linux-kernel - [PATCH 5.8 396/464] r8152: Use MAC address from correct device tree node

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Date:   Mon, 17 Aug 2020 17:15:49 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, EJ Hsu <ejh@...dia.com>,
        Thierry Reding <treding@...dia.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 5.8 396/464] r8152: Use MAC address from correct device tree node

From: Thierry Reding <treding@...dia.com>

[ Upstream commit b9b40ee4db6cb186341b97bca4f0d7aa2a042a66 ]

Query the USB device's device tree node when looking for a MAC address.
The struct device embedded into the struct net_device does not have a
device tree node attached at all.

The reason why this went unnoticed is because the system where this was
tested was one of the few development units that had its OTP programmed,
as opposed to production systems where the MAC address is stored in a
separate EEPROM and is passed via device tree by the firmware.

Reported-by: EJ Hsu <ejh@...dia.com>
Fixes: acb6d3771a03 ("r8152: Use MAC address from device tree if available")
Signed-off-by: Thierry Reding <treding@...dia.com>
Reviewed-by: EJ Hsu <ejh@...dia.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/usb/r8152.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/net/usb/r8152.c
+++ b/drivers/net/usb/r8152.c
@@ -1504,7 +1504,7 @@ static int determine_ethernet_addr(struc
 
 	sa->sa_family = dev->type;
 
-	ret = eth_platform_get_mac_address(&dev->dev, sa->sa_data);
+	ret = eth_platform_get_mac_address(&tp->udev->dev, sa->sa_data);
 	if (ret < 0) {
 		if (tp->version == RTL_VER_01) {
 			ret = pla_ocp_read(tp, PLA_IDR, 8, sa->sa_data);