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authorDaniele Palmas <dnlplm@gmail.com>2018-12-28 18:15:41 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-01-07 19:23:29 +0300
commit34aabf918717dd14e05051896aaecd3b16b53d95 (patch)
tree51dda491bf181891127b8320ec9519a043f47a00 /drivers/usb/class/cdc-acm.c
parentbfeffd155283772bbe78c6a05dec7c0128ee500c (diff)
downloadlinux-34aabf918717dd14e05051896aaecd3b16b53d95.tar.xz
usb: cdc-acm: send ZLP for Telit 3G Intel based modems
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>
Diffstat (limited to 'drivers/usb/class/cdc-acm.c')
-rw-r--r--drivers/usb/class/cdc-acm.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/usb/class/cdc-acm.c b/drivers/usb/class/cdc-acm.c
index ed8c62b2d9d1..739f8960811a 100644
--- a/drivers/usb/class/cdc-acm.c
+++ b/drivers/usb/class/cdc-acm.c
@@ -1865,6 +1865,13 @@ 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) },