| From 34aabf918717dd14e05051896aaecd3b16b53d95 Mon Sep 17 00:00:00 2001 |
| From: Daniele Palmas <dnlplm@gmail.com> |
| Date: Fri, 28 Dec 2018 16:15:41 +0100 |
| Subject: usb: cdc-acm: send ZLP for Telit 3G Intel based modems |
| |
| From: Daniele Palmas <dnlplm@gmail.com> |
| |
| commit 34aabf918717dd14e05051896aaecd3b16b53d95 upstream. |
| |
| 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@gmail.com> |
| Cc: stable <stable@vger.kernel.org> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| --- |
| drivers/usb/class/cdc-acm.c | 7 +++++++ |
| 1 file changed, 7 insertions(+) |
| |
| --- a/drivers/usb/class/cdc-acm.c |
| +++ b/drivers/usb/class/cdc-acm.c |
| @@ -1893,6 +1893,13 @@ static const struct usb_device_id acm_id |
| .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) }, |
