This is a note to let you know that I've just added the patch titled
USB: quirks: enable device-qualifier quirk for Elan Touchscreen
to the 3.17-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
usb-quirks-enable-device-qualifier-quirk-for-elan-touchscreen.patch
and it can be found in the queue-3.17 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From c68929f75dfcb6354918862b91b5778585de1fa5 Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@xxxxxxxxxx>
Date: Mon, 25 Aug 2014 17:51:27 +0200
Subject: USB: quirks: enable device-qualifier quirk for Elan Touchscreen
From: Johan Hovold <johan@xxxxxxxxxx>
commit c68929f75dfcb6354918862b91b5778585de1fa5 upstream.
Enable device-qualifier quirk for Elan Touchscreen, which often fails to
handle requests for the device_descriptor.
Note that the device sometimes do respond properly with a Request Error
(three times as USB core retries), but usually fails to respond at all.
When this happens any further descriptor requests also fails, for
example:
[ 1528.688934] usb 2-7: new full-speed USB device number 4 using xhci_hcd
[ 1530.945588] usb 2-7: unable to read config index 0 descriptor/start: -71
[ 1530.945592] usb 2-7: can't read configurations, error -71
This has been observed repeating for over a minute before eventual
successful enumeration.
Reported-by: Drew Von Spreecken <drewvs@xxxxxxxxx>
Reported-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Johan Hovold <johan@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/core/quirks.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -93,6 +93,10 @@ static const struct usb_device_id usb_qu
{ USB_DEVICE(0x04e8, 0x6601), .driver_info =
USB_QUIRK_CONFIG_INTF_STRINGS },
+ /* Elan Touchscreen */
+ { USB_DEVICE(0x04f3, 0x0089), .driver_info =
+ USB_QUIRK_DEVICE_QUALIFIER },
+
/* Roland SC-8820 */
{ USB_DEVICE(0x0582, 0x0007), .driver_info = USB_QUIRK_RESET_RESUME },
Patches currently in stable-queue which might be from johan@xxxxxxxxxx are
queue-3.17/usb-option-add-haier-ce81b-cdma-modem.patch
queue-3.17/usb-cdc-acm-add-quirk-for-control-line-state-requests.patch
queue-3.17/usb-cdc-acm-add-device-id-for-gw-instek-afg-2225.patch
queue-3.17/usb-option-add-support-for-telit-le910.patch
queue-3.17/usb-core-add-device-qualifier-quirk.patch
queue-3.17/usb-quirks-enable-device-qualifier-quirk-for-elan-touchscreen.patch
queue-3.17/usb-serial-ftdi_sio-add-awinda-station-and-dongle-products.patch
queue-3.17/usb-serial-cp210x-add-silicon-labs-358x-vid-and-pid.patch
queue-3.17/usb-cdc-acm-only-raise-dtr-on-transitions-from-b0.patch
queue-3.17/usb-serial-ftdi_sio-add-bricked-ftdi-device-pid.patch
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