linux-kernel - Re: [PATCH] drm/tidss: Use the new api devm_drm_irq

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Message-ID: <20201209004828.GN401619@phenom.ffwll.local>
Date:   Wed, 9 Dec 2020 01:48:28 +0100
From:   Daniel Vetter <daniel@...ll.ch>
To:     Tian Tao <tiantao6@...ilicon.com>
Cc:     jsarha@...com, tomi.valkeinen@...com, airlied@...ux.ie,
        daniel@...ll.ch, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/tidss: Use the new api devm_drm_irq_install

On Tue, Dec 08, 2020 at 03:50:59PM +0800, Tian Tao wrote:
> Use devm_drm_irq_install to register interrupts so that
> drm_irq_uninstall is not needed to be called.
> 
> Signed-off-by: Tian Tao <tiantao6@...ilicon.com>

There's another drm_irq_install in the error path. But I'm not sure this
is safe since you're chaning the order in which things get cleaned up now.
So leaving this up to Tomi.
-Daniel

> ---
>  drivers/gpu/drm/tidss/tidss_drv.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/drivers/gpu/drm/tidss/tidss_drv.c b/drivers/gpu/drm/tidss/tidss_drv.c
> index 66e3c86e..48e1f9d 100644
> --- a/drivers/gpu/drm/tidss/tidss_drv.c
> +++ b/drivers/gpu/drm/tidss/tidss_drv.c
> @@ -173,7 +173,7 @@ static int tidss_probe(struct platform_device *pdev)
>  		goto err_runtime_suspend;
>  	}
>  
> -	ret = drm_irq_install(ddev, irq);
> +	ret = devm_irq_install(ddev, irq);
>  	if (ret) {
>  		dev_err(dev, "drm_irq_install failed: %d\n", ret);
>  		goto err_runtime_suspend;
> @@ -219,8 +219,6 @@ static int tidss_remove(struct platform_device *pdev)
>  
>  	drm_atomic_helper_shutdown(ddev);
>  
> -	drm_irq_uninstall(ddev);
> -
>  #ifndef CONFIG_PM
>  	/* If we don't have PM, we need to call suspend manually */
>  	dispc_runtime_suspend(tidss->dispc);
> -- 
> 2.7.4
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch