This is a cirrus version of Egbert Eich's patch for mgag200.
Without bo.bdev->dev_mapping set, the ttm_bo_unmap_virtual_locked
called from ttm_bo_handle_move_mem returns with no effect. If any
application accessed the memory before it was moved, it will
access wrong memory next time. This causes crashes when changing
resolution down.
Signed-off-by: Michal Srb <msrb at suse.com>
---
diff --git a/drivers/gpu/drm/cirrus/cirrus_ttm.c
b/drivers/gpu/drm/cirrus/cirrus_ttm.c
index 0047012..69fd8f1 100644
--- a/drivers/gpu/drm/cirrus/cirrus_ttm.c
+++ b/drivers/gpu/drm/cirrus/cirrus_ttm.c
@@ -328,6 +328,7 @@ int cirrus_bo_create(struct drm_device *dev, int size, int
align,
cirrusbo->gem.driver_private = NULL;
cirrusbo->bo.bdev = &cirrus->ttm.bdev;
+ cirrusbo->bo.bdev->dev_mapping = dev->dev_mapping;
cirrus_ttm_placement(cirrusbo, TTM_PL_FLAG_VRAM | TTM_PL_FLAG_SYSTEM);
