Re: [PATCH 01/12] gpu: host1x: Make host1x_client_unregister() return void

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On 22/03/2023 18:02, Uwe Kleine-König wrote:
> This function returned zero unconditionally. Make it return no value and
> simplify all callers accordingly.
> 
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@xxxxxxxxxxxxxx>
> ---
>  drivers/gpu/drm/tegra/dc.c              | 7 +------
>  drivers/gpu/drm/tegra/dsi.c             | 8 +-------
>  drivers/gpu/drm/tegra/gr2d.c            | 8 +-------
>  drivers/gpu/drm/tegra/gr3d.c            | 8 +-------
>  drivers/gpu/drm/tegra/hdmi.c            | 8 +-------
>  drivers/gpu/drm/tegra/hub.c             | 9 ++-------
>  drivers/gpu/drm/tegra/nvdec.c           | 8 +-------
>  drivers/gpu/drm/tegra/sor.c             | 8 +-------
>  drivers/gpu/drm/tegra/vic.c             | 8 +-------
>  drivers/gpu/host1x/bus.c                | 6 ++----
>  drivers/staging/media/tegra-video/csi.c | 8 +-------
>  drivers/staging/media/tegra-video/vi.c  | 8 +-------
>  include/linux/host1x.h                  | 2 +-
>  13 files changed, 15 insertions(+), 81 deletions(-)

