linux-kernel - Re: [PATCH] CHROMIUM: ec: register shutdown function to clear delayed works

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Message-ID: <20161026140403.GG13127@dell>
Date:   Wed, 26 Oct 2016 15:04:03 +0100
From:   Lee Jones <lee.jones@...aro.org>
To:     Daniel Hung-yu Wu <hywu@...gle.com>
Cc:     Samuel Ortiz <sameo@...ux.intel.com>, hywu@...omium.org,
        ejcaruso@...omium.org, drinkcat@...omium.org, kyan@...omium.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] CHROMIUM: ec: register shutdown function to clear
 delayed works

On Mon, 24 Oct 2016, Daniel Hung-yu Wu wrote:

> This patch applies on top of "mfd: cros_ec: Add EC console read structures
> definitions" (https://patchwork.kernel.org/patch/9294887/).
> 
> This patch is currently against a linux 3.18 kernel.
> 
> Reboot or shutdown during delayed works could corrupt communication with EC,
> and certain I2C controller may not be able to recover from the error state.
> A shutdown function is registered to clear delayed works or wait for them to
> finish.
> 
> Signed-off-by: Daniel Hung-yu Wu <hywu@...omium.org>
> ---
>  drivers/mfd/cros_ec_dev.c | 9 +++++++++
>  1 file changed, 9 insertions(+)

Applied, thanks.

> diff --git a/drivers/mfd/cros_ec_dev.c b/drivers/mfd/cros_ec_dev.c
> index 8618a7c..3e548f1 100644
> --- a/drivers/mfd/cros_ec_dev.c
> +++ b/drivers/mfd/cros_ec_dev.c
> @@ -613,6 +613,14 @@ static int ec_device_remove(struct platform_device *pdev)
>  	return 0;
>  }
>  
> +static void ec_device_shutdown(struct platform_device *pdev)
> +{
> +	struct cros_ec_dev *ec = dev_get_drvdata(&pdev->dev);
> +
> +	/* Be sure to clear up debugfs delayed works */
> +	cros_ec_debugfs_remove(ec);
> +}
> +
>  static int ec_device_suspend(struct device *dev)
>  {
>  	struct cros_ec_dev *ec = dev_get_drvdata(dev);
> @@ -656,6 +664,7 @@ static struct platform_driver cros_ec_dev_driver = {
>  	},
>  	.probe = ec_device_probe,
>  	.remove = ec_device_remove,
> +	.shutdown = ec_device_shutdown,
>  };
>  
>  static int __init cros_ec_dev_init(void)

-- 
Lee Jones
Linaro STMicroelectronics Landing Team Lead
Linaro.org │ Open source software for ARM SoCs
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