Re: [PATCH] remoteproc: imx_rproc: Fix a resource leak in the remove function

From: Mathieu Poirier <mathieu.poirier@linaro.org>
To: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Cc: ohad@wizery.com, bjorn.andersson@linaro.org, shawnguo@kernel.org,
	s.hauer@pengutronix.de, kernel@pengutronix.de,
	festevam@gmail.com, linux-imx@nxp.com, hongxing.zhu@nxp.com,
	peng.fan@nxp.com, linux-remoteproc@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: Re: [PATCH] remoteproc: imx_rproc: Fix a resource leak in the remove function
Date: Thu, 21 Oct 2021 11:41:04 -0600	[thread overview]
Message-ID: <20211021174104.GA3562838@p14s> (raw)
In-Reply-To: <d28ca94a4031bd7297d47c2164e18885a5a6ec19.1634366546.git.christophe.jaillet@wanadoo.fr>

On Sat, Oct 16, 2021 at 08:44:28AM +0200, Christophe JAILLET wrote:
> 'priv->workqueue' is destroyed in the error handling path of the probe but
> not in the remove function.
> 
> Add the missing call to release some resources.
> 
> Fixes: 2df7062002d0 ("remoteproc: imx_proc: enable virtio/mailbox")
> Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
> ---
> This patch is speculative. I'm not sure if the added function call is at
> the right place in the remove function.
> Review with care.
> ---
>  drivers/remoteproc/imx_rproc.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/remoteproc/imx_rproc.c b/drivers/remoteproc/imx_rproc.c
> index ff8170dbbc3c..0a45bc0d3f73 100644
> --- a/drivers/remoteproc/imx_rproc.c
> +++ b/drivers/remoteproc/imx_rproc.c
> @@ -804,6 +804,7 @@ static int imx_rproc_remove(struct platform_device *pdev)
>  	clk_disable_unprepare(priv->clk);
>  	rproc_del(rproc);
>  	imx_rproc_free_mbox(rproc);
> +	destroy_workqueue(priv->workqueue);

This seems to be the right thing to do. Peng - please review and test on your
side.

Thanks,
Mathieu

>  	rproc_free(rproc);
>  
>  	return 0;
> -- 
> 2.30.2
> 