usb: cdc_acm: Add quirk for Castles VEGA3000

commit 1445cbe476fc3dd09c0b380b206526a49403c071 upstream.

The device (a POS terminal) implements CDC ACM, but has not union
descriptor.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Acked-by: Oliver Neukum <oneukum@suse.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 7ed30d0..a501f3b 100644 (file)
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -1771,6 +1771,9 @@ static const struct usb_device_id acm_ids[] = {
        { USB_DEVICE(0x09d8, 0x0320), /* Elatec GmbH TWN3 */
        .driver_info = NO_UNION_NORMAL, /* has misplaced union descriptor */
        },
+       { USB_DEVICE(0x0ca6, 0xa050), /* Castles VEGA3000 */
+       .driver_info = NO_UNION_NORMAL, /* reports zero length descriptor */
+       },
 
        { USB_DEVICE(0x2912, 0x0001), /* ATOL FPrint */
        .driver_info = CLEAR_HALT_CONDITIONS,