drm/mgag200: Invalidate page tables when pinning a BO

When a BO gets pinned the placement may get changed. If the memory is
mapped into user space and user space has already accessed the mapped
range the page tables are set up but now point to the wrong memory.
Set bo.mdev->dev_mapping in mgag200_bo_create() to make sure that
ttm_bo_unmap_virtual() called from ttm_bo_handle_move_mem() will take
care of this.

v2: Don't call ttm_bo_unmap_virtual() in mgag200_bo_pin(), fix comment.

Signed-off-by: Egbert Eich <eich@suse.com>
Cc: stable@vger.kernel.org
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/mgag200/mgag200_ttm.c b/drivers/gpu/drm/mgag200/mgag200_ttm.c
index 13878d5de063f4b08b97ee2f5735dc2e3e7cb37b..d70e4a92773bfda96079b1406ffffa9a2f65a0e7 100644 (file)
--- a/drivers/gpu/drm/mgag200/mgag200_ttm.c
+++ b/drivers/gpu/drm/mgag200/mgag200_ttm.c
@@ -323,6 +323,7 @@ int mgag200_bo_create(struct drm_device *dev, int size, int align,
 
        mgabo->gem.driver_private = NULL;
        mgabo->bo.bdev = &mdev->ttm.bdev;
+       mgabo->bo.bdev->dev_mapping = dev->dev_mapping;
 
        mgag200_ttm_placement(mgabo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);