[PATCH 13/51] drm/vgem: Use drmm_add_final_kfree

[Sam Ravnborg]

On Thu, Feb 27, 2020 at 07:14:44PM +0100, Daniel Vetter wrote:
> With this we can drop the final kfree from the release function.
> 
> v2: After drm_dev_init/drmm_add_final_kfree we need to clean up
> everything through a drm_dev_put. Rework the unwind code to match
> that.
> 
> Signed-off-by: Daniel Vetter <daniel.vetter at intel.com>
> Cc: Daniel Vetter <daniel.vetter at ffwll.ch>
> Cc: Emil Velikov <emil.velikov at collabora.com>
> Cc: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Sean Paul <seanpaul at chromium.org>
> Cc: Eric Anholt <eric at anholt.net>
> Cc: Rob Clark <robdclark at chromium.org>
> Cc: Sam Ravnborg <sam at ravnborg.org>
> ---

Acked-by: Sam Ravnborg <sam at ravnborg.org>

>  drivers/gpu/drm/vgem/vgem_drv.c | 14 ++++++++------
>  1 file changed, 8 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/drm/vgem/vgem_drv.c b/drivers/gpu/drm/vgem/vgem_drv.c
> index 909eba43664a..7486014e9149 100644
> --- a/drivers/gpu/drm/vgem/vgem_drv.c
> +++ b/drivers/gpu/drm/vgem/vgem_drv.c
> @@ -39,6 +39,7 @@
>  #include <drm/drm_drv.h>
>  #include <drm/drm_file.h>
>  #include <drm/drm_ioctl.h>
> +#include <drm/drm_managed.h>
>  #include <drm/drm_prime.h>
>  
>  #include "vgem_drv.h"
> @@ -432,8 +433,6 @@ static void vgem_release(struct drm_device *dev)
>  
>  	platform_device_unregister(vgem->platform);
>  	drm_dev_fini(&vgem->drm);
> -
> -	kfree(vgem);
>  }
>  
>  static struct drm_driver vgem_driver = {
> @@ -489,16 +488,19 @@ static int __init vgem_init(void)
>  			   &vgem_device->platform->dev);
>  	if (ret)
>  		goto out_unregister;
> +	drmm_add_final_kfree(&vgem_device->drm, vgem_device);
>  
>  	/* Final step: expose the device/driver to userspace */
> -	ret  = drm_dev_register(&vgem_device->drm, 0);
> +	ret = drm_dev_register(&vgem_device->drm, 0);
>  	if (ret)
> -		goto out_fini;
> +		goto out_put;
>  
>  	return 0;
>  
> -out_fini:
> -	drm_dev_fini(&vgem_device->drm);
> +out_put:
> +	drm_dev_put(&vgem_device->drm);
> +	return ret;
> +
>  out_unregister:
>  	platform_device_unregister(vgem_device->platform);
>  out_free:
> -- 
> 2.24.1