commit 0d256c0e93916f416f46d2ec235ea05fca202ede
author Hadar Hen Zion <hadarh@mellanox.com> Wed Jan 30 23:07:08 2013 +0000
committer David S. Miller <davem@davemloft.net> Thu Jan 31 12:48:47 2013 -0500
tree 64c3883ddcdce138d7371e5af98d081c3a7197e6
parent 280fce1e3ef85ff7f90a9d7e8c8a0d71bbf5a9a4

net/mlx4_en: Fix ethtool rules leftovers after module unloaded

As part of the driver unload flow, all steering rules must be deleted,
make sure to remove the rules that were set through ethtool.

Signed-off-by: Hadar Hen Zion <hadarh@mellanox.com>
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mellanox/mlx4/en_ethtool.c

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
index 6f8044d..738e95d 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
@@ -915,6 +915,7 @@
 		loc_rule->id = 0;
 		memset(&loc_rule->flow_spec, 0,
 		       sizeof(struct ethtool_rx_flow_spec));
+		list_del(&loc_rule->list);
 	}
 	err = mlx4_flow_attach(priv->mdev->dev, &rule, &reg_id);
 	if (err) {
@@ -925,6 +926,7 @@
 	loc_rule->id = reg_id;
 	memcpy(&loc_rule->flow_spec, &cmd->fs,
 	       sizeof(struct ethtool_rx_flow_spec));
+	list_add_tail(&loc_rule->list, &priv->ethtool_list);
 
 out_free_list:
 	list_for_each_entry_safe(spec, tmp_spec, &rule.list, list) {
@@ -958,6 +960,7 @@
 	}
 	rule->id = 0;
 	memset(&rule->flow_spec, 0, sizeof(struct ethtool_rx_flow_spec));
+	list_del(&rule->list);
 out:
 	return err;
 

drivers/net/ethernet/mellanox/mlx4/en_netdev.c

diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
index 9c42812..333a7a0 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
@@ -1039,6 +1039,9 @@
 
 	INIT_LIST_HEAD(&priv->mc_list);
 	INIT_LIST_HEAD(&priv->curr_list);
+	INIT_LIST_HEAD(&priv->ethtool_list);
+	memset(&priv->ethtool_rules[0], 0,
+	       sizeof(struct ethtool_flow_id) * MAX_NUM_OF_FS_RULES);
 
 	/* Calculate Rx buf size */
 	dev->mtu = min(dev->mtu, priv->max_mtu);
@@ -1202,6 +1205,7 @@
 	struct mlx4_en_priv *priv = netdev_priv(dev);
 	struct mlx4_en_dev *mdev = priv->mdev;
 	struct mlx4_en_mc_list *mclist, *tmp;
+	struct ethtool_flow_id *flow, *tmp_flow;
 	int i;
 	u8 mc_list[16] = {0};
 
@@ -1283,6 +1287,17 @@
 	mlx4_put_eth_qp(mdev->dev, priv->port, priv->mac, priv->base_qpn);
 	mdev->mac_removed[priv->port] = 1;
 
+	/* Remove flow steering rules for the port*/
+	if (mdev->dev->caps.steering_mode ==
+	    MLX4_STEERING_MODE_DEVICE_MANAGED) {
+		ASSERT_RTNL();
+		list_for_each_entry_safe(flow, tmp_flow,
+					 &priv->ethtool_list, list) {
+			mlx4_flow_detach(mdev->dev, flow->id);
+			list_del(&flow->list);
+		}
+	}
+
 	/* Free RX Rings */
 	for (i = 0; i < priv->rx_ring_num; i++) {
 		mlx4_en_deactivate_rx_ring(priv, &priv->rx_ring[i]);

drivers/net/ethernet/mellanox/mlx4/mlx4_en.h

diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
index 8d54412..4fb4a3e 100644
--- a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
+++ b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
@@ -427,6 +427,7 @@
 #endif
 
 struct ethtool_flow_id {
+	struct list_head list;
 	struct ethtool_rx_flow_spec flow_spec;
 	u64 id;
 };
@@ -441,6 +442,8 @@
 	struct mlx4_en_port_state port_state;
 	spinlock_t stats_lock;
 	struct ethtool_flow_id ethtool_rules[MAX_NUM_OF_FS_RULES];
+	/* To allow rules removal while port is going down */
+	struct list_head ethtool_list;
 
 	unsigned long last_moder_packets[MAX_RX_RINGS];
 	unsigned long last_moder_tx_packets;