[PATCH 38/39] drm: fix locking in gem debugfs/procfs file

[Daniel Vetter]

The idr is protected with our spinlock, if we don't hold that nothing
prevents the gem objects from disappearing from under us.

Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
---
 drivers/gpu/drm/drm_info.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/gpu/drm/drm_info.c b/drivers/gpu/drm/drm_info.c
index d4b20ce..9f8fc4c 100644
--- a/drivers/gpu/drm/drm_info.c
+++ b/drivers/gpu/drm/drm_info.c
@@ -218,7 +218,11 @@ int drm_gem_name_info(struct seq_file *m, void *data)
 	struct drm_device *dev = node->minor->dev;
 
 	seq_printf(m, "  name     size handles refcount\n");
+
+	spin_lock(&dev->object_name_lock);
 	idr_for_each(&dev->object_name_idr, drm_gem_one_name_info, m);
+	spin_unlock(&dev->object_name_lock);
+
 	return 0;
 }
 
-- 
1.8.3.2