From: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Date: Mon, 18 Jan 2021 21:01:11 +0000 (-0500)
Subject: drm: Unamp the entire device address space on device unplug
X-Git-Tag: v5.12-rc1~132^2~14^2~2
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=b9d4efa8f9a26428d8d9bace9ce0f988ab28431b;p=linux-platform-drivers-x86.git

drm: Unamp the entire device address space on device unplug

Invalidate all BOs CPU mappings once device is removed.

v3: Move the code from TTM into drm_dev_unplug

Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Daniel Vetter <daniel@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/414809/
Signed-off-by: Christian König <christian.koenig@amd.com>
---

diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index d384a5b8119f..20d22e41d7ce 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);