3.17-stable review patch. If anyone has any objections, please let me know.
------------------
From: Or Gerlitz <ogerl...@mellanox.com>
[ Upstream commit 9737c6ab7afbc950e997ef80cba2c40dbbd16ea4 ]
This is currently missing, which results in a crash when one attempts
to set VXLAN tunnel over the mlx4_en when acting as PF.
[ 2408.785472] BUG: unable to handle kernel NULL pointer dereference at
(null)
[...]
[ 2408.994104] Call Trace:
[ 2408.996584] [<ffffffffa021f7f5>] ? vxlan_get_rx_port+0xd6/0x103
[vxlan]
[ 2409.003316] [<ffffffffa021f71f>] ? vxlan_lowerdev_event+0xf2/0xf2
[vxlan]
[ 2409.010225] [<ffffffffa0630358>] mlx4_en_start_port+0x862/0x96a
[mlx4_en]
[ 2409.017132] [<ffffffffa063070f>] mlx4_en_open+0x17f/0x1b8 [mlx4_en]
While here, make sure to invoke vxlan_get_rx_port() only when VXLAN
offloads are actually enabled and not when they are only supported.
Reported-by: Ido Shamay <i...@mellanox.com>
Signed-off-by: Or Gerlitz <ogerl...@mellanox.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/net/ethernet/mellanox/mlx4/en_netdev.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
--- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
@@ -1693,7 +1693,7 @@ int mlx4_en_start_port(struct net_device
mlx4_set_stats_bitmap(mdev->dev, &priv->stats_bitmap);
#ifdef CONFIG_MLX4_EN_VXLAN
- if (priv->mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_VXLAN_OFFLOADS)
+ if (priv->mdev->dev->caps.tunnel_offload_mode ==
MLX4_TUNNEL_OFFLOAD_MODE_VXLAN)
vxlan_get_rx_port(dev);
#endif
priv->port_up = true;
@@ -2403,6 +2403,10 @@ static const struct net_device_ops mlx4_
.ndo_rx_flow_steer = mlx4_en_filter_rfs,
#endif
.ndo_get_phys_port_id = mlx4_en_get_phys_port_id,
+#ifdef CONFIG_MLX4_EN_VXLAN
+ .ndo_add_vxlan_port = mlx4_en_add_vxlan_port,
+ .ndo_del_vxlan_port = mlx4_en_del_vxlan_port,
+#endif
};
int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
--
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