powerpc/iommu: Add it_page_shift field to determine iommu page size

This patch adds a it_page_shift field to struct iommu_table and
initiliases it to 4K for all platforms.

Signed-off-by: Alistair Popple <alistair@popple.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 3 insertions, 2 deletions

diff --git a/arch/powerpc/platforms/wsp/wsp_pci.c b/arch/powerpc/platforms/wsp/wsp_pci.c
index 8a589618551e..9a15e5b39bb8 100644
--- a/arch/powerpc/platforms/wsp/wsp_pci.c
+++ b/arch/powerpc/platforms/wsp/wsp_pci.c
@@ -381,8 +381,9 @@ static struct wsp_dma_table *wsp_pci_create_dma32_table(struct wsp_phb *phb,
 
         /* Init bits and pieces */
         tbl->table.it_blocksize = 16;
-        tbl->table.it_offset = addr >> IOMMU_PAGE_SHIFT_4K;
-        tbl->table.it_size = size >> IOMMU_PAGE_SHIFT_4K;
+        tbl->table.it_page_shift = IOMMU_PAGE_SHIFT_4K;
+        tbl->table.it_offset = addr >> tbl->table.it_page_shift;
+        tbl->table.it_size = size >> tbl->table.it_page_shift;
 
         /*
          * It's already blank but we clear it anyway.