linux-kernel - [PATCH] usb: cdc_acm: Add quirk for Castles VEGA3000

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Message-Id: <20180710062849.915863-1-lkundrak@v3.sk>
Date:   Tue, 10 Jul 2018 08:28:49 +0200
From:   Lubomir Rintel <lkundrak@...sk>
To:     linux-usb@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, Oliver Neukum <oneukum@...e.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Lubomir Rintel <lkundrak@...sk>
Subject: [PATCH] usb: cdc_acm: Add quirk for Castles VEGA3000

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

Signed-off-by: Lubomir Rintel <lkundrak@...sk>
---
 drivers/usb/class/cdc-acm.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 998b32d0167e..75c4623ad779 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -1831,6 +1831,9 @@ 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,
-- 
2.17.1