netdev - Re: [PATCH 04/24] rtw89: add debug files

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Date:   Fri, 2 Jul 2021 19:57:40 +0200
From:   Oleksij Rempel <o.rempel@...gutronix.de>
To:     Brian Norris <briannorris@...omium.org>
Cc:     Ping-Ke Shih <pkshih@...ltek.com>,
        Kalle Valo <kvalo@...eaurora.org>,
        linux-wireless <linux-wireless@...r.kernel.org>,
        netdev@...r.kernel.org, kernel@...gutronix.de
Subject: Re: [PATCH 04/24] rtw89: add debug files

On Fri, Jul 02, 2021 at 10:08:53AM -0700, Brian Norris wrote:
> On Fri, Jul 2, 2021 at 12:23 AM Oleksij Rempel <o.rempel@...gutronix.de> wrote:
> > On Fri, Jun 18, 2021 at 02:46:05PM +0800, Ping-Ke Shih wrote:
> > > +#ifdef CONFIG_RTW89_DEBUGMSG
> > > +unsigned int rtw89_debug_mask;
> > > +EXPORT_SYMBOL(rtw89_debug_mask);
> > > +module_param_named(debug_mask, rtw89_debug_mask, uint, 0644);
> > > +MODULE_PARM_DESC(debug_mask, "Debugging mask");
> > > +#endif
> >
> >
> > For dynamic debugging we usually use ethtool msglvl.
> > Please, convert all dev_err/warn/inf.... to netif_ counterparts
> 
> Have you ever looked at a WiFi driver?

Yes. You can parse the kernel log for my commits.

> I haven't seen a single one that uses netif_*() for logging.
> On the other hand, almost every
> single one has a similar module parameter or debugfs knob for enabling
> different types of debug messages.
> 
> As it stands, the NETIF_* categories don't really align at all with
> the kinds of message categories most WiFi drivers support. Do you
> propose adding a bunch of new options to the netif debug feature?

Why not? It make no sense or it is just "it is tradition, we never do
it!" ? 

Even dynamic printk provide even more granularity. So module parameter looks
like stone age against all existing possibilities.

Regards,
Oleksij
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