linux-kernel - [PATCH stable 6.1 3/4] net: bcmgenet: synchronize use of bcmgenet_set_rx

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Date: Wed, 15 May 2024 10:02:26 -0700
From: Florian Fainelli <florian.fainelli@...adcom.com>
To: linux-kernel@...r.kernel.org
Cc: broonie@...nel.org,
	Doug Berger <opendmb@...il.com>,
	stable@...r.kernel.org,
	Florian Fainelli <florian.fainelli@...adcom.com>,
	"David S . Miller" <davem@...emloft.net>,
	Florian Fainelli <f.fainelli@...il.com>,
	Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	netdev@...r.kernel.org (open list:BROADCOM GENET ETHERNET DRIVER),
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Sasha Levin <sashal@...nel.org>
Subject: [PATCH stable 6.1 3/4] net: bcmgenet: synchronize use of bcmgenet_set_rx_mode()

From: Doug Berger <opendmb@...il.com>

commit 2dbe5f19368caae63b1f59f5bc2af78c7d522b3a upstream

The ndo_set_rx_mode function is synchronized with the
netif_addr_lock spinlock and BHs disabled. Since this
function is also invoked directly from the driver the
same synchronization should be applied.

Fixes: 72f96347628e ("net: bcmgenet: set Rx mode before starting netif")
Cc: stable@...r.kernel.org
Signed-off-by: Doug Berger <opendmb@...il.com>
Acked-by: Florian Fainelli <florian.fainelli@...adcom.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Florian Fainelli <florian.fainelli@...adcom.com>
---
 drivers/net/ethernet/broadcom/genet/bcmgenet.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/broadcom/genet/bcmgenet.c b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
index c2a991308215..17cf89922ef6 100644
--- a/drivers/net/ethernet/broadcom/genet/bcmgenet.c
+++ b/drivers/net/ethernet/broadcom/genet/bcmgenet.c
@@ -2,7 +2,7 @@
 /*
  * Broadcom GENET (Gigabit Ethernet) controller driver
  *
- * Copyright (c) 2014-2020 Broadcom
+ * Copyright (c) 2014-2024 Broadcom
  */
 
 #define pr_fmt(fmt)				"bcmgenet: " fmt
@@ -3344,7 +3344,9 @@ static void bcmgenet_netif_start(struct net_device *dev)
 	struct bcmgenet_priv *priv = netdev_priv(dev);
 
 	/* Start the network engine */
+	netif_addr_lock_bh(dev);
 	bcmgenet_set_rx_mode(dev);
+	netif_addr_unlock_bh(dev);
 	bcmgenet_enable_rx_napi(priv);
 
 	umac_enable_set(priv, CMD_TX_EN | CMD_RX_EN, true);
-- 
2.34.1