drm: Extract drm_master_relase

Like with drm_master_open protect it with a check for primary_client
to make it clear that this can't happen on render/control nodes.

Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1465930269-7883-7-git-send-email-daniel.vetter@ffwll.ch

diff --git a/drivers/gpu/drm/drm_auth.c b/drivers/gpu/drm/drm_auth.c
index 9c1e208..e015a7e 100644 (file)
--- 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);

diff --git a/drivers/gpu/drm/drm_fops.c b/drivers/gpu/drm/drm_fops.c
index e252267..f3b2677 100644 (file)
--- a/drivers/gpu/drm/drm_fops.c
+++ b/drivers/gpu/drm/drm_fops.c
@@ -411,43 +411,12 @@ int drm_release(struct inode *inode, struct file *filp)
 
        drm_legacy_ctxbitmap_flush(dev, file_priv);
 
-       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);
+       if (drm_is_primary_client(file_priv))
+               drm_master_release(file_priv);
 
        if (dev->driver->postclose)
                dev->driver->postclose(dev, file_priv);
 
-
        if (drm_core_check_feature(dev, DRIVER_PRIME))
                drm_prime_destroy_file_private(&file_priv->prime);
 

diff --git a/drivers/gpu/drm/drm_internal.h b/drivers/gpu/drm/drm_internal.h
index 2b9a94f..38401d4 100644 (file)
--- a/drivers/gpu/drm/drm_internal.h
+++ b/drivers/gpu/drm/drm_internal.h
@@ -67,6 +67,7 @@ int drm_setmaster_ioctl(struct drm_device *dev, void *data,
 int drm_dropmaster_ioctl(struct drm_device *dev, void *data,
                         struct drm_file *file_priv);
 int drm_master_open(struct drm_file *file_priv);
+void drm_master_release(struct drm_file *file_priv);
 
 /* drm_sysfs.c */
 extern struct class *drm_class;