linux-kernel - Re: [PATCH 03/40] staging: rtl8723bs: replace RT_TRACE with public printk wrappers in core/rtw

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Date:   Wed, 31 Mar 2021 13:14:18 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Fabio Aiuto <fabioaiuto83@...il.com>
Cc:     dan.carpenter@...cle.com, joe@...ches.com,
        linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 03/40] staging: rtl8723bs: replace RT_TRACE with public
 printk wrappers in core/rtw_eeprom.c

On Wed, Mar 31, 2021 at 12:55:51PM +0200, Fabio Aiuto wrote:
> On Wed, Mar 31, 2021 at 12:27:20PM +0200, Greg KH wrote:
> > On Wed, Mar 31, 2021 at 11:39:31AM +0200, Fabio Aiuto wrote:
> > > replace private macro RT_TRACE for tracing with in-kernel
> > > pr_* printk wrappers
> > > 
> > > Signed-off-by: Fabio Aiuto <fabioaiuto83@...il.com>
> > > ---
> > >  drivers/staging/rtl8723bs/core/rtw_eeprom.c | 26 ++++++++++-----------
> > >  1 file changed, 13 insertions(+), 13 deletions(-)
> > > 
> > > diff --git a/drivers/staging/rtl8723bs/core/rtw_eeprom.c b/drivers/staging/rtl8723bs/core/rtw_eeprom.c
> > > index 3cbd65dee741..6176d741d60e 100644
> > > --- a/drivers/staging/rtl8723bs/core/rtw_eeprom.c
> > > +++ b/drivers/staging/rtl8723bs/core/rtw_eeprom.c
> > > @@ -36,7 +36,7 @@ void shift_out_bits(_adapter *padapter, u16 data, u16 count)
> > >  _func_enter_;
> > >  
> > >  	if (padapter->bSurpriseRemoved == true) {
> > > -		RT_TRACE(_module_rtl871x_eeprom_c_, _drv_err_, ("padapter->bSurpriseRemoved==true"));
> > > +		pr_err("%s padapter->bSurpriseRemoved==true", DRIVER_PREFIX);
> > 
> > As Dan said, this is not the same thing.  You are now always printing
> > out this mess, when before you were not unless you explicitly enabled
> > "tracing".
> 
> RT_TRACE is enabled if is defined the symbol DEBUG_RTL871X. It doesn't seem to be related 
> to tracing. DEBUG_RTL871X is never declared, is commented out in rtl8723bs/include/autoconf.h

That's a good sign this is never used and should just all be removed.

> that's why RT_TRACE is never printed. If we try to uncomment the symbol definition we have some
> comiling errors..

What errors do you get?

> > And you are sending it to the error log?
> > 
> > And finally, drivers should never be using pr_*() for messages, they
> > should be using dev_*() instead as they are a driver and have access to
> > a device pointer.
> > 
> > thanks,
> > 
> > greg k-h
> 
> I still wonder what's best...

Just delete them all please, they are obviously not used as no one
rebuilds the source just for this type of thing.

thanks,

greg k-h