linux-kernel - [PATCH] Revert "net: usb: r8152: Add MAC passthrough support for more Lenovo Docks"

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Date:   Wed,  5 Jan 2022 23:51:02 +0800
From:   Aaron Ma <aaron.ma@...onical.com>
To:     aaron.ma@...onical.com, kuba@...nel.org,
        henning.schild@...mens.com, linux-usb@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Cc:     davem@...emloft.net, hayeswang@...ltek.com, tiwai@...e.de
Subject: [PATCH] Revert "net: usb: r8152: Add MAC passthrough support for more Lenovo Docks"

This reverts commit f77b83b5bbab53d2be339184838b19ed2c62c0a5.

This change breaks multiple usb to ethernet dongles attached on Lenovo
USB hub.

Signed-off-by: Aaron Ma <aaron.ma@...onical.com>
---
 drivers/net/usb/r8152.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index f9877a3e83ac..4a02f33f0643 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -9603,9 +9603,12 @@ static int rtl8152_probe(struct usb_interface *intf,
 		netdev->hw_features &= ~NETIF_F_RXCSUM;
 	}
 
-	if (udev->parent &&
-			le16_to_cpu(udev->parent->descriptor.idVendor) == VENDOR_ID_LENOVO) {
-		tp->lenovo_macpassthru = 1;
+	if (le16_to_cpu(udev->descriptor.idVendor) == VENDOR_ID_LENOVO) {
+		switch (le16_to_cpu(udev->descriptor.idProduct)) {
+		case DEVICE_ID_THINKPAD_THUNDERBOLT3_DOCK_GEN2:
+		case DEVICE_ID_THINKPAD_USB_C_DOCK_GEN2:
+			tp->lenovo_macpassthru = 1;
+		}
 	}
 
 	if (le16_to_cpu(udev->descriptor.bcdDevice) == 0x3011 && udev->serial &&
-- 
2.30.2