diff options
Diffstat (limited to 'drivers/gpu/drm/drm_auth.c')
| -rw-r--r-- | drivers/gpu/drm/drm_auth.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_auth.c b/drivers/gpu/drm/drm_auth.c index 9c1e2081cd58..e015a7edb154 100644 --- a/drivers/gpu/drm/drm_auth.c +++ b/drivers/gpu/drm/drm_auth.c @@ -243,6 +243,43 @@ int drm_master_open(struct drm_file *file_priv) return ret; } +void drm_master_release(struct drm_file *file_priv) +{ + struct drm_device *dev = file_priv->minor->dev; + + mutex_lock(&dev->master_mutex); + if (file_priv->is_master) { + struct drm_master *master = file_priv->master; + + /* + * Since the master is disappearing, so is the + * possibility to lock. + */ + mutex_lock(&dev->struct_mutex); + if (master->lock.hw_lock) { + if (dev->sigdata.lock == master->lock.hw_lock) + dev->sigdata.lock = NULL; + master->lock.hw_lock = NULL; + master->lock.file_priv = NULL; + wake_up_interruptible_all(&master->lock.lock_queue); + } + mutex_unlock(&dev->struct_mutex); + + if (file_priv->minor->master == file_priv->master) { + /* drop the reference held my the minor */ + if (dev->driver->master_drop) + dev->driver->master_drop(dev, file_priv, true); + drm_master_put(&file_priv->minor->master); + } + } + + /* drop the master reference held by the file priv */ + if (file_priv->master) + drm_master_put(&file_priv->master); + file_priv->is_master = 0; + mutex_unlock(&dev->master_mutex); +} + struct drm_master *drm_master_get(struct drm_master *master) { kref_get(&master->refcount); |