linux-kernel - Re: [PATCH 3/5] staging: r8188eu: (trivial) remove a duplicate debug print

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Date:   Fri, 13 Aug 2021 14:42:53 +0200
From:   "Fabio M. De Francesco" <fmdefrancesco@...il.com>
To:     Martin Kaiser <martin@...ser.cx>
Cc:     Dan Carpenter <dan.carpenter@...cle.com>,
        Phillip Potter <phil@...lpotter.co.uk>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Larry Finger <Larry.Finger@...inger.net>,
        Michael Straube <straube.linux@...il.com>,
        linux-staging@...ts.linux.dev,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/5] staging: r8188eu: (trivial) remove a duplicate debug print

On Friday, August 13, 2021 12:05:36 PM CEST Martin Kaiser wrote:
> Hi Dan and Phil,
> 
> Thus wrote Dan Carpenter (dan.carpenter@...cle.com):
> > Please think of the subject and the commit message as two different
> > things.  Often it's people reviewing on email will only read one or the
> 
> > other.  In other words just restate the subject:
> OK, I'll keep that in mind for further patches.
> 
> > > Dear Martin,
> > > 
> > > Just my personal opinion, but I'd be inclined to strip out all DBG_88E
> > > calls totally. If there are necessary functions being called such as
> > > device_may_wakeup() we can always just keep this part and remove the
> > > macro call (not checked this function out myself yet). Thanks.
> 
> I'd agree with you, Phil. Most DBG_88E prints don't say anything useful.
> 
> This comment from Greg made me drop the DBG_88E removal for now
> 
> https://lore.kernel.org/linux-staging/20210803201511.29000-1-martin@kaiser.cx/T/#m05d82a
> 0ca8ed36180ebdc987114b4d892445c52d
> 
Hi Martin,

I think you misunderstood what Greg was trying to convey with the above-
mentioned message.

Well, he doesn't like to feed developers with little spoons :-)

I'm pretty sure that, by "Why not use the proper debugging calls instead of 
just deleting them?", he meant you should research, understand, and use the 
proper APIs for printing debug messages.

Please check out pr_debug(), dev_dbg(), netdev_dbg(). Use them appropriately, 
according to the subsystem you're working in and to the different types of 
arguments they take.

Thanks,

Fabio
>
> A compromise would be to remove only those DBG_88E prints which are
> really not helpful.
> 
> Best regards,
> Martin