[PATCH v3 04/12] drm/ttm: Set dma addr to null after freee

[Andrey Grodzovsky]

Fixes oops.

Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky at amd.com>
---
 drivers/gpu/drm/ttm/ttm_page_alloc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/ttm/ttm_page_alloc.c b/drivers/gpu/drm/ttm/ttm_page_alloc.c
index b40a467..b0df328 100644
--- a/drivers/gpu/drm/ttm/ttm_page_alloc.c
+++ b/drivers/gpu/drm/ttm/ttm_page_alloc.c
@@ -1160,6 +1160,8 @@ void ttm_unmap_and_unpopulate_pages(struct device *dev, struct ttm_dma_tt *tt)
 		dma_unmap_page(dev, tt->dma_address[i], num_pages * PAGE_SIZE,
 			       DMA_BIDIRECTIONAL);
 
+		tt->dma_address[i] = 0;
+
 		i += num_pages;
 	}
 	ttm_pool_unpopulate(&tt->ttm);
-- 
2.7.4