netdev - [PATCH net-next] stmmac: fix changing mac address

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Message-Id: <20230417192903.590077-1-vinschen@redhat.com>
Date:   Mon, 17 Apr 2023 21:29:03 +0200
From:   Corinna Vinschen <vinschen@...hat.com>
To:     netdev@...r.kernel.org,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        alexandre.torgue@...s.st.com, Jose Abreu <joabreu@...opsys.com>,
        Jakub Kicinski <kuba@...nel.org>
Subject: [PATCH net-next] stmmac: fix changing mac address

Without the IFF_LIVE_ADDR_CHANGE flag being set, the network code
disallows changing the mac address while the interface is UP.

Consequences are, for instance, that the interface can't be used
in a failover bond.

Add the missing flag to net_device priv_flags.

Tested on Intel Elkhart Lake with default settings, as well as with
failover and alb mode bonds.

Signed-off-by: Corinna Vinschen <vinschen@...hat.com>
---
 drivers/net/ethernet/stmicro/stmmac/stmmac_main.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 8ab67c020a08..02d0bf70c528 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -7279,6 +7279,8 @@ int stmmac_dvr_probe(struct device *device,
 	if (flow_ctrl)
 		priv->flow_ctrl = FLOW_AUTO;	/* RX/TX pause on */
 
+	ndev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
+
 	/* Setup channels NAPI */
 	stmmac_napi_add(ndev);
 
-- 
2.31.1