars:1;	/* BARs can't be mapped to user-space  */
+	unsigned int	non_mappable_bars:1;	/* BARs can't be mapped by CPU or peers */
 	pci_dev_flags_t dev_flags;
 	atomic_t	enable_cnt;	/* pci_enable_device has been called */