IB/ipoib: Ensure that MTU isn't less than minimum permitted

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It is illegal to change MTU to a value lower than the minimum MTU
stated in ethernet spec. In addition to that we need to add 4 bytes
for encapsulation header (IPOIB_ENCAP_LEN).

Before "ifconfig ib0 mtu 0" command, succeeds while it obviously shouldn't.

Signed-off-by: Muhammad Sammar <muhammads@mellanox.com>
Reviewed-by: Feras Daoud <ferasda@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

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Muhammad Sammar 2018-08-28 14:45:30 +03:00 • committed by Jason Gunthorpe

parent 6c75520f7e

commit 142a9c2876

1 changed files with 2 additions and 1 deletions

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drivers/infiniband/ulp/ipoib/ipoib_main.c

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