From 58aa6622d32af7d2c08d45085f44c54554a16ed7 Mon Sep 17 00:00:00 2001 From: Thomas Hellstrom Date: Fri, 3 Jan 2014 11:47:23 +0100 Subject: drm/ttm: Correctly set page mapping and -index members Needed for some vm operations; most notably unmap_mapping_range() with even_cows = 0. Signed-off-by: Thomas Hellstrom Reviewed-by: Brian Paul --- drivers/gpu/drm/ttm/ttm_tt.c | 27 +++++++++++++++++++++++---- 1 file changed, 23 insertions(+), 4 deletions(-) (limited to 'drivers/gpu/drm/ttm/ttm_tt.c') diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c index 210d50365162..9af99084b344 100644 --- a/drivers/gpu/drm/ttm/ttm_tt.c +++ b/drivers/gpu/drm/ttm/ttm_tt.c @@ -170,9 +170,8 @@ void ttm_tt_destroy(struct ttm_tt *ttm) ttm_tt_unbind(ttm); } - if (ttm->state == tt_unbound) { - ttm->bdev->driver->ttm_tt_unpopulate(ttm); - } + if (ttm->state == tt_unbound) + ttm_tt_unpopulate(ttm); if (!(ttm->page_flags & TTM_PAGE_FLAG_PERSISTENT_SWAP) && ttm->swap_storage) @@ -362,7 +361,7 @@ int ttm_tt_swapout(struct ttm_tt *ttm, struct file *persistent_swap_storage) page_cache_release(to_page); } - ttm->bdev->driver->ttm_tt_unpopulate(ttm); + ttm_tt_unpopulate(ttm); ttm->swap_storage = swap_storage; ttm->page_flags |= TTM_PAGE_FLAG_SWAPPED; if (persistent_swap_storage) @@ -375,3 +374,23 @@ out_err: return ret; } + +static void ttm_tt_clear_mapping(struct ttm_tt *ttm) +{ + pgoff_t i; + struct page **page = ttm->pages; + + for (i = 0; i < ttm->num_pages; ++i) { + (*page)->mapping = NULL; + (*page++)->index = 0; + } +} + +void ttm_tt_unpopulate(struct ttm_tt *ttm) +{ + if (ttm->state == tt_unpopulated) + return; + + ttm_tt_clear_mapping(ttm); + ttm->bdev->driver->ttm_tt_unpopulate(ttm); +} -- cgit v1.2.3-55-g7522