Am 02.03.20 um 23:25 schrieb Daniel Vetter:
> 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.
>
> Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
Acked-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
> ---
> drivers/gpu/drm/drm_drv.c | 7 ++++---
> 1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
> index 7b84ee8a5eb5..1a048325f30e 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;
> *
> @@ -961,6 +960,8 @@ 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);
>
>
--
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer
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