linux-kernel - Re: [PATCH] Add Multiple TX/RX Queues Support for WWAN Network Device

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Date:   Thu, 16 Dec 2021 20:13:30 +0800
From:   Xiayu Zhang <xiayu.zhang@...iatek.com>
To:     Sergey Ryazanov <ryazanov.s.a@...il.com>
CC:     Loic Poulain <loic.poulain@...aro.org>,
        David Miller <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Johannes Berg <johannes@...solutions.net>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        "Haijun Liu (刘海军)" 
        <haijun.liu@...iatek.com>,
        Zhaoping Shu (舒召平) 
        <Zhaoping.Shu@...iatek.com>,
        HW He (何伟) <HW.He@...iatek.com>,
        srv_heupstream <srv_heupstream@...iatek.com>
Subject: Re: [PATCH] Add Multiple TX/RX Queues Support for WWAN Network
 Device

Hi Sergey and Loic,

Really thank you for these information.

It seems that I need to submit another patch for discussion.

At the meantime, I have some questions below and hope you could do me a
favor.

On Wed, 2021-12-15 at 22:16 +0800, Sergey Ryazanov wrote:

> There are two things that trigger the discussion:
> 1) absence of users of the new API;

Can I choose WWAN device simulator (wwan_hwsim.c) as the in-tree user
for these new APIs? And, Can I submit new APIs and changes for the user
driver in a single patch?

> 2) an attempt to silently correct a user choice instead of explicit
> rejection of a wrong value.

I will try to follow this:
   a. If user doesn't specify a number, use WWAN driver's default
   number.
   b. If user specifies an improper value, reject it explicitly.