linux-kernel - Re: [PATCH] staging: rtl8723bs: cleanup macros within include/rtw

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Message-ID: <20210210173438.GA1349@kernelvm>
Date:   Wed, 10 Feb 2021 17:34:38 +0000
From:   Phillip Potter <phil@...lpotter.co.uk>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     devel@...verdev.osuosl.org, luk@...cz.pl,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] staging: rtl8723bs: cleanup macros within
 include/rtw_debug.h

On Wed, Feb 10, 2021 at 06:12:54PM +0100, Greg KH wrote:
> On Wed, Feb 10, 2021 at 05:00:03PM +0000, Phillip Potter wrote:
> > Remove do/while loops from DBG_871X, MSG_8192C and DBG_8192C. Also
> > fix opening brace placements and trailing single statement layout within
> > RT_PRINT_DATA, as well as making newline character placement more
> > consistent and removing camel case where possible. Finally, add
> > parentheses for DBG_COUNTER definition.
> > 
> > This fixes 3 checkpatch warnings, 5 checkpatch errors and 3 checkpatch
> > checks.
> > 
> > Signed-off-by: Phillip Potter <phil@...lpotter.co.uk>
> > ---
> >  drivers/staging/rtl8723bs/include/rtw_debug.h | 40 +++++++++----------
> >  1 file changed, 19 insertions(+), 21 deletions(-)
> > 
> > diff --git a/drivers/staging/rtl8723bs/include/rtw_debug.h b/drivers/staging/rtl8723bs/include/rtw_debug.h
> > index c90adfb87261..d06ac9540cf7 100644
> > --- a/drivers/staging/rtl8723bs/include/rtw_debug.h
> > +++ b/drivers/staging/rtl8723bs/include/rtw_debug.h
> > @@ -201,19 +201,16 @@
> >  #ifdef DEBUG
> >  #if	defined(_dbgdump)
> >  	#undef DBG_871X
> > -	#define DBG_871X(...)     do {\
> > -		_dbgdump(DRIVER_PREFIX __VA_ARGS__);\
> > -	} while (0)
> > +	#define DBG_871X(...)\
> > +		_dbgdump(DRIVER_PREFIX __VA_ARGS__)
> >  
> >  	#undef MSG_8192C
> > -	#define MSG_8192C(...)     do {\
> > -		_dbgdump(DRIVER_PREFIX __VA_ARGS__);\
> > -	} while (0)
> > +	#define MSG_8192C(...)\
> > +		_dbgdump(DRIVER_PREFIX __VA_ARGS__)
> >  
> >  	#undef DBG_8192C
> > -	#define DBG_8192C(...)     do {\
> > -		_dbgdump(DRIVER_PREFIX __VA_ARGS__);\
> > -	} while (0)
> > +	#define DBG_8192C(...)\
> > +		_dbgdump(DRIVER_PREFIX __VA_ARGS__)
> 
> Odd, the do/while is correct here, why is checkpatch complaining about
> it?

The warning it gives me for these is:
WARNING: Single statement macros should not use a do {} while (0) loop

> 
> >  #endif /* defined(_dbgdump) */
> >  #endif /* DEBUG */
> >  
> > @@ -235,25 +232,26 @@
> >  
> >  #if	defined(_dbgdump)
> >  	#undef RT_PRINT_DATA
> > -	#define RT_PRINT_DATA(_Comp, _Level, _TitleString, _HexData, _HexDataLen)			\
> > -		if (((_Comp) & GlobalDebugComponents) && (_Level <= GlobalDebugLevel))	\
> > -		{									\
> > +	#define RT_PRINT_DATA(_comp, _level, _title_string, _hex_data, _hex_data_len)		\
> > +	do {											\
> > +		if (((_comp) & GlobalDebugComponents) && ((_level) <= GlobalDebugLevel)) {	\
> >  			int __i;								\
> 
> This is not the same as the above stuff, when you find yourself writing
> "also" in a changelog text, that's a huge hint you should break the
> patch up into a patch series.
> 
> Please do that here, this is too much for one patch.
> 
> thanks,
> 
> greg k-h

Thank you for the feedback, I'll do this - shall I leave out the
do/while stuff if you're saying checkpatch is wrong?

Regards,
Phil