Re: [PATCH 38/51] drm/stm: Drop explicit drm_mode_config_cleanup call

From: Sam Ravnborg <sam@ravnborg.org>
To: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Thomas Zimmermann <tzimmermann@suse.de>,
	Intel Graphics Development <intel-gfx@lists.freedesktop.org>,
	Philippe Cornu <philippe.cornu@st.com>,
	DRI Development <dri-devel@lists.freedesktop.org>,
	Yannick Fertre <yannick.fertre@st.com>,
	Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
	Maxime Coquelin <mcoquelin.stm32@gmail.com>,
	Daniel Vetter <daniel.vetter@intel.com>,
	Vincent Abriou <vincent.abriou@st.com>,
	linux-stm32@st-md-mailman.stormreply.com,
	linux-arm-kernel@lists.infradead.org,
	Alexandre Torgue <alexandre.torgue@st.com>
Subject: Re: [PATCH 38/51] drm/stm: Drop explicit drm_mode_config_cleanup call
Date: Sat, 7 Mar 2020 10:25:39 +0100	[thread overview]
Message-ID: <20200307092539.GG28810@ravnborg.org> (raw)
In-Reply-To: <20200302222631.3861340-39-daniel.vetter@ffwll.ch>

On Mon, Mar 02, 2020 at 11:26:18PM +0100, Daniel Vetter wrote:
> It's right above the drm_dev_put().
> 
> This is made possible by a preceeding patch which added a drmm_
> cleanup action to drm_mode_config_init(), hence all we need to do to
> ensure that drm_mode_config_cleanup() is run on final drm_device
> cleanup is check the new error code for _init().
> 
> Aside: Another driver with a bit much devm_kzalloc, which should
> probably use drmm_kzalloc instead ...
> 
> v2: Explain why this cleanup is possible (Laurent).
> 
> v3: Use drmm_mode_config_init() for more clarity (Sam, Thomas)
> 
> Cc: Sam Ravnborg <sam@ravnborg.org>
> Cc: Thomas Zimmermann <tzimmermann@suse.de>
> Acked-by: Philippe Cornu <philippe.cornu@st.com>
> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
> Cc: Yannick Fertre <yannick.fertre@st.com>
> Cc: Philippe Cornu <philippe.cornu@st.com>
> Cc: Benjamin Gaignard <benjamin.gaignard@linaro.org>
> Cc: Vincent Abriou <vincent.abriou@st.com>
> Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
> Cc: Alexandre Torgue <alexandre.torgue@st.com>
> Cc: linux-stm32@st-md-mailman.stormreply.com
> Cc: linux-arm-kernel@lists.infradead.org

Acked-by: Sam Ravnborg <sam@ravnborg.org>

> ---
>  drivers/gpu/drm/stm/drv.c | 10 ++++------
>  1 file changed, 4 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/gpu/drm/stm/drv.c b/drivers/gpu/drm/stm/drv.c
> index ea9fcbdc68b3..0f85dd86cafa 100644
> --- a/drivers/gpu/drm/stm/drv.c
> +++ b/drivers/gpu/drm/stm/drv.c
> @@ -88,7 +88,9 @@ static int drv_load(struct drm_device *ddev)
>  
>  	ddev->dev_private = (void *)ldev;
>  
> -	drm_mode_config_init(ddev);
> +	ret = drmm_mode_config_init(ddev);
> +	if (ret)
> +		return ret;
>  
>  	/*
>  	 * set max width and height as default value.
> @@ -103,7 +105,7 @@ static int drv_load(struct drm_device *ddev)
>  
>  	ret = ltdc_load(ddev);
>  	if (ret)
> -		goto err;
> +		return ret;
>  
>  	drm_mode_config_reset(ddev);
>  	drm_kms_helper_poll_init(ddev);
> @@ -111,9 +113,6 @@ static int drv_load(struct drm_device *ddev)
>  	platform_set_drvdata(pdev, ddev);
>  
>  	return 0;
> -err:
> -	drm_mode_config_cleanup(ddev);
> -	return ret;
>  }
>  
>  static void drv_unload(struct drm_device *ddev)
> @@ -122,7 +121,6 @@ static void drv_unload(struct drm_device *ddev)
>  
>  	drm_kms_helper_poll_fini(ddev);
>  	ltdc_unload(ddev);
> -	drm_mode_config_cleanup(ddev);
>  }
>  
>  static __maybe_unused int drv_suspend(struct device *dev)
> -- 
> 2.24.1
> 
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

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