[PATCH] drm: shmobile: Use devm_* managed functions

[Laurent Pinchart]

Hi Dave,

Could you please take this patch in your tree for v3.11 ?

On Thursday 25 April 2013 12:14:54 Laurent Pinchart wrote:
> This simplifies cleanup paths and fixes a probe time crash in the error
> path when trying to cleanup mode setting before it was initialized.
> 
> Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas at ideasonboard.com>
> ---
>  drivers/gpu/drm/shmobile/shmob_drm_drv.c   | 28 +++++++++------------------
>  drivers/gpu/drm/shmobile/shmob_drm_plane.c |  7 +------
>  2 files changed, 10 insertions(+), 25 deletions(-)
> 
> diff --git a/drivers/gpu/drm/shmobile/shmob_drm_drv.c
> b/drivers/gpu/drm/shmobile/shmob_drm_drv.c index f6e0b53..29d15e3 100644
> --- a/drivers/gpu/drm/shmobile/shmob_drm_drv.c
> +++ b/drivers/gpu/drm/shmobile/shmob_drm_drv.c
> @@ -90,7 +90,7 @@ static int shmob_drm_setup_clocks(struct shmob_drm_device
> *sdev, return -EINVAL;
>  	}
> 
> -	clk = clk_get(sdev->dev, clkname);
> +	clk = devm_clk_get(sdev->dev, clkname);
>  	if (IS_ERR(clk)) {
>  		dev_err(sdev->dev, "cannot get dot clock %s\n", clkname);
>  		return PTR_ERR(clk);
> @@ -106,21 +106,12 @@ static int shmob_drm_setup_clocks(struct
> shmob_drm_device *sdev,
> 
>  static int shmob_drm_unload(struct drm_device *dev)
>  {
> -	struct shmob_drm_device *sdev = dev->dev_private;
> -
>  	drm_kms_helper_poll_fini(dev);
>  	drm_mode_config_cleanup(dev);
>  	drm_vblank_cleanup(dev);
>  	drm_irq_uninstall(dev);
> 
> -	if (sdev->clock)
> -		clk_put(sdev->clock);
> -
> -	if (sdev->mmio)
> -		iounmap(sdev->mmio);
> -
>  	dev->dev_private = NULL;
> -	kfree(sdev);
> 
>  	return 0;
>  }
> @@ -139,7 +130,7 @@ static int shmob_drm_load(struct drm_device *dev,
> unsigned long flags) return -EINVAL;
>  	}
> 
> -	sdev = kzalloc(sizeof(*sdev), GFP_KERNEL);
> +	sdev = devm_kzalloc(&pdev->dev, sizeof(*sdev), GFP_KERNEL);
>  	if (sdev == NULL) {
>  		dev_err(dev->dev, "failed to allocate private data\n");
>  		return -ENOMEM;
> @@ -156,29 +147,28 @@ static int shmob_drm_load(struct drm_device *dev,
> unsigned long flags) res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
>  	if (res == NULL) {
>  		dev_err(&pdev->dev, "failed to get memory resource\n");
> -		ret = -EINVAL;
> -		goto done;
> +		return -EINVAL;
>  	}
> 
> -	sdev->mmio = ioremap_nocache(res->start, resource_size(res));
> +	sdev->mmio = devm_ioremap_nocache(&pdev->dev, res->start,
> +					  resource_size(res));
>  	if (sdev->mmio == NULL) {
>  		dev_err(&pdev->dev, "failed to remap memory resource\n");
> -		ret = -ENOMEM;
> -		goto done;
> +		return -ENOMEM;
>  	}
> 
>  	ret = shmob_drm_setup_clocks(sdev, pdata->clk_source);
>  	if (ret < 0)
> -		goto done;
> +		return ret;
> 
>  	ret = shmob_drm_init_interface(sdev);
>  	if (ret < 0)
> -		goto done;
> +		return ret;
> 
>  	ret = shmob_drm_modeset_init(sdev);
>  	if (ret < 0) {
>  		dev_err(&pdev->dev, "failed to initialize mode setting\n");
> -		goto done;
> +		return ret;
>  	}
> 
>  	for (i = 0; i < 4; ++i) {
> diff --git a/drivers/gpu/drm/shmobile/shmob_drm_plane.c
> b/drivers/gpu/drm/shmobile/shmob_drm_plane.c index e1eb899..6898f6f 100644
> --- a/drivers/gpu/drm/shmobile/shmob_drm_plane.c
> +++ b/drivers/gpu/drm/shmobile/shmob_drm_plane.c
> @@ -221,11 +221,8 @@ static int shmob_drm_plane_disable(struct drm_plane
> *plane)
> 
>  static void shmob_drm_plane_destroy(struct drm_plane *plane)
>  {
> -	struct shmob_drm_plane *splane = to_shmob_plane(plane);
> -
>  	shmob_drm_plane_disable(plane);
>  	drm_plane_cleanup(plane);
> -	kfree(splane);
>  }
> 
>  static const struct drm_plane_funcs shmob_drm_plane_funcs = {
> @@ -251,7 +248,7 @@ int shmob_drm_plane_create(struct shmob_drm_device
> *sdev, unsigned int index) struct shmob_drm_plane *splane;
>  	int ret;
> 
> -	splane = kzalloc(sizeof(*splane), GFP_KERNEL);
> +	splane = devm_kzalloc(sdev->dev, sizeof(*splane), GFP_KERNEL);
>  	if (splane == NULL)
>  		return -ENOMEM;
> 
> @@ -261,8 +258,6 @@ int shmob_drm_plane_create(struct shmob_drm_device
> *sdev, unsigned int index) ret = drm_plane_init(sdev->ddev, &splane->plane,
> 1,
>  			     &shmob_drm_plane_funcs, formats,
>  			     ARRAY_SIZE(formats), false);
> -	if (ret < 0)
> -		kfree(splane);
> 
>  	return ret;
>  }
-- 
Regards,

Laurent Pinchart