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

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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>

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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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drivers/infiniband/hw/mlx5/main.c

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