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authorThomas Hellstrom <thellstrom@vmware.com>2014-02-05 09:18:26 +0100
committerThomas Hellstrom <thellstrom@vmware.com>2014-02-05 16:03:29 +0100
commit1b76af5ce8deb1c775ad1674bd249d782b5b13d9 (patch)
tree201a27807dde2d1ab37d54c351c319e8fb5e5bc6 /drivers
parentc66f854338253e603a4fb6817069ee23eacf0ae3 (diff)
drm/ttm: Don't clear page metadata of imported sg pages
These page pointers shouldn't be visible to TTM in the first place, but until we fix that up, don't clear the page metadata because that will upset the exporter. Reported-and-tested-by: Cristoph Haag <haagch.christoph@googleemail.com> Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com> Reviewed-by: Jakob Bornecrantz <jakob@vmware.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpu/drm/ttm/ttm_tt.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/ttm/ttm_tt.c b/drivers/gpu/drm/ttm/ttm_tt.c
index 9af99084b344..75f319090043 100644
--- a/drivers/gpu/drm/ttm/ttm_tt.c
+++ b/drivers/gpu/drm/ttm/ttm_tt.c
@@ -380,6 +380,9 @@ static void ttm_tt_clear_mapping(struct ttm_tt *ttm)
pgoff_t i;
struct page **page = ttm->pages;
+ if (ttm->page_flags & TTM_PAGE_FLAG_SG)
+ return;
+
for (i = 0; i < ttm->num_pages; ++i) {
(*page)->mapping = NULL;
(*page++)->index = 0;