1 files changed, 6 insertions, 2 deletions

diff --git a/arch/ia64/sn/pci/pcibr/pcibr_dma.c b/arch/ia64/sn/pci/pcibr/pcibr_dma.c
index 1ee977fb6ebb..95af40cb22f2 100644
--- a/arch/ia64/sn/pci/pcibr/pcibr_dma.c
+++ b/arch/ia64/sn/pci/pcibr/pcibr_dma.c
@@ -96,10 +96,14 @@ pcibr_dmamap_ate32(struct pcidev_info *info,
         }
 
         /*
-         * If we're mapping for MSI, set the MSI bit in the ATE
+         * If we're mapping for MSI, set the MSI bit in the ATE.  If it's a
+         * TIOCP based pci bus, we also need to set the PIO bit in the ATE.
          */
-        if (dma_flags & SN_DMA_MSI)
+        if (dma_flags & SN_DMA_MSI) {
                 ate |= PCI32_ATE_MSI;
+                if (IS_TIOCP_SOFT(pcibus_info))
+                        ate |= PCI32_ATE_PIO;
+        }
 
         ate_write(pcibus_info, ate_index, ate_count, ate);