Re: [PATCH net 10/10] microchip: lan865x: move setting of netops to fix crash
flat view
From: Maxime Chevallier <maxime.chevallier@bootlin.com>
Date: 2026-10-08 08:32:32
Also in:
lkml
On 10/8/26 04:26, David Yang wrote:
lan865x_probe() assigns netdev_ops only after oa_tc6_init(), which
connects the internal MAC-PHY through phy_connect_direct().
phy_attach_direct() -> phy_link_topo_add_phy() reads dev->netdev_ops
through netdev_need_ops_lock() since the commit in question, so probing
crashes with a NULL pointer dereference when CONFIG_NET_SHAPER is
enabled.
Assign netdev_ops before the PHY attach, as was done for emac in commit
7c9f391ec89c ("net: emac: move setting of netops to fix crash").
Fixes: ded86da4bbb7 ("net: ethtool: relax ethnl_req_get_phydev() locking assertion")
Signed-off-by: David Yang <mmyangfl@gmail.com>Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com> Thanks, Maxime
quoted hunk ↗ jump to hunk
--- drivers/net/ethernet/microchip/lan865x/lan865x.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)diff --git a/drivers/net/ethernet/microchip/lan865x/lan865x.c b/drivers/net/ethernet/microchip/lan865x/lan865x.c index 26a2761332a5..633d00857774 100644 --- a/drivers/net/ethernet/microchip/lan865x/lan865x.c +++ b/drivers/net/ethernet/microchip/lan865x/lan865x.c@@ -346,6 +346,8 @@ static int lan865x_probe(struct spi_device *spi) spi_set_drvdata(spi, priv); INIT_WORK(&priv->multicast_work, lan865x_multicast_work_handler); + netdev->netdev_ops = &lan865x_netdev_ops; + priv->tc6 = oa_tc6_init(spi, netdev, NULL); if (!priv->tc6) { ret = -ENODEV;@@ -397,7 +399,6 @@ static int lan865x_probe(struct spi_device *spi) netdev->if_port = IF_PORT_10BASET; netdev->irq = spi->irq; - netdev->netdev_ops = &lan865x_netdev_ops; netdev->ethtool_ops = &lan865x_ethtool_ops; ret = register_netdev(netdev);