linux-kernel - Re: [PATCH 1/1] usb: quirks: Add no-lpm quirk for Elan Microelectronics Touchpad

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Date:	Wed, 6 Jul 2016 16:10:58 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Joseph Salisbury <joseph.salisbury@...onical.com>
Cc:	hdegoede@...hat.com, adrienverge@...il.com, yaowen@...gle.com,
	vpalatin@...omium.org, stern@...land.harvard.edu,
	linux-kernel@...r.kernel.org, linux-usb@...r.kernel.org,
	stable@...r.kernel.org
Subject: Re: [PATCH 1/1] usb: quirks: Add no-lpm quirk for Elan
 Microelectronics Touchpad

On Wed, Jul 06, 2016 at 05:53:47PM -0400, Joseph Salisbury wrote:
> BugLink: http://bugs.launchpad.net/bugs/1498667
> 
> As reported in BugLink, this device has an issue with Linux Power Management so 
> adding a quirk.  This quirk was reccomended by Alan Stern:
> 
> http://lkml.iu.edu/hypermail/linux/kernel/1606.2/05590.html
> 
> Signed-off-by: Joseph Salisbury <joseph.salisbury@...onical.com>
> Cc: stable <stable@...r.kernel.org>
> 
> ---
>  drivers/usb/core/quirks.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
> index 944a6dc..a33d003 100644
> --- a/drivers/usb/core/quirks.c
> +++ b/drivers/usb/core/quirks.c
> @@ -198,6 +198,9 @@ static const struct usb_device_id usb_quirk_list[] = {
>  	/* Protocol and OTG Electrical Test Device */
>  	{ USB_DEVICE(0x1a0a, 0x0200), .driver_info =
>  			USB_QUIRK_LINEAR_UFRAME_INTR_BINTERVAL },
> +
> +	/* ELAN Microelectronics Touchscreen */
> +	{ USB_DEVICE(0x04f3, 0x0381), .driver_info = USB_QUIRK_NO_LPM },

Please put this next to the other Elan touchscreen quirk entries, don't
put them in random order, it's a pain to maintain that way...

thanks,

greg k-h