瀏覽代碼

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>
Thomas Hellstrom 11 年之前
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1b76af5ce8
共有 1 個文件被更改,包括 3 次插入0 次删除
  1. 3 0
      drivers/gpu/drm/ttm/ttm_tt.c

+ 3 - 0
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;