A few things: - Update the example driver in the documentation. - We can drop the old kfree in drm_dev_release. - Add a WARN_ON check in drm_dev_register to make sure everyone calls drmm_add_final_kfree and there's no leaks.
v2: Restore the full cleanup, I accidentally left some moved code behind when fixing the bisectability of the series.
Cc: Sam Ravnborg sam@ravnborg.org Cc: Dan Carpenter dan.carpenter@oracle.com Signed-off-by: Daniel Vetter daniel.vetter@intel.com --- drivers/gpu/drm/drm_drv.c | 12 +++++------- 1 file changed, 5 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c index 80cfd0f14475..1ee606b4a4f9 100644 --- a/drivers/gpu/drm/drm_drv.c +++ b/drivers/gpu/drm/drm_drv.c @@ -297,8 +297,6 @@ void drm_minor_release(struct drm_minor *minor) * * drm_mode_config_cleanup(drm); * drm_dev_fini(drm); - * kfree(priv->userspace_facing); - * kfree(priv); * } * * static struct drm_driver driver_drm_driver = { @@ -326,10 +324,11 @@ void drm_minor_release(struct drm_minor *minor) * kfree(drm); * return ret; * } + * drmm_add_final_kfree(drm, priv); * * drm_mode_config_init(drm); * - * priv->userspace_facing = kzalloc(..., GFP_KERNEL); + * priv->userspace_facing = drmm_kzalloc(..., GFP_KERNEL); * if (!priv->userspace_facing) * return -ENOMEM; * @@ -838,10 +837,7 @@ static void drm_dev_release(struct kref *ref)
drm_managed_release(dev);
- if (!dev->driver->release && !dev->managed.final_kfree) { - WARN_ON(!list_empty(&dev->managed.resources)); - kfree(dev); - } else if (dev->managed.final_kfree) + if (dev->managed.final_kfree) kfree(dev->managed.final_kfree); }
@@ -959,6 +955,8 @@ int drm_dev_register(struct drm_device *dev, unsigned long flags) struct drm_driver *driver = dev->driver; int ret;
+ WARN_ON(!dev->managed.final_kfree); + if (drm_dev_needs_global_mutex(dev)) mutex_lock(&drm_global_mutex);