1 files changed, 8 insertions, 0 deletions

diff --git a/include/asm-generic/pci.h b/include/asm-generic/pci.h
index c36a77d3bf44..515c6e2e3218 100644
--- a/include/asm-generic/pci.h
+++ b/include/asm-generic/pci.h
@@ -52,4 +52,12 @@ static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
 }
 #endif /* HAVE_ARCH_PCI_GET_LEGACY_IDE_IRQ */
 
+/*
+ * By default, assume that no iommu is in use and that the PCI
+ * space is mapped to address physical 0.
+ */
+#ifndef PCI_DMA_BUS_IS_PHYS
+#define PCI_DMA_BUS_IS_PHYS     (1)
 #endif
+
+#endif /* _ASM_GENERIC_PCI_H */