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@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);