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 <[email protected]> --- 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
