Commit cb82a549 authored by Leon Schuermann's avatar Leon Schuermann Committed by Jakub Kicinski
Browse files

r8152: Add Lenovo Powered USB-C Travel Hub 



This USB-C Hub (17ef:721e) based on the Realtek RTL8153B chip used to
use the cdc_ether driver. However, using this driver, with the system
suspended the device constantly sends pause-frames as soon as the
receive buffer fills up. This causes issues with other devices, where
some Ethernet switches stop forwarding packets altogether.

Using the Realtek driver (r8152) fixes this issue. Pause frames are no
longer sent while the host system is suspended.

Signed-off-by: default avatarLeon Schuermann <leon@is.currently.online>
Tested-by: default avatarLeon Schuermann <leon@is.currently.online>
Link: https://lore.kernel.org/r/20210111190312.12589-2-leon@is.currently.online


Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 91158e16

drivers/net/usb/cdc_ether.c

+7 −0
Original line number Diff line number Diff line
@@ -793,6 +793,13 @@ static const struct usb_device_id products[] = { 
	.driver_info = 0,

},



/* Lenovo Powered USB-C Travel Hub (4X90S92381, based on Realtek RTL8153) */

{

	USB_DEVICE_AND_INTERFACE_INFO(LENOVO_VENDOR_ID, 0x721e, USB_CLASS_COMM,

			USB_CDC_SUBCLASS_ETHERNET, USB_CDC_PROTO_NONE),

	.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,

drivers/net/usb/r8152.c

+1 −0
Original line number Diff line number Diff line
@@ -6877,6 +6877,7 @@ 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,  0x721e)},

	{REALTEK_USB_DEVICE(VENDOR_ID_LENOVO,  0xa387)},

	{REALTEK_USB_DEVICE(VENDOR_ID_LINKSYS, 0x0041)},

	{REALTEK_USB_DEVICE(VENDOR_ID_NVIDIA,  0x09ff)},