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

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Date:   Wed, 26 Oct 2016 15:22:14 +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 Wed, 26 Oct 2016, Lee Jones wrote:

> 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.

Ah, I thought you'd at least ported it to Mainline!

You need to do that before posting patches.

> > 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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