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Date:   Tue, 8 Dec 2020 21:16:03 +0200
From:   Leon Romanovsky <leon@...nel.org>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc:     Jeffrey Hugo <jhugo@...eaurora.org>,
        Jakub Kicinski <kuba@...nel.org>,
        Hemant Kumar <hemantk@...eaurora.org>,
        gregkh@...uxfoundation.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org, bbhatt@...eaurora.org,
        loic.poulain@...aro.org, netdev@...r.kernel.org,
        linux-wireless@...r.kernel.org, Kalle Valo <kvalo@...eaurora.org>
Subject: Re: [PATCH v13 0/4] userspace MHI client interface driver

On Tue, Dec 08, 2020 at 10:29:27PM +0530, Manivannan Sadhasivam wrote:
> On Sun, Dec 06, 2020 at 10:33:02AM +0200, Leon Romanovsky wrote:
> > On Tue, Dec 01, 2020 at 09:59:53PM -0700, Jeffrey Hugo wrote:
> > > On 12/1/2020 7:55 PM, Jakub Kicinski wrote:
> > > > On Tue, 1 Dec 2020 13:48:36 -0700 Jeffrey Hugo wrote:
> > > > > On 12/1/2020 1:03 PM, Jakub Kicinski wrote:
> > > > > > On Tue, 1 Dec 2020 12:40:50 -0700 Jeffrey Hugo wrote:
> > > > > > > On 12/1/2020 12:29 PM, Jakub Kicinski wrote:
> > > > > > > > On Fri, 27 Nov 2020 19:26:02 -0800 Hemant Kumar wrote:
> > > > > > > > > This patch series adds support for UCI driver. UCI driver enables userspace
> > > > > > > > > clients to communicate to external MHI devices like modem and WLAN. UCI driver
> > > > > > > > > probe creates standard character device file nodes for userspace clients to
> > > > > > > > > perform open, read, write, poll and release file operations. These file
> > > > > > > > > operations call MHI core layer APIs to perform data transfer using MHI bus
> > > > > > > > > to communicate with MHI device. Patch is tested using arm64 based platform.
> > > > > > > >
> > > > > > > > Wait, I thought this was for modems.
> > > > > > > >
>
> [...]
>
> > Like it or not, but Jakub is absolutely right with his claim that
> > providing user-visible interfaces without any standardization is proven
> > as wrong.
> >
>
> Everybody agrees with standardizing things but the problem is, the
> standardization will only happen when more than one person implements the
> same functionality.

>From my experience in RDMA and netdev, I can't agree with both of your
statements. There are a lot of people who see standardization as a bad
thing. Also we are pushing even one person to make user visible interfaces
right from the beginning without relation to how wide it will be adopted
later.

Thanks

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