Another place gone where modern drivers could have hit
dev->struct_mutex.
To avoid too deeply nesting control flow rework it a bit.
Signed-off-by: Daniel Vetter <daniel.vet...@intel.com>
---
drivers/gpu/drm/drm_auth.c | 20 ++++++++++++--------
1 file changed, 12 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/drm_auth.c b/drivers/gpu/drm/drm_auth.c
index e015a7edb154..a58b2eb0d004 100644
--- a/drivers/gpu/drm/drm_auth.c
+++ b/drivers/gpu/drm/drm_auth.c
@@ -246,11 +246,14 @@ int drm_master_open(struct drm_file *file_priv)
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->master_mutex);
- if (file_priv->is_master) {
- struct drm_master *master = file_priv->master;
+ if (!file_priv->is_master)
+ goto out_unlock;
+ if (!drm_core_check_feature(dev, DRIVER_MODESET)) {
/*
* Since the master is disappearing, so is the
* possibility to lock.
@@ -264,19 +267,20 @@ void drm_master_release(struct drm_file *file_priv)
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);
- }
+ 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;
+out_unlock:
mutex_unlock(&dev->master_mutex);
}
--
2.8.1
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