netdev - Re: [RFC 02/10] IB/hfi-vnic: Virtual Network Interface Controller (VNIC) Bus driver

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Message-ID: <20161122170407.GE3956@obsidianresearch.com>
Date:   Tue, 22 Nov 2016 10:04:07 -0700
From:   Jason Gunthorpe <jgunthorpe@...idianresearch.com>
To:     "Vishwanathapura, Niranjana" <niranjana.vishwanathapura@...el.com>
Cc:     Doug Ledford <dledford@...hat.com>, linux-rdma@...r.kernel.org,
        netdev@...r.kernel.org,
        Dennis Dalessandro <dennis.dalessandro@...el.com>
Subject: Re: [RFC 02/10] IB/hfi-vnic: Virtual Network Interface Controller
 (VNIC) Bus driver

On Mon, Nov 21, 2016 at 05:53:04PM -0800, Vishwanathapura, Niranjana wrote:
> There are many example drivers in kernel which are using bus_register() in
> an initcall.

There really are not, certainly not in major subsystems.

> We could add a custom Interface between HFI1 driver and hfi_vnic drivers
> without involving a bus.

hfi is already registering on the infiniband class, just use that.

> But using the existing bus model gave a lot of in-built flexibility in
> decoupling devices from the drivers.

If you want to have your own bus then you need your own hfi
subsystem. drivers/infiniband is not a dumping ground..

Jason