[Intel-gfx] [PATCH 07/23] drm: Make the fb refcount handover less magic

[Daniel Vetter]

On Thu, Mar 22, 2018 at 05:22:57PM +0200, Ville Syrjala wrote:
> From: Ville Syrjälä <ville.syrjala at linux.intel.com>
> 
> Instead of assigning the plane->fb pointer and clearing the fb pointer
> to hand over the reference, let's just do it by grabbing another
> referece for plane->fb and let fb keep its original one.
> 
> Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>

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

> ---
>  drivers/gpu/drm/drm_plane.c | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c
> index bedceca7dd06..008f9456a5e8 100644
> --- a/drivers/gpu/drm/drm_plane.c
> +++ b/drivers/gpu/drm/drm_plane.c
> @@ -1084,8 +1084,7 @@ int drm_mode_page_flip_ioctl(struct drm_device *dev,
>  		plane->old_fb = NULL;
>  	} else {
>  		plane->fb = fb;
> -		/* Unref only the old framebuffer. */
> -		fb = NULL;
> +		drm_framebuffer_get(fb);
>  	}
>  
>  out:
> -- 
> 2.16.1
> 
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-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch