linux-kernel - Re: [PATCH v2] i2c: imx-lpi2c: add clk_disable

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Date:   Sun, 22 Mar 2020 17:19:23 +0100
From:   Wolfram Sang <wsa@...-dreams.de>
To:     Chuhong Yuan <hslester96@...il.com>,
        Dong Aisheng <aisheng.dong@....com>
Cc:     Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        linux-i2c@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] i2c: imx-lpi2c: add clk_disable_unprepare calls

On Sat, Nov 02, 2019 at 02:21:49PM +0800, Chuhong Yuan wrote:
> The driver forgets to call clk_disable_unprepare when probe fails
> and remove.
> Add the two calls to fix the problem.
> 
> Signed-off-by: Chuhong Yuan <hslester96@...il.com>
> ---

Dong Aisheng, what do you think of this patch?

> Changes in v2:
>   - Adjust the call order to make it consistent in probe failure and
>     removal.
> 
>  drivers/i2c/busses/i2c-imx-lpi2c.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/i2c/busses/i2c-imx-lpi2c.c b/drivers/i2c/busses/i2c-imx-lpi2c.c
> index c92b56485fa6..f964693c0901 100644
> --- a/drivers/i2c/busses/i2c-imx-lpi2c.c
> +++ b/drivers/i2c/busses/i2c-imx-lpi2c.c
> @@ -618,6 +618,7 @@ static int lpi2c_imx_probe(struct platform_device *pdev)
>  	return 0;
>  
>  rpm_disable:
> +	clk_disable_unprepare(lpi2c_imx->clk);
>  	pm_runtime_put(&pdev->dev);
>  	pm_runtime_disable(&pdev->dev);
>  	pm_runtime_dont_use_autosuspend(&pdev->dev);
> @@ -630,6 +631,7 @@ static int lpi2c_imx_remove(struct platform_device *pdev)
>  	struct lpi2c_imx_struct *lpi2c_imx = platform_get_drvdata(pdev);
>  
>  	i2c_del_adapter(&lpi2c_imx->adapter);
> +	clk_disable_unprepare(lpi2c_imx->clk);
>  
>  	pm_runtime_disable(&pdev->dev);
>  	pm_runtime_dont_use_autosuspend(&pdev->dev);
> -- 
> 2.23.0
> 

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