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IB/mlx4: Don't return an invalid speed when a port is down

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When the IB port is down, the active_speed value returned by the
MAD_IFC command is seven (7) which isn't among the defined IB speeds
in enum ib_port_speed, and this invalid speed value is passed up to
higher layers or applications who do port query.

Fix that by setting the speed to be SDR -- the lowest possible -- when
the port is down.

Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Or Gerlitz 2012-04-02 17:45:20 +03:00 committed by Roland Dreier
parent dd775ae254
commit d2ef406866
1 changed files with 5 additions and 0 deletions
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5
drivers/infiniband/hw/mlx4/main.c
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@ -253,6 +253,11 @@ static int ib_link_query_port(struct ib_device *ibdev, u8 port,
if (out_mad->data[15] & 0x1)
props->active_speed = IB_SPEED_FDR10;
}
/* Avoid wrong speed value returned by FW if the IB link is down. */
if (props->state == IB_PORT_DOWN)
props->active_speed = IB_SPEED_SDR;
out:
kfree(in_mad);
kfree(out_mad);