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drm: Only do the hw.lock cleanup in master_relase for !MODESET

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Another place gone where modern drivers could have hit
dev->struct_mutex.

To avoid too deeply nesting control flow rework it a bit.

v2: Review from Chris:
- remove spurious newline.
- fix file_priv->master like for the !file_priv->is_master case.

Cc: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1466148814-8194-2-git-send-email-daniel.vetter@ffwll.ch
This commit is contained in:
Daniel Vetter 2016-06-17 09:33:19 +02:00
parent e4245ea898
commit 0de4cc99c6
1 changed files with 11 additions and 9 deletions
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12
drivers/gpu/drm/drm_auth.c
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@ -246,11 +246,13 @@ 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;
mutex_lock(&dev->master_mutex);
if (file_priv->is_master) {
struct drm_master *master = file_priv->master;
mutex_lock(&dev->master_mutex);
if (!file_priv->is_master)
goto out;
if (!drm_core_check_feature(dev, DRIVER_MODESET)) {
/*
* Since the master is disappearing, so is the
* possibility to lock.
@ -264,6 +266,7 @@ 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 */
@ -271,8 +274,7 @@ void drm_master_release(struct drm_file *file_priv)
dev->driver->master_drop(dev, file_priv, true);
drm_master_put(&file_priv->minor->master);
}
}
out:
/* drop the master reference held by the file priv */
if (file_priv->master)
drm_master_put(&file_priv->master);