[SRU][I/J/OEM-5.13/OEM-5.14][PATCH 1/1] net: usb: r8152: Add MAC passthrough support for more Lenovo Docks

[Aaron Ma]

BugLink: https://bugs.launchpad.net/bugs/1951767

Like ThinkaPad Thunderbolt 4 Dock, more Lenovo docks start to use the original
Realtek USB ethernet chip ID 0bda:8153.

Lenovo Docks always use their own IDs for usb hub, even for older Docks.
If parent hub is from Lenovo, then r8152 should try MAC passthrough.
Verified on Lenovo TBT3 dock too.

Signed-off-by: Aaron Ma <aaron.ma at canonical.com>
Signed-off-by: David S. Miller <davem at davemloft.net>
(cherry picked from commit f77b83b5bbab53d2be339184838b19ed2c62c0a5)
Signed-off-by: Aaron Ma <aaron.ma at canonical.com>
---
 drivers/net/usb/r8152.c | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/drivers/net/usb/r8152.c b/drivers/net/usb/r8152.c
index 92fca5e9ed03..65320bdcbd25 100644
--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -9599,12 +9599,9 @@ static int rtl8152_probe(struct usb_interface *intf,
 		netdev->hw_features &= ~NETIF_F_RXCSUM;
 	}
 
-	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 (udev->parent &&
+			le16_to_cpu(udev->parent->descriptor.idVendor) == VENDOR_ID_LENOVO) {
+		tp->lenovo_macpassthru = 1;
 	}
 
 	if (le16_to_cpu(udev->descriptor.bcdDevice) == 0x3011 && udev->serial &&
-- 
2.34.0