linux-kernel - Re: [PATCH] IB/mlx5: give back valid speed/width even without plugged in SFP module

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Date:   Fri, 27 Oct 2017 13:35:13 -0700 (PDT)
From:   Ghazale Hosseinabadi <ghazale.hosseinabadi@...cle.com>
To:     <hal@....mellanox.co.il>
Cc:     <linux-rdma@...r.kernel.org>, <tbogendoerfer@...e.de>,
        <matanb@...lanox.com>, <leonro@...lanox.com>, <parav@...lanox.com>,
        <linux-kernel@...r.kernel.org>, <dledford@...hat.com>
Subject: Re: [PATCH] IB/mlx5: give back valid speed/width even without plugged
 in SFP module

Hi,

----- Original Message -----
From: hal@....mellanox.co.il
To: parav@...lanox.com, tbogendoerfer@...e.de, matanb@...lanox.com, leonro@...lanox.com, dledford@...hat.com, linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: ghazale.hosseinabadi@...cle.com
Sent: Friday, October 27, 2017 1:18:50 PM GMT -08:00 US/Canada Pacific
Subject: Re: [PATCH] IB/mlx5: give back valid speed/width even without plugged in SFP module

On 10/27/2017 2:32 PM, Parav Pandit wrote:
> However I believe that ibstat tool should be enhanced to report unknown port speed instead of expecting drivers to supply some random number like this.

ibstat gets the rate from libibumad via /sys/class/infiniband/<IB device>/ports/<port number>/rate file which is supposed to be populated by the driver. Is there no rate file in this error case ?

There is a rate file, but it is empty.

Thanks,
Ghazale

-- Hal