linux-kernel - Re: [PATCH v2 0/2] Add MHI Endpoint network driver

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Message-ID: <20230607104350.03a51711@kernel.org>
Date:   Wed, 7 Jun 2023 10:43:50 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc:     davem@...emloft.net, edumazet@...gle.com, pabeni@...hat.com,
        mhi@...ts.linux.dev, linux-arm-msm@...r.kernel.org,
        netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        loic.poulain@...aro.org
Subject: Re: [PATCH v2 0/2] Add MHI Endpoint network driver

On Wed, 7 Jun 2023 22:41:53 +0530 Manivannan Sadhasivam wrote:
> > In any case, I'm opposed to reuse of the networking stack to talk
> > to firmware. It's a local device. The networking subsystem doesn't
> > have to cater to fake networks. Please carry:
> > 
> > Nacked-by: Jakub Kicinski <kuba@...nel.org>
> > 
> > if there are future submissions.  
> 
> Why shouldn't it be? With this kind of setup one could share the data connectivity
> available in the device with the host over IP tunneling. If the IP source in the
> device (like modem DSP) has no way to be shared with the host, then those IP
> packets could be tunneled through this interface for providing connectivity to
> the host.
> 
> I believe this is a common usecase among the PCIe based wireless endpoint
> devices.

We can handwave our way into many scenarios and terrible architectures.
I don't see any compelling reason to merge this.