From: Michal Srb Date: Tue, 6 Aug 2013 13:26:50 +0000 (+0200) Subject: drm/cirrus: Invalidate page tables when pinning a BO X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=109a51598869a39fdcec2d49672a9a39b6d89481;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git drm/cirrus: Invalidate page tables when pinning a BO 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 Cc: stable@vger.kernel.org Signed-off-by: Dave Airlie --- diff --git a/drivers/gpu/drm/cirrus/cirrus_ttm.c b/drivers/gpu/drm/cirrus/cirrus_ttm.c index 0047012045c2..69fd8f1ac8df 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);