3.16.60-rc1 review patch. If anyone has any objections, please let me know.
------------------ From: Danit Goldberg <[email protected]> commit 4f32ac2e452c2180cd2df581cbadac183e27ecd0 upstream. Before the change, if the user passed a static rate value different than zero and the FW doesn't support static rate, it would end up configuring rate of 2.5 GBps. Fix this by using rate 0; unlimited, in cases where FW doesn't support static rate configuration. Fixes: e126ba97dba9 ("mlx5: Add driver for Mellanox Connect-IB adapters") Reviewed-by: Majd Dibbiny <[email protected]> Signed-off-by: Danit Goldberg <[email protected]> Signed-off-by: Leon Romanovsky <[email protected]> Signed-off-by: Doug Ledford <[email protected]> [bwh: Backported to 3.16: adjust context] Signed-off-by: Ben Hutchings <[email protected]> --- drivers/infiniband/hw/mlx5/qp.c | 18 +++++++++--------- 1 file changed, 9 insertions(+), 9 deletions(-) --- a/drivers/infiniband/hw/mlx5/qp.c +++ b/drivers/infiniband/hw/mlx5/qp.c @@ -1285,18 +1285,18 @@ enum { static int ib_rate_to_mlx5(struct mlx5_ib_dev *dev, u8 rate) { - if (rate == IB_RATE_PORT_CURRENT) { + if (rate == IB_RATE_PORT_CURRENT) return 0; - } else if (rate < IB_RATE_2_5_GBPS || rate > IB_RATE_300_GBPS) { + + if (rate < IB_RATE_2_5_GBPS || rate > IB_RATE_300_GBPS) return -EINVAL; - } else { - while (rate != IB_RATE_2_5_GBPS && - !(1 << (rate + MLX5_STAT_RATE_OFFSET) & - dev->mdev.caps.stat_rate_support)) - --rate; - } - return rate + MLX5_STAT_RATE_OFFSET; + while (rate != IB_RATE_PORT_CURRENT && + !(1 << (rate + MLX5_STAT_RATE_OFFSET) & + dev->mdev.caps.stat_rate_support)) + --rate; + + return rate ? rate + MLX5_STAT_RATE_OFFSET : rate; } static int mlx5_set_path(struct mlx5_ib_dev *dev, const struct ib_ah_attr *ah,
