[PATCH] usb: cdc_acm: Add quirk for Uniden BC125AT scanner

[Jared Baldridge]

Uniden BC125AT radio scanner has a USB interface which fails to work
with the cdc_acm driver:
 usb 1-1: new full-speed USB device number 2 using uhci_hcd
 cdc_acm 1-1:1.0: Zero length descriptor references
 cdc_acm 1-1:1.0: probe with driver cdc_acm failed with error -22
 usbcore: registered new interface driver cdc_acm

Adding the NO_UNION_NORMAL quirk for the device fixes the issue:

 usb 1-1: new full-speed USB device number 2 using uhci_hcd
 cdc_acm 1-1:1.0: ttyACM0: USB ACM device
 usbcore: registered new interface driver cdc_acm

`lsusb -v` of the device:

 Bus 001 Device 002: ID 1965:0017 Uniden Corporation BC125AT
 Negotiated speed: Full Speed (12Mbps)
 Device Descriptor:
   bLength                18
   bDescriptorType         1
   bcdUSB               2.00
   bDeviceClass            2 Communications
   bDeviceSubClass         0 [unknown]
   bDeviceProtocol         0
   bMaxPacketSize0        64
   idVendor           0x1965 Uniden Corporation
   idProduct          0x0017 BC125AT
   bcdDevice            0.01
   iManufacturer           1 Uniden America Corp.
   iProduct                2 BC125AT
   iSerial                 3 0001
   bNumConfigurations      1
   Configuration Descriptor:
     bLength                 9
     bDescriptorType         2
     wTotalLength       0x0030
     bNumInterfaces          2
     bConfigurationValue     1
     iConfiguration          0
     bmAttributes         0x80
       (Bus Powered)
     MaxPower              500mA
     Interface Descriptor:
       bLength                 9
       bDescriptorType         4
       bInterfaceNumber        0
       bAlternateSetting       0
       bNumEndpoints           1
       bInterfaceClass         2 Communications
       bInterfaceSubClass      2 Abstract (modem)
       bInterfaceProtocol      0
       iInterface              0
       Endpoint Descriptor:
         bLength                 7
         bDescriptorType         5
         bEndpointAddress     0x87  EP 7 IN
         bmAttributes            3
           Transfer Type            Interrupt
           Synch Type               None
           Usage Type               Data
         wMaxPacketSize     0x0008  1x 8 bytes
         bInterval              10
     Interface Descriptor:
       bLength                 9
       bDescriptorType         4
       bInterfaceNumber        1
       bAlternateSetting       0
       bNumEndpoints           2
       bInterfaceClass        10 CDC Data
       bInterfaceSubClass      0 [unknown]
       bInterfaceProtocol      0
       iInterface              0
       Endpoint Descriptor:
         bLength                 7
         bDescriptorType         5
         bEndpointAddress     0x81  EP 1 IN
         bmAttributes            2
           Transfer Type            Bulk
           Synch Type               None
           Usage Type               Data
         wMaxPacketSize     0x0040  1x 64 bytes
         bInterval               0
       Endpoint Descriptor:
         bLength                 7
         bDescriptorType         5
         bEndpointAddress     0x02  EP 2 OUT
         bmAttributes            2
           Transfer Type            Bulk
           Synch Type               None
           Usage Type               Data
         wMaxPacketSize     0x0040  1x 64 bytes
         bInterval               0
 Device Status:     0x0000
   (Bus Powered)

Signed-off-by: Jared Baldridge <jrb@xxxxxxxxxx>
---
 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 ddf0b5963859..3cb372721282 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -1810,6 +1810,9 @@ static const struct usb_device_id acm_ids[] = {
 	{ USB_DEVICE(0x1901, 0x0006), /* GE Healthcare Patient Monitor UI Controller */
 	.driver_info = DISABLE_ECHO, /* DISABLE ECHO in termios flag */
 	},
+	{ USB_DEVICE(0x1965, 0x0017), /* Uniden BC125AT */
+	.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
+	},
 	{ USB_DEVICE(0x1965, 0x0018), /* Uniden UBC125XLT */
 	.driver_info = NO_UNION_NORMAL, /* has no union descriptor */
 	},
-- 
2.54.0