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authorLeon Schuermann <leon@is.currently.online>2021-01-11 22:03:13 +0300
committerJakub Kicinski <kuba@kernel.org>2021-01-13 07:00:51 +0300
commitcb82a54904a99df9e8f9e9d282046055dae5a730 (patch)
tree242444e6d10d9a32ca5db06ee15a9faddc96ed13 /drivers/net/usb/cdc_ether.c
parent91158e1680b164c8d101144ca916a3dca10c3e17 (diff)
downloadlinux-cb82a54904a99df9e8f9e9d282046055dae5a730.tar.xz
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: 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>
Diffstat (limited to 'drivers/net/usb/cdc_ether.c')
-rw-r--r--drivers/net/usb/cdc_ether.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/net/usb/cdc_ether.c b/drivers/net/usb/cdc_ether.c
index 8c1d61c2cbac..6aaa0675c28a 100644
--- a/drivers/net/usb/cdc_ether.c
+++ b/drivers/net/usb/cdc_ether.c
@@ -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,