Acked-by: Hans Verkuil <hverkuil-cisco@xxxxxxxxx>

Regards,

	Hans

> 
> diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c
> index a67453cee883..bd108159fc2c 100644
> --- a/drivers/gpu/drm/tegra/dc.c
> +++ b/drivers/gpu/drm/tegra/dc.c
> @@ -3268,12 +3268,7 @@ static int tegra_dc_remove(struct platform_device *pdev)
>  	struct tegra_dc *dc = platform_get_drvdata(pdev);
>  	int err;
>  
> -	err = host1x_client_unregister(&dc->client);
> -	if (err < 0) {
> -		dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
> -			err);
> -		return err;
> -	}
> +	host1x_client_unregister(&dc->client);
>  
>  	err = tegra_dc_rgb_remove(dc);
>  	if (err < 0) {
> diff --git a/drivers/gpu/drm/tegra/dsi.c b/drivers/gpu/drm/tegra/dsi.c
> index de1333dc0d86..c8a02a1024bc 100644
> --- a/drivers/gpu/drm/tegra/dsi.c
> +++ b/drivers/gpu/drm/tegra/dsi.c
> @@ -1662,16 +1662,10 @@ static int tegra_dsi_probe(struct platform_device *pdev)
>  static int tegra_dsi_remove(struct platform_device *pdev)
>  {
>  	struct tegra_dsi *dsi = platform_get_drvdata(pdev);
> -	int err;
>  
>  	pm_runtime_disable(&pdev->dev);
>  
> -	err = host1x_client_unregister(&dsi->client);
> -	if (err < 0) {
> -		dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
> -			err);
> -		return err;
> -	}
> +	host1x_client_unregister(&dsi->client);
>  
>  	tegra_output_remove(&dsi->output);
>  
> diff --git a/drivers/gpu/drm/tegra/gr2d.c b/drivers/gpu/drm/tegra/gr2d.c
> index e3bb4c99ed39..49b8d4953e7f 100644
> --- a/drivers/gpu/drm/tegra/gr2d.c
> +++ b/drivers/gpu/drm/tegra/gr2d.c
> @@ -298,14 +298,8 @@ static int gr2d_probe(struct platform_device *pdev)
>  static int gr2d_remove(struct platform_device *pdev)
>  {
>  	struct gr2d *gr2d = platform_get_drvdata(pdev);
> -	int err;
>  
> -	err = host1x_client_unregister(&gr2d->client.base);
> -	if (err < 0) {
> -		dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
> -			err);
> -		return err;
> -	}
> +	host1x_client_unregister(&gr2d->client.base);
>  
>  	return 0;
>  }
> diff --git a/drivers/gpu/drm/tegra/gr3d.c b/drivers/gpu/drm/tegra/gr3d.c
> index a1fd3113ea96..cd3679d8eef9 100644
> --- a/drivers/gpu/drm/tegra/gr3d.c
> +++ b/drivers/gpu/drm/tegra/gr3d.c
> @@ -553,14 +553,8 @@ static int gr3d_probe(struct platform_device *pdev)
>  static int gr3d_remove(struct platform_device *pdev)
>  {
>  	struct gr3d *gr3d = platform_get_drvdata(pdev);
> -	int err;
>  
> -	err = host1x_client_unregister(&gr3d->client.base);
> -	if (err < 0) {
> -		dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
> -			err);
> -		return err;
> -	}
> +	host1x_client_unregister(&gr3d->client.base);
>  
>  	return 0;
>  }
> diff --git a/drivers/gpu/drm/tegra/hdmi.c b/drivers/gpu/drm/tegra/hdmi.c
> index 40ec3e6cf204..6798eea317df 100644
> --- a/drivers/gpu/drm/tegra/hdmi.c
> +++ b/drivers/gpu/drm/tegra/hdmi.c
> @@ -1877,14 +1877,8 @@ static int tegra_hdmi_probe(struct platform_device *pdev)
>  static int tegra_hdmi_remove(struct platform_device *pdev)
>  {
>  	struct tegra_hdmi *hdmi = platform_get_drvdata(pdev);
> -	int err;
>  
> -	err = host1x_client_unregister(&hdmi->client);
> -	if (err < 0) {
> -		dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
> -			err);
> -		return err;
> -	}
> +	host1x_client_unregister(&hdmi->client);
>  
>  	tegra_output_remove(&hdmi->output);
>  
> diff --git a/drivers/gpu/drm/tegra/hub.c b/drivers/gpu/drm/tegra/hub.c
> index b872527a123c..2c91dc444085 100644
> --- a/drivers/gpu/drm/tegra/hub.c
> +++ b/drivers/gpu/drm/tegra/hub.c
> @@ -1178,13 +1178,8 @@ static int tegra_display_hub_remove(struct platform_device *pdev)
>  {
>  	struct tegra_display_hub *hub = platform_get_drvdata(pdev);
>  	unsigned int i;
> -	int err;
>  
> -	err = host1x_client_unregister(&hub->client);
> -	if (err < 0) {
> -		dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
> -			err);
> -	}
> +	host1x_client_unregister(&hub->client);
>  
>  	for (i = 0; i < hub->soc->num_wgrps; i++) {
>  		struct tegra_windowgroup *wgrp = &hub->wgrps[i];
> @@ -1194,7 +1189,7 @@ static int tegra_display_hub_remove(struct platform_device *pdev)
>  
>  	pm_runtime_disable(&pdev->dev);
>  
> -	return err;
> +	return 0;
>  }
>  
>  static const struct tegra_display_hub_soc tegra186_display_hub = {
> diff --git a/drivers/gpu/drm/tegra/nvdec.c b/drivers/gpu/drm/tegra/nvdec.c
> index 86c5818ac27b..077f3af0d0b6 100644
> --- a/drivers/gpu/drm/tegra/nvdec.c
> +++ b/drivers/gpu/drm/tegra/nvdec.c
> @@ -550,14 +550,8 @@ static int nvdec_probe(struct platform_device *pdev)
>  static int nvdec_remove(struct platform_device *pdev)
>  {
>  	struct nvdec *nvdec = platform_get_drvdata(pdev);
> -	int err;
>  
