netdev - [PATCH] r8152: add device id for Lenovo ThinkPad USB-C Dock Gen 2

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Message-Id: <20191020150306.11902-1-noguchi.kazutosi@gmail.com>
Date:   Mon, 21 Oct 2019 00:03:07 +0900
From:   Kazutoshi Noguchi <noguchi.kazutosi@...il.com>
To:     linux-kernel@...r.kernel.org
Cc:     "David S. Miller" <davem@...emloft.net>, linux-usb@...r.kernel.org,
        netdev@...r.kernel.org, noguchi.kazutosi@...il.com
Subject: [PATCH] r8152: add device id for Lenovo ThinkPad USB-C Dock Gen 2

This device is sold as 'ThinkPad USB-C Dock Gen 2 (40AS)'.
Chipset is RTL8153 and works with r8152.
Without this, the generic cdc_ether grabs the device, and the device jam
connected networks up when the machine suspends.

Signed-off-by: Kazutoshi Noguchi <noguchi.kazutosi@...il.com>
---
 drivers/net/usb/cdc_ether.c | 7 +++++++
 drivers/net/usb/r8152.c     | 1 +
 2 files changed, 8 insertions(+)

diff --git a/drivers/net/usb/cdc_ether.c b/drivers/net/usb/cdc_ether.c
index 32f53de5b1fe..fe630438f67b 100644
--- a/drivers/net/usb/cdc_ether.c
+++ b/drivers/net/usb/cdc_ether.c
@@ -787,6 +787,13 @@ static const struct usb_device_id	products[] = {
 	.driver_info = 0,
 },
 
+/* ThinkPad USB-C Dock Gen 2 (based on Realtek RTL8153) */
+{
+	USB_DEVICE_AND_INTERFACE_INFO(LENOVO_VENDOR_ID, 0xa387, USB_CLASS_COMM,
+			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),
+	.driver_info = 0,
+},
+
 /* NVIDIA Tegra USB 3.0 Ethernet Adapters (based on Realtek RTL8153) */
 {
 	USB_DEVICE_AND_INTERFACE_INFO(NVIDIA_VENDOR_ID, 0x09ff, USB_CLASS_COMM,
diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index cee9fef925cd..d4a95b50bda6 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -5755,6 +5755,7 @@ static const struct usb_device_id rtl8152_table[] = {
 	{REALTEK_USB_DEVICE(VENDOR_ID_LENOVO,  0x7205)},
 	{REALTEK_USB_DEVICE(VENDOR_ID_LENOVO,  0x720c)},
 	{REALTEK_USB_DEVICE(VENDOR_ID_LENOVO,  0x7214)},
+	{REALTEK_USB_DEVICE(VENDOR_ID_LENOVO,  0xa387)},
 	{REALTEK_USB_DEVICE(VENDOR_ID_LINKSYS, 0x0041)},
 	{REALTEK_USB_DEVICE(VENDOR_ID_NVIDIA,  0x09ff)},
 	{REALTEK_USB_DEVICE(VENDOR_ID_TPLINK,  0x0601)},
-- 
2.20.1