[PATCH v8 4/8] drm/vkms: Switch to managed for crtc

["José Expósito" <jose.exposito89@gmail.com>]

> The current VKMS driver uses managed function to create crtc, but
> don't use it to properly clean the crtc workqueue. It is not an
> issue yet, but in order to support multiple devices easily,
> convert this code to use drm and device managed helpers.
> 
> Signed-off-by: Louis Chauvet <louis.chauvet@bootlin.com>
> Acked-by: Maxime Ripard <mripard@kernel.org>

Reviewed-by: José Expósito <jose.exposito89@gmail.com>

Thanks!

> ---
>  drivers/gpu/drm/vkms/vkms_crtc.c | 5 ++++-
>  drivers/gpu/drm/vkms/vkms_drv.c  | 9 ---------
>  2 files changed, 4 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/gpu/drm/vkms/vkms_crtc.c b/drivers/gpu/drm/vkms/vkms_crtc.c
> index 28a57ae109fcc05af3fe74f94518c462c09119e3..434c35d5e9477d2961826262591db8ab43838e09 100644
> --- a/drivers/gpu/drm/vkms/vkms_crtc.c
> +++ b/drivers/gpu/drm/vkms/vkms_crtc.c
> @@ -4,6 +4,7 @@
>  
>  #include <drm/drm_atomic.h>
>  #include <drm/drm_atomic_helper.h>
> +#include <drm/drm_managed.h>
>  #include <drm/drm_probe_helper.h>
>  #include <drm/drm_vblank.h>
>  
> @@ -296,7 +297,9 @@ int vkms_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
>  	spin_lock_init(&vkms_out->lock);
>  	spin_lock_init(&vkms_out->composer_lock);
>  
> -	vkms_out->composer_workq = alloc_ordered_workqueue("vkms_composer", 0);
> +	vkms_out->composer_workq = drmm_alloc_ordered_workqueue(dev, "vkms_composer", 0);
> +	if (IS_ERR(vkms_out->composer_workq))
> +		return PTR_ERR(vkms_out->composer_workq);
>  	if (!vkms_out->composer_workq)
>  		return -ENOMEM;
>  
> diff --git a/drivers/gpu/drm/vkms/vkms_drv.c b/drivers/gpu/drm/vkms/vkms_drv.c
> index e0409aba93496932b32a130ebb608ee53b1a9c59..7c142bfc3bd9de9556621db3e7f570dc0a4fab3a 100644
> --- a/drivers/gpu/drm/vkms/vkms_drv.c
> +++ b/drivers/gpu/drm/vkms/vkms_drv.c
> @@ -53,14 +53,6 @@ MODULE_PARM_DESC(enable_overlay, "Enable/Disable overlay support");
>  
>  DEFINE_DRM_GEM_FOPS(vkms_driver_fops);
>  
> -static void vkms_release(struct drm_device *dev)
> -{
> -	struct vkms_device *vkms = drm_device_to_vkms_device(dev);
> -
> -	if (vkms->output.composer_workq)
> -		destroy_workqueue(vkms->output.composer_workq);
> -}
> -
>  static void vkms_atomic_commit_tail(struct drm_atomic_state *old_state)
>  {
>  	struct drm_device *dev = old_state->dev;
> @@ -108,7 +100,6 @@ static const struct drm_debugfs_info vkms_config_debugfs_list[] = {
>  
>  static const struct drm_driver vkms_driver = {
>  	.driver_features	= DRIVER_MODESET | DRIVER_ATOMIC | DRIVER_GEM,
> -	.release		= vkms_release,
>  	.fops			= &vkms_driver_fops,
>  	DRM_GEM_SHMEM_DRIVER_OPS,
>  	DRM_FBDEV_SHMEM_DRIVER_OPS,
>