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

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Message-ID: <577EFC59.40905@linux.intel.com>
Date:	Fri, 8 Jul 2016 09:05:29 +0800
From:	Lu Baolu <baolu.lu@...ux.intel.com>
To:	Joseph Salisbury <joseph.salisbury@...onical.com>,
	gregkh@...uxfoundation.org, hdegoede@...hat.com,
	adrienverge@...il.com, yaowen@...gle.com, vpalatin@...omium.org,
	stern@...land.harvard.edu
Cc:	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

Hi,

On 07/07/2016 05:53 AM, Joseph Salisbury wrote:
> BugLink: http://bugs.launchpad.net/bugs/1498667
>
> As reported in BugLink, this device has an issue with Linux Power Management so 

s/"Linux Power Management"/"USB Link Power Management"

Best regards,
Lu Baolu

> 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 },
>  
>  	/* Acer C120 LED Projector */
>  	{ USB_DEVICE(0x1de1, 0xc102), .driver_info = USB_QUIRK_NO_LPM },