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

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Message-ID: <20aece10-1188-6672-bd44-e78c50396445@dev.mellanox.co.il>
Date:   Fri, 27 Oct 2017 16:18:46 -0400
From:   Hal Rosenstock <hal@....mellanox.co.il>
To:     Parav Pandit <parav@...lanox.com>,
        Thomas Bogendoerfer <tbogendoerfer@...e.de>,
        Matan Barak <matanb@...lanox.com>,
        Leon Romanovsky <leonro@...lanox.com>,
        Doug Ledford <dledford@...hat.com>,
        "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Cc:     Ghazale Hosseinabadi <ghazale.hosseinabadi@...cle.com>
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 ?

-- Hal