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authorJohan Hovold <johan@kernel.org>2014-08-25 17:51:27 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-09-23 21:15:39 -0700
commitc68929f75dfcb6354918862b91b5778585de1fa5 (patch)
treed3d3261149ee319ff280900e88f7d4c3723e4266 /drivers/usb/core
parent2a159389bf5d962359349a76827b2f683276a1c7 (diff)
downloadlinux-c68929f75dfcb6354918862b91b5778585de1fa5.tar.bz2
USB: quirks: enable device-qualifier quirk for Elan Touchscreen
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>
Diffstat (limited to 'drivers/usb/core')
-rw-r--r--drivers/usb/core/quirks.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/usb/core/quirks.c b/drivers/usb/core/quirks.c
index bae636e2a1a3..a342a783d496 100644
--- a/drivers/usb/core/quirks.c
+++ b/drivers/usb/core/quirks.c
@@ -93,6 +93,10 @@ static const struct usb_device_id usb_quirk_list[] = {
{ 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 },