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drm/debugfs: disallow debugfs access when device isn't registered

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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@amd.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230829110115.3442-3-christian.koenig@amd.com
This commit is contained in:
Christian König
2023-08-29 13:01:12 +02:00
committed by Christian König
parent e76e7ec8f1
commit 7a0f217899
1 changed files with 7 additions and 0 deletions
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7
drivers/gpu/drm/drm_debugfs.c
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@@ -150,6 +150,9 @@ 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);
}
@@ -157,6 +160,10 @@ 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);
}