[v4,02/14] drm: Unamp the entire device address space on device unplug

Commit Message

Andrey Grodzovsky Jan. 18, 2021, 9:01 p.m. UTC

Invalidate all BOs CPU mappings once device is removed.

v3: Move the code from TTM into drm_dev_unplug

Signed-off-by: Andrey Grodzovsky <[e-mail]>
Reviewed-by: Christian König <[e-mail]>
Reviewed-by: Daniel Vetter <[e-mail]>
---
 drivers/gpu/drm/drm_drv.c | 3 +++
 1 file changed, 3 insertions(+)

Patch

diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index d384a5b..20d22e4 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -469,6 +469,9 @@  void drm_dev_unplug(struct drm_device *dev)
 	synchronize_srcu(&drm_unplug_srcu);
 
 	drm_dev_unregister(dev);
+
+	/* Clear all CPU mappings pointing to this device */
+	unmap_mapping_range(dev->anon_inode->i_mapping, 0, 0, 1);
 }
 EXPORT_SYMBOL(drm_dev_unplug);