linux-kernel - Re: [PATCH 10/15] drm/nouveau: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL

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Date:   Fri, 17 Sep 2021 11:42:09 -0400
From:   Sean Paul <sean@...rly.run>
To:     Fernando Ramos <greenfoo@....eu>
Cc:     dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        sean@...rly.run, linux-doc@...r.kernel.org,
        amd-gfx@...ts.freedesktop.org, intel-gfx@...ts.freedesktop.org,
        linux-arm-msm@...r.kernel.org, freedreno@...ts.freedesktop.org,
        nouveau@...ts.freedesktop.org, linux-renesas-soc@...r.kernel.org,
        linux-tegra@...r.kernel.org
Subject: Re: [PATCH 10/15] drm/nouveau: cleanup: drm_modeset_lock_all() -->
 DRM_MODESET_LOCK_ALL_BEGIN()

On Thu, Sep 16, 2021 at 11:15:47PM +0200, Fernando Ramos wrote:
> As requested in Documentation/gpu/todo.rst, replace driver calls to
> drm_modeset_lock_all() with DRM_MODESET_LOCK_ALL_BEGIN() and
> DRM_MODESET_LOCK_ALL_END()
> 
> Signed-off-by: Fernando Ramos <greenfoo@....eu>
> ---
>  drivers/gpu/drm/nouveau/dispnv50/disp.c | 12 ++++++++----
>  1 file changed, 8 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/gpu/drm/nouveau/dispnv50/disp.c b/drivers/gpu/drm/nouveau/dispnv50/disp.c
> index d7b9f7f8c9e3..eb613af4cdd5 100644
> --- a/drivers/gpu/drm/nouveau/dispnv50/disp.c
> +++ b/drivers/gpu/drm/nouveau/dispnv50/disp.c
> @@ -667,15 +667,17 @@ nv50_audio_component_bind(struct device *kdev, struct device *hda_kdev,
>  	struct drm_device *drm_dev = dev_get_drvdata(kdev);
>  	struct nouveau_drm *drm = nouveau_drm(drm_dev);
>  	struct drm_audio_component *acomp = data;
> +	struct drm_modeset_acquire_ctx ctx;
> +	int ret;
>  
>  	if (WARN_ON(!device_link_add(hda_kdev, kdev, DL_FLAG_STATELESS)))
>  		return -ENOMEM;
>  
> -	drm_modeset_lock_all(drm_dev);
> +	DRM_MODESET_LOCK_ALL_BEGIN(drm_dev, ctx, 0, ret);
>  	acomp->ops = &nv50_audio_component_ops;
>  	acomp->dev = kdev;
>  	drm->audio.component = acomp;
> -	drm_modeset_unlock_all(drm_dev);
> +	DRM_MODESET_LOCK_ALL_END(drm_dev, ctx, ret);
>  	return 0;

Return ret here, with that fixed,

Reviewed-by: Sean Paul <sean@...rly.run>


>  }
>  
> @@ -686,12 +688,14 @@ nv50_audio_component_unbind(struct device *kdev, struct device *hda_kdev,
>  	struct drm_device *drm_dev = dev_get_drvdata(kdev);
>  	struct nouveau_drm *drm = nouveau_drm(drm_dev);
>  	struct drm_audio_component *acomp = data;
> +	struct drm_modeset_acquire_ctx ctx;
> +	int ret;
>  
> -	drm_modeset_lock_all(drm_dev);
> +	DRM_MODESET_LOCK_ALL_BEGIN(drm_dev, ctx, 0, ret);
>  	drm->audio.component = NULL;
>  	acomp->ops = NULL;
>  	acomp->dev = NULL;
> -	drm_modeset_unlock_all(drm_dev);
> +	DRM_MODESET_LOCK_ALL_END(drm_dev, ctx, ret);
>  }
>  
>  static const struct component_ops nv50_audio_component_bind_ops = {
> -- 
> 2.33.0
> 

-- 
Sean Paul, Software Engineer, Google / Chromium OS