It's related, and soon authmagic will also use the master_mutex.
There is an ever-so-slightly semantic change here: - authmagic will only be cleaned up for primary_client drm_minors. But it's impossible to create authmagic on render/control nodes, so this is fine. - The cleanup is moved down a bit in the release processing. Doesn't matter at all since authmagic is purely internal logic used by the core ioctl access checks, and when we're in a file's release callback no one can do ioctls any more.
v2: Rebased.
Cc: Chris Wilson chris@chris-wilson.co.uk Reviewed-by: Chris Wilson chris@chris-wilson.co.uk (v1) Signed-off-by: Daniel Vetter daniel.vetter@intel.com --- drivers/gpu/drm/drm_auth.c | 5 +++++ drivers/gpu/drm/drm_fops.c | 5 ----- 2 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/gpu/drm/drm_auth.c b/drivers/gpu/drm/drm_auth.c index 54ad64a6d052..24f0f2dc1cce 100644 --- a/drivers/gpu/drm/drm_auth.c +++ b/drivers/gpu/drm/drm_auth.c @@ -248,6 +248,11 @@ void drm_master_release(struct drm_file *file_priv) struct drm_device *dev = file_priv->minor->dev; struct drm_master *master = file_priv->master;
+ mutex_lock(&dev->struct_mutex); + if (file_priv->magic) + idr_remove(&file_priv->master->magic_map, file_priv->magic); + mutex_unlock(&dev->struct_mutex); + mutex_lock(&dev->master_mutex); if (!file_priv->is_master) goto out; diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c index f3b2677de882..f6dfdfcd018b 100644 --- a/drivers/gpu/drm/drm_fops.c +++ b/drivers/gpu/drm/drm_fops.c @@ -376,11 +376,6 @@ int drm_release(struct inode *inode, struct file *filp) list_del(&file_priv->lhead); mutex_unlock(&dev->filelist_mutex);
- mutex_lock(&dev->struct_mutex); - if (file_priv->magic) - idr_remove(&file_priv->master->magic_map, file_priv->magic); - mutex_unlock(&dev->struct_mutex); - if (dev->driver->preclose) dev->driver->preclose(dev, file_priv);