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IB/mlx5: Avoid load failure due to unknown link width 

If the firmware reports a connection width that is not 1x, 4x, 8x or 12x
it causes the driver to fail during initialization.

To prevent this failure every time a new width is introduced to the RDMA
stack, we will set a default 4x width for these widths which ar unknown to
the driver.

This is needed to allow to run old kernels with new firmware.

Cc: <stable@vger.kernel.org> # 4.1
Fixes: 1b5daf11b0 ("IB/mlx5: Avoid using the MAD_IFC command under ISSI > 0 mode")
Signed-off-by: Michael Guralnik <michaelgur@mellanox.com>
Reviewed-by: Majd Dibbiny <majd@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Michael Guralnik 2018-11-21 15:03:54 +02:00 committed by Jason Gunthorpe
parent 13f8d9c166
commit db7a691a15
1 changed files with 11 additions and 18 deletions
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29
drivers/infiniband/hw/mlx5/main.c
View File

@ -1094,31 +1094,26 @@ enum mlx5_ib_width {
MLX5_IB_WIDTH_12X = 1 << 4
};
static int translate_active_width(struct ib_device *ibdev, u8 active_width,
static void translate_active_width(struct ib_device *ibdev, u8 active_width,
u8 *ib_width)
{
struct mlx5_ib_dev *dev = to_mdev(ibdev);
int err = 0;
if (active_width & MLX5_IB_WIDTH_1X) {
if (active_width & MLX5_IB_WIDTH_1X)
*ib_width = IB_WIDTH_1X;
} else if (active_width & MLX5_IB_WIDTH_2X) {
mlx5_ib_dbg(dev, "active_width %d is not supported by IB spec\n",
(int)active_width);
err = -EINVAL;
} else if (active_width & MLX5_IB_WIDTH_4X) {
else if (active_width & MLX5_IB_WIDTH_4X)
*ib_width = IB_WIDTH_4X;
} else if (active_width & MLX5_IB_WIDTH_8X) {
else if (active_width & MLX5_IB_WIDTH_8X)
*ib_width = IB_WIDTH_8X;
} else if (active_width & MLX5_IB_WIDTH_12X) {
else if (active_width & MLX5_IB_WIDTH_12X)
*ib_width = IB_WIDTH_12X;
} else {
mlx5_ib_dbg(dev, "Invalid active_width %d\n",
else {
mlx5_ib_dbg(dev, "Invalid active_width %d, setting width to default value: 4x\n",
(int)active_width);
err = -EINVAL;
*ib_width = IB_WIDTH_4X;
}
return err;
return;
}
static int mlx5_mtu_to_ib_mtu(int mtu)
@ -1225,10 +1220,8 @@ static int mlx5_query_hca_port(struct ib_device *ibdev, u8 port,
if (err)
goto out;
err = translate_active_width(ibdev, ib_link_width_oper,
&props->active_width);
if (err)
goto out;
translate_active_width(ibdev, ib_link_width_oper, &props->active_width);
err = mlx5_query_port_ib_proto_oper(mdev, &props->active_speed, port);
if (err)
goto out;