drm/ati_pcigart: use memset_io to reset the memory

Also don't setup pci_gart if we aren't going to need it.

Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/ati_pcigart.c b/drivers/gpu/drm/ati_pcigart.c
index 4d86a62..628eae3 100644 (file)
--- a/drivers/gpu/drm/ati_pcigart.c
+++ b/drivers/gpu/drm/ati_pcigart.c
@@ -99,7 +99,7 @@ int drm_ati_pcigart_init(struct drm_device *dev, struct drm_ati_pcigart_info *ga
        struct drm_sg_mem *entry = dev->sg;
        void *address = NULL;
        unsigned long pages;
-       u32 *pci_gart, page_base, gart_idx;
+       u32 *pci_gart = NULL, page_base, gart_idx;
        dma_addr_t bus_address = 0;
        int i, j, ret = 0;
        int max_ati_pages, max_real_pages;
@@ -118,6 +118,7 @@ int drm_ati_pcigart_init(struct drm_device *dev, struct drm_ati_pcigart_info *ga
                        goto done;
                }
 
+               pci_gart = gart_info->table_handle->vaddr;
                address = gart_info->table_handle->vaddr;
                bus_address = gart_info->table_handle->busaddr;
        } else {
@@ -128,7 +129,6 @@ int drm_ati_pcigart_init(struct drm_device *dev, struct drm_ati_pcigart_info *ga
                          (unsigned long)address);
        }
 
-       pci_gart = (u32 *) address;
 
        max_ati_pages = (gart_info->table_size / sizeof(u32));
        max_real_pages = max_ati_pages / (PAGE_SIZE / ATI_PCIGART_PAGE_SIZE);
@@ -138,8 +138,7 @@ int drm_ati_pcigart_init(struct drm_device *dev, struct drm_ati_pcigart_info *ga
        if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) {
                memset(pci_gart, 0, max_ati_pages * sizeof(u32));
        } else {
-               for (gart_idx = 0; gart_idx < max_ati_pages; gart_idx++)
-                       DRM_WRITE32(map, gart_idx * sizeof(u32), 0);
+               memset_io((void __iomem *)map->handle, 0, max_ati_pages * sizeof(u32));
        }
 
        gart_idx = 0;