powerpc/powernv: Needn't IO segment map for PHB3

PHB3 doesn't support IO ports and we needn't IO segment map for that.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 7 insertions, 6 deletions

diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
index 829047baa4b2..74a5a5773b1f 100644
--- a/arch/powerpc/platforms/powernv/pci-ioda.c
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -1187,22 +1187,23 @@ void __init pnv_pci_init_ioda_phb(struct device_node *np,
         phb->ioda.io_segsize = phb->ioda.io_size / phb->ioda.total_pe;
         phb->ioda.io_pci_base = 0; /* XXX calculate this ? */
 
-        /* Allocate aux data & arrays
-         *
-         * XXX TODO: Don't allocate io segmap on PHB3
-         */
+        /* Allocate aux data & arrays. We don't have IO ports on PHB3 */
         size = _ALIGN_UP(phb->ioda.total_pe / 8, sizeof(unsigned long));
         m32map_off = size;
         size += phb->ioda.total_pe * sizeof(phb->ioda.m32_segmap[0]);
         iomap_off = size;
-        size += phb->ioda.total_pe * sizeof(phb->ioda.io_segmap[0]);
+        if (phb->type == PNV_PHB_IODA1) {
+                iomap_off = size;
+                size += phb->ioda.total_pe * sizeof(phb->ioda.io_segmap[0]);
+        }
         pemap_off = size;
         size += phb->ioda.total_pe * sizeof(struct pnv_ioda_pe);
         aux = alloc_bootmem(size);
         memset(aux, 0, size);
         phb->ioda.pe_alloc = aux;
         phb->ioda.m32_segmap = aux + m32map_off;
-        phb->ioda.io_segmap = aux + iomap_off;
+        if (phb->type == PNV_PHB_IODA1)
+                phb->ioda.io_segmap = aux + iomap_off;
         phb->ioda.pe_array = aux + pemap_off;
         set_bit(0, phb->ioda.pe_alloc);