[PATCH] drm: Mark IRQ_BUSID ioctl as legacy

[Daniel Vetter]

On Sun, May 16, 2021 at 09:51:35PM +0200, Thomas Zimmermann wrote:
> The functionality is only implemented for legacy drivers. Mark the ioctl
> as legacy and move the code behind CONFIG_DRM_LEGACY. If legacy drivers
> are disabled, the ioctl call now returns -EINVAL instead of -EOPNOTSUPP.

I think that's fine.

Reviewed-by: Daniel Vetter <daniel.vetter at ffwll.ch>

> 
> Signed-off-by: Thomas Zimmermann <tzimmermann at suse.de>
> ---
>  drivers/gpu/drm/drm_internal.h | 8 --------
>  drivers/gpu/drm/drm_ioctl.c    | 3 ++-
>  drivers/gpu/drm/drm_legacy.h   | 8 ++++++++
>  drivers/gpu/drm/drm_pci.c      | 8 ++++----
>  4 files changed, 14 insertions(+), 13 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_internal.h b/drivers/gpu/drm/drm_internal.h
> index 1dcb5797a3bb..17f3548c8ed2 100644
> --- a/drivers/gpu/drm/drm_internal.h
> +++ b/drivers/gpu/drm/drm_internal.h
> @@ -54,18 +54,10 @@ void drm_lastclose(struct drm_device *dev);
>  #ifdef CONFIG_PCI
>  
>  /* drm_pci.c */
> -int drm_legacy_irq_by_busid(struct drm_device *dev, void *data,
> -			    struct drm_file *file_priv);
>  int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master);
>  
>  #else
>  
> -static inline int drm_legacy_irq_by_busid(struct drm_device *dev, void *data,
> -					  struct drm_file *file_priv)
> -{
> -	return -EINVAL;
> -}
> -
>  static inline int drm_pci_set_busid(struct drm_device *dev,
>  				    struct drm_master *master)
>  {
> diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c
> index b0856c139693..53d314103a37 100644
> --- a/drivers/gpu/drm/drm_ioctl.c
> +++ b/drivers/gpu/drm/drm_ioctl.c
> @@ -577,7 +577,8 @@ static const struct drm_ioctl_desc drm_ioctls[] = {
>  	DRM_IOCTL_DEF(DRM_IOCTL_VERSION, drm_version, DRM_RENDER_ALLOW),
>  	DRM_IOCTL_DEF(DRM_IOCTL_GET_UNIQUE, drm_getunique, 0),
>  	DRM_IOCTL_DEF(DRM_IOCTL_GET_MAGIC, drm_getmagic, 0),
> -	DRM_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_legacy_irq_by_busid, DRM_MASTER|DRM_ROOT_ONLY),
> +	DRM_LEGACY_IOCTL_DEF(DRM_IOCTL_IRQ_BUSID, drm_legacy_irq_by_busid,
> +			     DRM_MASTER|DRM_ROOT_ONLY),
>  
>  	DRM_LEGACY_IOCTL_DEF(DRM_IOCTL_GET_MAP, drm_legacy_getmap_ioctl, 0),
>  
> diff --git a/drivers/gpu/drm/drm_legacy.h b/drivers/gpu/drm/drm_legacy.h
> index 7080d2538421..c9206840c87f 100644
> --- a/drivers/gpu/drm/drm_legacy.h
> +++ b/drivers/gpu/drm/drm_legacy.h
> @@ -235,9 +235,17 @@ void drm_master_legacy_init(struct drm_master *master);
>  static inline void drm_master_legacy_init(struct drm_master *master) {}
>  #endif
>  
> +/* drm_pci.c */
>  #if IS_ENABLED(CONFIG_DRM_LEGACY) && IS_ENABLED(CONFIG_PCI)
> +int drm_legacy_irq_by_busid(struct drm_device *dev, void *data, struct drm_file *file_priv);
>  void drm_legacy_pci_agp_destroy(struct drm_device *dev);
>  #else
> +static inline int drm_legacy_irq_by_busid(struct drm_device *dev, void *data,
> +					  struct drm_file *file_priv)
> +{
> +	return -EINVAL;
> +}
> +
>  static inline void drm_legacy_pci_agp_destroy(struct drm_device *dev) {}
>  #endif
>  
> diff --git a/drivers/gpu/drm/drm_pci.c b/drivers/gpu/drm/drm_pci.c
> index f508f70e7a3f..39d35fc3a43b 100644
> --- a/drivers/gpu/drm/drm_pci.c
> +++ b/drivers/gpu/drm/drm_pci.c
> @@ -72,7 +72,9 @@ int drm_pci_set_busid(struct drm_device *dev, struct drm_master *master)
>  	return 0;
>  }
>  
> -static int drm_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *p)
> +#ifdef CONFIG_DRM_LEGACY
> +
> +static int drm_legacy_pci_irq_by_busid(struct drm_device *dev, struct drm_irq_busid *p)
>  {
>  	struct pci_dev *pdev = to_pci_dev(dev->dev);
>  
> @@ -115,11 +117,9 @@ int drm_legacy_irq_by_busid(struct drm_device *dev, void *data,
>  	if (!drm_core_check_feature(dev, DRIVER_HAVE_IRQ))
>  		return -EOPNOTSUPP;
>  
> -	return drm_pci_irq_by_busid(dev, p);
> +	return drm_legacy_pci_irq_by_busid(dev, p);
>  }
>  
> -#ifdef CONFIG_DRM_LEGACY
> -
>  void drm_legacy_pci_agp_destroy(struct drm_device *dev)
>  {
>  	if (dev->agp) {
> -- 
> 2.31.1
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch