| From c68929f75dfcb6354918862b91b5778585de1fa5 Mon Sep 17 00:00:00 2001 |
| From: Johan Hovold <johan@kernel.org> |
| Date: Mon, 25 Aug 2014 17:51:27 +0200 |
| Subject: USB: quirks: enable device-qualifier quirk for Elan Touchscreen |
| |
| From: Johan Hovold <johan@kernel.org> |
| |
| 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@gmail.com> |
| Reported-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| Signed-off-by: Johan Hovold <johan@kernel.org> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| --- |
| 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 }, |
| |
