This makes it safe to access drm_device->dev after the parent device has
been removed/unplugged.
Signed-off-by: Noralf Trønnes <nor...@tronnes.org>
---
drivers/gpu/drm/drm_drv.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
index 53e8f4e103db..ce65f12db0fe 100644
--- a/drivers/gpu/drm/drm_drv.c
+++ b/drivers/gpu/drm/drm_drv.c
@@ -521,7 +521,7 @@ int drm_dev_init(struct drm_device *dev,
BUG_ON(!parent);
kref_init(&dev->ref);
- dev->dev = parent;
+ dev->dev = get_device(parent);
dev->driver = driver;
/* no per-device feature limits by default */
@@ -591,6 +591,7 @@ int drm_dev_init(struct drm_device *dev,
drm_minor_free(dev, DRM_MINOR_RENDER);
drm_fs_inode_free(dev->anon_inode);
err_free:
+ put_device(dev->dev);
mutex_destroy(&dev->master_mutex);
mutex_destroy(&dev->ctxlist_mutex);
mutex_destroy(&dev->clientlist_mutex);
@@ -626,6 +627,8 @@ void drm_dev_fini(struct drm_device *dev)
drm_minor_free(dev, DRM_MINOR_PRIMARY);
drm_minor_free(dev, DRM_MINOR_RENDER);
+ put_device(dev->dev);
+
mutex_destroy(&dev->master_mutex);
mutex_destroy(&dev->ctxlist_mutex);
mutex_destroy(&dev->clientlist_mutex);
--
2.20.1
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
https://lists.freedesktop.org/mailman/listinfo/dri-devel
