Re: [PATCH 2/2] drm: use dev_name as default unique name in drm_dev_alloc()

[Boris Brezillon <boris.brezillon@free-electrons.com>]

On Tue,  8 Dec 2015 23:12:12 +0100
Nicolas Iooss <nicolas.iooss_linux@m4x.org> wrote:

> The following code pattern exists in some DRM drivers:
> 
>     ddev = drm_dev_alloc(&driver, parent_dev);
>     drm_dev_set_unique(ddev, dev_name(parent_dev));
> 
> (Sometimes dev_name(ddev->dev) is used, which is the same.)
> 
> As suggested in
> http://lists.freedesktop.org/archives/dri-devel/2015-December/096441.html,
> the unique name of a new DRM device can be set as dev_name(parent_dev)
> when parent_dev is not NULL (vgem is a special case).
> 
> Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org>

[for atmel-hlcdc]
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>

> ---
>  drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c | 4 ----
>  drivers/gpu/drm/drm_drv.c                    | 9 +++++++++
>  drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c    | 1 -
>  drivers/gpu/drm/nouveau/nouveau_drm.c        | 4 ----
>  drivers/gpu/drm/rockchip/rockchip_drm_drv.c  | 4 ----
>  drivers/gpu/drm/tegra/drm.c                  | 1 -
>  drivers/gpu/drm/vc4/vc4_drv.c                | 2 --
>  7 files changed, 9 insertions(+), 16 deletions(-)
> 
> diff --git a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
> index 244df0a440b7..fba4f72e7ae1 100644
> --- a/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
> +++ b/drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
> @@ -733,10 +733,6 @@ static int atmel_hlcdc_dc_drm_probe(struct platform_device *pdev)
>  	if (!ddev)
>  		return -ENOMEM;
>  
> -	ret = drm_dev_set_unique(ddev, dev_name(ddev->dev));
> -	if (ret)
> -		goto err_unref;
> -
>  	ret = atmel_hlcdc_dc_load(ddev);
>  	if (ret)
>  		goto err_unref;
> diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
> index 20eaa0aae205..df749a6156e0 100644
> --- a/drivers/gpu/drm/drm_drv.c
> +++ b/drivers/gpu/drm/drm_drv.c
> @@ -633,8 +633,17 @@ struct drm_device *drm_dev_alloc(struct drm_driver *driver,
>  		}
>  	}
>  
> +	if (parent) {
> +		ret = drm_dev_set_unique(dev, dev_name(parent));
> +		if (ret)
> +			goto err_setunique;
> +	}
> +
>  	return dev;
>  
> +err_setunique:
> +	if (drm_core_check_feature(dev, DRIVER_GEM))
> +		drm_gem_destroy(dev);
>  err_ctxbitmap:
>  	drm_legacy_ctxbitmap_cleanup(dev);
>  	drm_ht_remove(&dev->map_hash);
> diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
> index 1930234ba5f1..fca97d3fc846 100644
> --- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
> +++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c
> @@ -363,7 +363,6 @@ static int fsl_dcu_drm_probe(struct platform_device *pdev)
>  	fsl_dev->np = dev->of_node;
>  	drm->dev_private = fsl_dev;
>  	dev_set_drvdata(dev, fsl_dev);
> -	drm_dev_set_unique(drm, dev_name(dev));
>  
>  	ret = drm_dev_register(drm, 0);
>  	if (ret < 0)
> diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c
> index 2d23f95f17ce..b3a563c44bcd 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_drm.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_drm.c
> @@ -1046,10 +1046,6 @@ nouveau_platform_device_create(const struct nvkm_device_tegra_func *func,
>  		goto err_free;
>  	}
>  
> -	err = drm_dev_set_unique(drm, dev_name(&pdev->dev));
> -	if (err < 0)
> -		goto err_free;
> -
>  	drm->platformdev = pdev;
>  	platform_set_drvdata(pdev, drm);
>  
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
> index 215d6c44af55..afbb7407c44f 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_drv.c
> @@ -450,10 +450,6 @@ static int rockchip_drm_bind(struct device *dev)
>  	if (!drm)
>  		return -ENOMEM;
>  
> -	ret = drm_dev_set_unique(drm, dev_name(dev));
> -	if (ret)
> -		goto err_free;
> -
>  	ret = drm_dev_register(drm, 0);
>  	if (ret)
>  		goto err_free;
> diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c
> index 159ef515cab1..12e2d3ccbc9d 100644
> --- a/drivers/gpu/drm/tegra/drm.c
> +++ b/drivers/gpu/drm/tegra/drm.c
> @@ -991,7 +991,6 @@ static int host1x_drm_probe(struct host1x_device *dev)
>  	if (!drm)
>  		return -ENOMEM;
>  
> -	drm_dev_set_unique(drm, dev_name(&dev->dev));
>  	dev_set_drvdata(&dev->dev, drm);
>  
>  	err = drm_dev_register(drm, 0);
> diff --git a/drivers/gpu/drm/vc4/vc4_drv.c b/drivers/gpu/drm/vc4/vc4_drv.c
> index d5db9e0f3b73..647772305e8f 100644
> --- a/drivers/gpu/drm/vc4/vc4_drv.c
> +++ b/drivers/gpu/drm/vc4/vc4_drv.c
> @@ -168,8 +168,6 @@ static int vc4_drm_bind(struct device *dev)
>  	vc4->dev = drm;
>  	drm->dev_private = vc4;
>  
> -	drm_dev_set_unique(drm, dev_name(dev));
> -
>  	drm_mode_config_init(drm);
>  	if (ret)
>  		goto unref;



-- 
Boris Brezillon, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com
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