linux-kernel - Re: [PATCH 2/3] mwifiex: add allow_ps

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Message-ID: <CA+ASDXMXoyOr9oHBjtXZ1w9XxDggv+=XS4nwn0qKWCHQ3kybdw@mail.gmail.com>
Date:   Wed, 28 Oct 2020 15:04:55 -0700
From:   Brian Norris <briannorris@...omium.org>
To:     Tsuchiya Yuto <kitakar@...il.com>
Cc:     Amitkumar Karwar <amitkarwar@...il.com>,
        Ganapathi Bhat <ganapathi.bhat@....com>,
        Xinming Hu <huxinming820@...il.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        "David S. Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        linux-wireless <linux-wireless@...r.kernel.org>,
        "<netdev@...r.kernel.org>" <netdev@...r.kernel.org>,
        Linux Kernel <linux-kernel@...r.kernel.org>,
        Maximilian Luz <luzmaximilian@...il.com>,
        Andy Shevchenko <andriy.shevchenko@...el.com>, verdre@...d.nl
Subject: Re: [PATCH 2/3] mwifiex: add allow_ps_mode module parameter

On Wed, Oct 28, 2020 at 2:56 PM Tsuchiya Yuto <kitakar@...il.com> wrote:
>
> To make the ps_mode (power_save) control easier, this commit adds a new
> module parameter allow_ps_mode and set it false (disallowed) by default.

This sounds like a bad idea, as it breaks all the existing users who
expect this feature to be allowed. Seems like you should flip the
defaults. Without some better justification, NACK.

Also, I can't find the other 2 patches in this alleged series. Maybe
they're still making it through the mailing lists and archives.

Brian

> When this parameter is set to false, changing the power_save mode will
> be disallowed like the following:
>
>     $ sudo iw dev mlan0 set power_save on
>     command failed: Operation not permitted (-1)
>
> Signed-off-by: Tsuchiya Yuto <kitakar@...il.com>