linux-kernel - Re: [PATCH] HID: i2c-hid: disable interrupt on suspend

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Message-ID: <52936FC5.3060905@redhat.com>
Date:	Mon, 25 Nov 2013 10:41:57 -0500
From:	Benjamin Tissoires <benjamin.tissoires@...hat.com>
To:	Mika Westerberg <mika.westerberg@...ux.intel.com>,
	Jiri Kosina <jkosina@...e.cz>
CC:	Jean Delvare <khali@...ux-fr.org>, linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org, Jerome Blin <jerome.blin@...el.com>
Subject: Re: [PATCH] HID: i2c-hid: disable interrupt on suspend

On 13/11/13 06:34, Mika Westerberg wrote:
> When an I2C HID device is powered of during system sleep, as a result of
> removing its power resources (by the ACPI core) the interrupt line might go
> low as well. This results inadvertent interrupt and wakes the system from
> sleep immediately.
> 
> To prevent this we disable the device interrupt in the drivers suspend
> method and enable it on resume. The device can still wake the system up if
> it is wake capable (this also means that not all of its power will be
> removed to keep the interrupt line high).
> 
> Reported-by: Jerome Blin <jerome.blin@...el.com>
> Signed-off-by: Mika Westerberg <mika.westerberg@...ux.intel.com>
> ---

Jiri, just FYI, I still do not have any final consumer ready i2c-hid
hardware. So I can not test/debug anything related to the suspend-resume.

If Mika tested it properly (which I expect), you may consider pulling
this one.

Cheers,
Benjamin
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