> -	err = host1x_client_unregister(&nvdec->client.base);
> -	if (err < 0) {
> -		dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
> -			err);
> -		return err;
> -	}
> +	host1x_client_unregister(&nvdec->client.base);
>  
>  	falcon_exit(&nvdec->falcon);
>  
> diff --git a/drivers/gpu/drm/tegra/sor.c b/drivers/gpu/drm/tegra/sor.c
> index 8af632740673..d067b2d01b2e 100644
> --- a/drivers/gpu/drm/tegra/sor.c
> +++ b/drivers/gpu/drm/tegra/sor.c
> @@ -3981,14 +3981,8 @@ static int tegra_sor_probe(struct platform_device *pdev)
>  static int tegra_sor_remove(struct platform_device *pdev)
>  {
>  	struct tegra_sor *sor = platform_get_drvdata(pdev);
> -	int err;
>  
> -	err = host1x_client_unregister(&sor->client);
> -	if (err < 0) {
> -		dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
> -			err);
> -		return err;
> -	}
> +	host1x_client_unregister(&sor->client);
>  
>  	pm_runtime_disable(&pdev->dev);
>  
> diff --git a/drivers/gpu/drm/tegra/vic.c b/drivers/gpu/drm/tegra/vic.c
> index 531a71c72061..fd614756ecf8 100644
> --- a/drivers/gpu/drm/tegra/vic.c
> +++ b/drivers/gpu/drm/tegra/vic.c
> @@ -540,14 +540,8 @@ static int vic_probe(struct platform_device *pdev)
>  static int vic_remove(struct platform_device *pdev)
>  {
>  	struct vic *vic = platform_get_drvdata(pdev);
> -	int err;
>  
> -	err = host1x_client_unregister(&vic->client.base);
> -	if (err < 0) {
> -		dev_err(&pdev->dev, "failed to unregister host1x client: %d\n",
> -			err);
> -		return err;
> -	}
> +	host1x_client_unregister(&vic->client.base);
>  
>  	falcon_exit(&vic->falcon);
>  
> diff --git a/drivers/gpu/host1x/bus.c b/drivers/gpu/host1x/bus.c
> index bc7271a00a94..4d16a3396c4a 100644
> --- a/drivers/gpu/host1x/bus.c
> +++ b/drivers/gpu/host1x/bus.c
> @@ -803,7 +803,7 @@ EXPORT_SYMBOL(__host1x_client_register);
>   * Removes a host1x client from its host1x controller instance. If a logical
>   * device has already been initialized, it will be torn down.
>   */
> -int host1x_client_unregister(struct host1x_client *client)
> +void host1x_client_unregister(struct host1x_client *client)
>  {
>  	struct host1x_client *c;
>  	struct host1x *host1x;
> @@ -815,7 +815,7 @@ int host1x_client_unregister(struct host1x_client *client)
>  		err = host1x_del_client(host1x, client);
>  		if (!err) {
>  			mutex_unlock(&devices_lock);
> -			return 0;
> +			return;
>  		}
>  	}
>  
> @@ -832,8 +832,6 @@ int host1x_client_unregister(struct host1x_client *client)
>  	mutex_unlock(&clients_lock);
>  
>  	host1x_bo_cache_destroy(&client->cache);
> -
> -	return 0;
>  }
>  EXPORT_SYMBOL(host1x_client_unregister);
>  
> diff --git a/drivers/staging/media/tegra-video/csi.c b/drivers/staging/media/tegra-video/csi.c
> index 426e653bd55d..36ca639622c9 100644
> --- a/drivers/staging/media/tegra-video/csi.c
> +++ b/drivers/staging/media/tegra-video/csi.c
> @@ -778,14 +778,8 @@ static int tegra_csi_probe(struct platform_device *pdev)
>  static int tegra_csi_remove(struct platform_device *pdev)
>  {
>  	struct tegra_csi *csi = platform_get_drvdata(pdev);
> -	int err;
>  
> -	err = host1x_client_unregister(&csi->client);
> -	if (err < 0) {
> -		dev_err(&pdev->dev,
> -			"failed to unregister host1x client: %d\n", err);
> -		return err;
> -	}
> +	host1x_client_unregister(&csi->client);
>  
>  	pm_runtime_disable(&pdev->dev);
>  
> diff --git a/drivers/staging/media/tegra-video/vi.c b/drivers/staging/media/tegra-video/vi.c
> index 11dd142c98c5..26f7aedce718 100644
> --- a/drivers/staging/media/tegra-video/vi.c
> +++ b/drivers/staging/media/tegra-video/vi.c
> @@ -2041,14 +2041,8 @@ static int tegra_vi_probe(struct platform_device *pdev)
>  static int tegra_vi_remove(struct platform_device *pdev)
>  {
>  	struct tegra_vi *vi = platform_get_drvdata(pdev);
> -	int err;
>  
> -	err = host1x_client_unregister(&vi->client);
> -	if (err < 0) {
> -		dev_err(&pdev->dev,
> -			"failed to unregister host1x client: %d\n", err);
> -		return err;
> -	}
> +	host1x_client_unregister(&vi->client);
>  
>  	pm_runtime_disable(&pdev->dev);
>  
> diff --git a/include/linux/host1x.h b/include/linux/host1x.h
> index 9a9de4b97a25..9c8119ed13a4 100644
> --- a/include/linux/host1x.h
> +++ b/include/linux/host1x.h
> @@ -443,7 +443,7 @@ int __host1x_client_register(struct host1x_client *client);
>  		__host1x_client_register(client);	\
>  	})
>  
> -int host1x_client_unregister(struct host1x_client *client);
> +void host1x_client_unregister(struct host1x_client *client);
>  
>  int host1x_client_suspend(struct host1x_client *client);
>  int host1x_client_resume(struct host1x_client *client);





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