Re: mlx4: kernel 3.4-rc1 breaks libumad

[Or Gerlitz <ogerlitz-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>]

On 4/2/2012 4:35 PM, Bart Van Assche wrote:
>
> Some additional info:
> - This issue only occurs if the back-to-back connected system is down,
>    not if it is running.
> - The output I get with the other system down is:
>
> # cat /sys/class/infiniband/mlx4_0/ports/1/link_layer
> InfiniBand
> # dmesg -c>/dev/null
> # cat /sys/class/infiniband/mlx4_0/ports/1/rate
> cat: /sys/class/infiniband/mlx4_0/ports/1/rate: Invalid argument
> # dmesg -c
> ib_link_query_port active_speed 7
> rate_show ret 0 for ib_query_port dev mlx4_0 port 1 link 1
>

So you're getting the same wrong value of seven which I get on my 
systems, I think the patch / way to go here would be to assume some 
fixed speed (SDR?) when the link is down - as when the link is really 
down or down since the "wrong" link layer is assumed, the firmware 
command returns that value of seven which isn't in the speed enum, Roland?

Or.
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