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r8152: Add Lenovo Powered USB-C Travel Hub 

commit cb82a54904a99df9e8f9e9d282046055dae5a730 upstream.

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: Leon Schuermann <leon@is.currently.online>
Tested-by: Leon Schuermann <leon@is.currently.online>
Link: https://lore.kernel.org/r/20210111190312.12589-2-leon@is.currently.online
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Leon Schuermann 2021-01-11 20:03:13 +01:00 committed by Greg Kroah-Hartman
parent ad5f19c7e9
commit 82a948fc67
2 changed files with 8 additions and 0 deletions
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7
drivers/net/usb/cdc_ether.c
View File

@ -787,6 +787,13 @@ 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,

1
drivers/net/usb/r8152.c
View File

@ -5845,6 +5845,7 @@ 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)},