linux-kernel - Re: [PATCH] ACPI / sleep: EC-based wakeup from suspend-to-idle on recent systems

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Date:   Fri, 23 Jun 2017 14:13:57 +0200
From:   "Rafael J. Wysocki" <rjw@...ysocki.net>
To:     "Zheng, Lv" <lv.zheng@...el.com>
Cc:     Linux ACPI <linux-acpi@...r.kernel.org>,
        Linux PM <linux-pm@...r.kernel.org>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
        Darren Hart <dvhart@...radead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>,
        Mario Limonciello <mario.limonciello@...l.com>,
        Tom Lanyon <tom@...shoeco.com>,
        Jér?me de Bretagne 
        <jerome.debretagne@...il.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH] ACPI / sleep: EC-based wakeup from suspend-to-idle on recent systems

On Friday, June 23, 2017 06:30:35 AM Zheng, Lv wrote:
> Hi, Rafael
> 

[cut]

> > 
> > Index: linux-pm/drivers/acpi/ec.c
> > ===================================================================
> > --- linux-pm.orig/drivers/acpi/ec.c
> > +++ linux-pm/drivers/acpi/ec.c
> > @@ -1835,7 +1835,7 @@ static int acpi_ec_suspend(struct device
> >  	struct acpi_ec *ec =
> >  		acpi_driver_data(to_acpi_device(dev));
> > 
> > -	if (ec_freeze_events)
> > +	if (acpi_sleep_no_ec_events() && ec_freeze_events)
> >  		acpi_ec_disable_event(ec);
> >  	return 0;
> >  }
> 
> I just notice a slight pontential issue.
> Should we add a similar change to acpi_ec_stop()?

Yes, it looks like that, thanks!

Rafael