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net/mlx4_core: fix handling return value of mlx4_slave_convert_port 

The function can return negative values, so its result should
be assigned to signed variable.

The problem has been detected using proposed semantic patch
scripts/coccinelle/tests/assign_signed_to_unsigned.cocci [1].

[1]: http://permalink.gmane.org/gmane.linux.kernel/2046107

Fixes: fc48866f7 ('net/mlx4: Adapt code for N-Port VF')
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Acked-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Andrzej Hajda 2015-12-14 11:05:58 +01:00 committed by David S. Miller
parent f654861569
commit 2b2b31c845
1 changed files with 3 additions and 2 deletions
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5
drivers/net/ethernet/mellanox/mlx4/resource_tracker.c
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@ -4306,9 +4306,10 @@ int mlx4_QP_FLOW_STEERING_ATTACH_wrapper(struct mlx4_dev *dev, int slave,
return -EOPNOTSUPP;
ctrl = (struct mlx4_net_trans_rule_hw_ctrl *)inbox->buf;
ctrl->port = mlx4_slave_convert_port(dev, slave, ctrl->port);
if (ctrl->port <= 0)
err = mlx4_slave_convert_port(dev, slave, ctrl->port);
if (err <= 0)
return -EINVAL;
ctrl->port = err;
qpn = be32_to_cpu(ctrl->qpn) & 0xffffff;
err = get_res(dev, slave, qpn, RES_QP, &rqp);
if (err) {