powerpc/powernv: Move pnv_ioda_setup_bus_dma under CONFIG_IOMMU_API

pnv_ioda_setup_bus_dma() is only used when a passed through PE is
returned to the host. If the kernel is built without IOMMU support
this is dead code. Move it under the #ifdef with the rest of the
IOMMU API support.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
Reviewed-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200705133557.443607-2-oohall@gmail.com

diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
index c2d46d2..31c3e6d 100644 (file)
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -1885,19 +1885,6 @@ static bool pnv_pci_ioda_iommu_bypass_supported(struct pci_dev *pdev,
        return false;
 }
 
-static void pnv_ioda_setup_bus_dma(struct pnv_ioda_pe *pe, struct pci_bus *bus)
-{
-       struct pci_dev *dev;
-
-       list_for_each_entry(dev, &bus->devices, bus_list) {
-               set_iommu_table_base(&dev->dev, pe->table_group.tables[0]);
-               dev->dev.archdata.dma_offset = pe->tce_bypass_base;
-
-               if ((pe->flags & PNV_IODA_PE_BUS_ALL) && dev->subordinate)
-                       pnv_ioda_setup_bus_dma(pe, dev->subordinate);
-       }
-}
-
 static inline __be64 __iomem *pnv_ioda_get_inval_reg(struct pnv_phb *phb,
                                                     bool real_mode)
 {
@@ -2547,6 +2534,19 @@ static long pnv_pci_ioda2_create_table_userspace(
        return ret;
 }
 
+static void pnv_ioda_setup_bus_dma(struct pnv_ioda_pe *pe, struct pci_bus *bus)
+{
+       struct pci_dev *dev;
+
+       list_for_each_entry(dev, &bus->devices, bus_list) {
+               set_iommu_table_base(&dev->dev, pe->table_group.tables[0]);
+               dev->dev.archdata.dma_offset = pe->tce_bypass_base;
+
+               if ((pe->flags & PNV_IODA_PE_BUS_ALL) && dev->subordinate)
+                       pnv_ioda_setup_bus_dma(pe, dev->subordinate);
+       }
+}
+
 static void pnv_ioda2_take_ownership(struct iommu_table_group *table_group)
 {
        struct pnv_ioda_pe *pe = container_of(table_group, struct pnv_ioda_pe,