Telit 3G Intel based modems require zero packet to be sent if
out data size is equal to the endpoint max packet size.
Signed-off-by: Daniele Palmas <dnlplm@xxxxxxxxx>
---
drivers/usb/class/cdc-acm.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index 1b68fed..195fb83 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -1855,6 +1855,13 @@ static const struct usb_device_id acm_ids[] = {
.driver_info = IGNORE_DEVICE,
},
+ { USB_DEVICE(0x1bc7, 0x0021), /* Telit 3G ACM only composition */
+ .driver_info = SEND_ZERO_PACKET,
+ },
+ { USB_DEVICE(0x1bc7, 0x0023), /* Telit 3G ACM + ECM composition */
+ .driver_info = SEND_ZERO_PACKET,
+ },
+
/* control interfaces without any protocol set */
{ USB_INTERFACE_INFO(USB_CLASS_COMM, USB_CDC_SUBCLASS_ACM,
USB_CDC_PROTO_NONE) },
--
2.7.4
