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IB/mlx4: Do IBoE locking earlier when initializing the GID table

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Updating the GID table under IBoE requires read/write from/to shared
data structures.  These data structures are protected with the device
iboe lock.  The flows that modify the GID table start from

    1. Initializing the GID table
    2. NETDEV events
    3. INET or INET6 events

This patch makes sure that the flow of initializing the GID table is
consistent with the other two flows w.r.t on what step the lock is taken.

Signed-off-by: Moni Shoua <monis@mellanox.co.il>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Moni Shoua 2014-02-05 15:13:00 +02:00 • committed by Roland Dreier
commit ddf8bd3491
1 changed files with 3 additions and 3 deletions
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6
drivers/infiniband/hw/mlx4/main.c
View file

@ -1570,7 +1570,6 @@ static u8 mlx4_ib_get_dev_port(struct net_device *dev,
rdma_vlan_dev_real_dev(dev) : dev;
iboe = &ibdev->iboe;
spin_lock(&iboe->lock);
for (port = 1; port <= MLX4_MAX_PORTS; ++port)
if ((netif_is_bond_master(real_dev) &&
@ -1579,8 +1578,6 @@ static u8 mlx4_ib_get_dev_port(struct net_device *dev,
(real_dev == iboe->netdevs[port - 1])))
break;
spin_unlock(&iboe->lock);
if ((port == 0) || (port > MLX4_MAX_PORTS))
return 0;
else
@ -1672,11 +1669,13 @@ static void mlx4_ib_set_default_gid(struct mlx4_ib_dev *ibdev,
static int mlx4_ib_init_gid_table(struct mlx4_ib_dev *ibdev)
{
struct net_device *dev;
struct mlx4_ib_iboe *iboe = &ibdev->iboe;
if (reset_gid_table(ibdev))
return -1;
read_lock(&dev_base_lock);
spin_lock(&iboe->lock);
for_each_netdev(&init_net, dev) {
u8 port = mlx4_ib_get_dev_port(dev, ibdev);
@ -1684,6 +1683,7 @@ static int mlx4_ib_init_gid_table(struct mlx4_ib_dev *ibdev)
mlx4_ib_get_dev_addr(dev, ibdev, port);
}
spin_unlock(&iboe->lock);
read_unlock(&dev_base_lock);
return 0;