[PATCH 2/5] drm/debugfs: disallow debugfs access when device isn't registered
Christian König
ckoenig.leichtzumerken at gmail.com
Mon Apr 24 12:30:25 UTC 2023
During device bringup it might be that we can't access the debugfs files.
Return -ENODEV until the registration is completed on access.
Signed-off-by: Christian König <christian.koenig at amd.com>
---
drivers/gpu/drm/drm_debugfs.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/gpu/drm/drm_debugfs.c b/drivers/gpu/drm/drm_debugfs.c
index 54376e2400bb..796cda62ad12 100644
--- a/drivers/gpu/drm/drm_debugfs.c
+++ b/drivers/gpu/drm/drm_debugfs.c
@@ -148,6 +148,9 @@ static int drm_debugfs_open(struct inode *inode, struct file *file)
{
struct drm_info_node *node = inode->i_private;
+ if (!device_is_registered(node->minor->kdev))
+ return -ENODEV;
+
return single_open(file, node->info_ent->show, node);
}
@@ -155,6 +158,10 @@ static int drm_debugfs_entry_open(struct inode *inode, struct file *file)
{
struct drm_debugfs_entry *entry = inode->i_private;
struct drm_debugfs_info *node = &entry->file;
+ struct drm_minor *minor = entry->dev->primary ?: entry->dev->accel;
+
+ if (!device_is_registered(minor->kdev))
+ return -ENODEV;
return single_open(file, node->show, entry);
}
--
2.34.1
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