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authorEgbert Eich <eich@suse.com>2013-07-17 17:40:56 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-08-14 22:59:09 -0700
commit12fb12f1f103676c2e81bcc392436171349d37db (patch)
treea2986b90844a1f3d0c9e22e37d6f69590f648a2c /drivers/gpu/drm/mgag200
parent18da37c30dfb6bd4e46b39fefe06b891524d80a6 (diff)
downloadlinux-linaro-stable-12fb12f1f103676c2e81bcc392436171349d37db.tar.gz
drm/mgag200: Invalidate page tables when pinning a BO
commit ecaac1c866bcda4780a963b3d18cd310d971aea3 upstream. 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> Signed-off-by: Dave Airlie <airlied@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/gpu/drm/mgag200')
-rw-r--r--drivers/gpu/drm/mgag200/mgag200_ttm.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/gpu/drm/mgag200/mgag200_ttm.c b/drivers/gpu/drm/mgag200/mgag200_ttm.c
index 401c9891d3a8..d2cb32f3c05b 100644
--- a/drivers/gpu/drm/mgag200/mgag200_ttm.c
+++ b/drivers/gpu/drm/mgag200/mgag200_ttm.c
@@ -347,6 +347,7 @@ 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);