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net/mlx4_core: Check port out-of-range before using in mlx4_slave_cap 

The range check was performed after using the port number.

Reverse this to prevent a potential array overflow.

Signed-off-by: Jack Morgenstein <jackm@dev.mellanox.co.il>
Reviewed-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jack Morgenstein 2012-05-30 09:14:54 +00:00 committed by David S. Miller
parent b91cb3ebcd
commit 6230bb234d
1 changed files with 3 additions and 3 deletions
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6
drivers/net/ethernet/mellanox/mlx4/main.c
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@ -485,15 +485,15 @@ static int mlx4_slave_cap(struct mlx4_dev *dev)
dev->caps.num_mgms = 0; dev->caps.num_mgms = 0;
dev->caps.num_amgms = 0; dev->caps.num_amgms = 0;
for (i = 1; i <= dev->caps.num_ports; ++i)
dev->caps.port_mask[i] = dev->caps.port_type[i];
if (dev->caps.num_ports > MLX4_MAX_PORTS) { if (dev->caps.num_ports > MLX4_MAX_PORTS) {
mlx4_err(dev, "HCA has %d ports, but we only support %d, " mlx4_err(dev, "HCA has %d ports, but we only support %d, "
"aborting.\n", dev->caps.num_ports, MLX4_MAX_PORTS); "aborting.\n", dev->caps.num_ports, MLX4_MAX_PORTS);
return -ENODEV; return -ENODEV;
} }
for (i = 1; i <= dev->caps.num_ports; ++i)
dev->caps.port_mask[i] = dev->caps.port_type[i];
if (dev->caps.uar_page_size * (dev->caps.num_uars - if (dev->caps.uar_page_size * (dev->caps.num_uars -
dev->caps.reserved_uars) > dev->caps.reserved_uars) >
pci_resource_len(dev->pdev, 2)) { pci_resource_len(dev->pdev, 2)) {