linux-kernel - Re: [PATCH] drm/tilcdc: Fix irq free on unload

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <c7932fed-176f-e113-9a80-f6c5528a9414@ti.com>
Date:   Tue, 31 Oct 2023 21:43:30 +0530
From:   Aradhya Bhatia <a-bhatia1@...com>
To:     Tomi Valkeinen <tomi.valkeinen@...asonboard.com>,
        Jyri Sarha <jyri.sarha@....fi>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Thomas Zimmermann <tzimmermann@...e.de>,
        Sam Ravnborg <sam@...nborg.org>
CC:     <linux-kernel@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>
Subject: Re: [PATCH] drm/tilcdc: Fix irq free on unload



On 19-Sep-23 12:42, Tomi Valkeinen wrote:
> The driver only frees the reserved irq if priv->irq_enabled is set to
> true. However, the driver mistakenly sets priv->irq_enabled to false,
> instead of true, in tilcdc_irq_install(), and thus the driver never
> frees the irq, causing issues on loading the driver a second time.
> 
> Fixes: b6366814fa77 ("drm/tilcdc: Convert to Linux IRQ interfaces")
> Cc: Thomas Zimmermann <tzimmermann@...e.de>
> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
> ---

Reviewed-by: Aradhya Bhatia <a-bhatia1@...com>

Regards
Aradhya

>  drivers/gpu/drm/tilcdc/tilcdc_drv.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.c b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
> index fe56beea3e93..83233bdc0526 100644
> --- a/drivers/gpu/drm/tilcdc/tilcdc_drv.c
> +++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.c
> @@ -138,7 +138,7 @@ static int tilcdc_irq_install(struct drm_device *dev, unsigned int irq)
>  	if (ret)
>  		return ret;
>  
> -	priv->irq_enabled = false;
> +	priv->irq_enabled = true;
>  
>  	return 0;
>  }
> 
> ---
> base-commit: 0663e1da5ba8e6459e3555ac12c62741668c0d30
> change-id: 20230919-lcdc-9e09e94f4e93
> 
> Best regards,