linux-kernel - Re: [PATCH RFC 2/2] IB/hfi1: Fix port ordering issue in a multiport device

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Message-ID: <20170206210425.GA2062@infradead.org>
Date:   Mon, 6 Feb 2017 13:04:25 -0800
From:   Christoph Hellwig <hch@...radead.org>
To:     Jason Gunthorpe <jgunthorpe@...idianresearch.com>
Cc:     Tadeusz Struk <tadeusz.struk@...el.com>,
        gregkh@...uxfoundation.org, linux-rdma@...r.kernel.org,
        dennis.dalessandro@...el.com, linux-kernel@...r.kernel.org,
        grant.likely@...retlab.ca, dledford@...hat.com, ira.weiny@...el.com
Subject: Re: [PATCH RFC 2/2] IB/hfi1: Fix port ordering issue in a multiport
 device

On Mon, Feb 06, 2017 at 12:26:42PM -0700, Jason Gunthorpe wrote:
> Still no on this from me, this is a horrible abuse of the device core.

Seconded.  Netdevice (and thus RDMA) devices names generated by the
kernel are not stable, period.  Use udev and the MAC / port GUID or
whatever the OFI equivalent is to generate stable device names.