IB/mlx5: Avoid load failure due to unknown link width
commit db7a691a1551a748cb92d9c89c6b190ea87e28d5 upstream. 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: 1b5daf11 ("IB/mlx5: Avoid using the MAD_IFC command under ISSI > 0 mode") Signed-off-by: NMichael Guralnik <michaelgur@mellanox.com> Reviewed-by: NMajd Dibbiny <majd@mellanox.com> Signed-off-by: NLeon Romanovsky <leonro@mellanox.com> Signed-off-by: NJason Gunthorpe <jgg@mellanox.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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