linux-kernel - Re: [PATCH 2/2] staging: rtl8723au:core

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Date:	Sun, 26 Oct 2014 22:51:36 -0700
From:	Joe Perches <joe@...ches.com>
To:	Jes Sorensen <Jes.Sorensen@...hat.com>
Cc:	Paul McQuade <paulmcquad@...il.com>, linux-kernel@...r.kernel.org,
	devel@...verdev.osuosl.org, linux-wireless@...r.kernel.org,
	gregkh@...uxfoundation.org, Larry.Finger@...inger.net
Subject: Re: [PATCH 2/2] staging: rtl8723au:core

On Mon, 2014-10-27 at 06:45 +0100, Jes Sorensen wrote:
> Joe Perches <joe@...ches.com> writes:
> > On Sun, 2014-10-26 at 16:18 +0000, Paul McQuade wrote:
> >> ERROR: spaces required around that ':' (ctx:VxE)
[]
> >> diff --git a/drivers/staging/rtl8723au/core/rtw_ieee80211.c b/drivers/staging/rtl8723au/core/rtw_ieee80211.c
[]
> >> @@ -794,28 +794,28 @@ u16 rtw_mcs_rate23a(u8 rf_type, u8 bw_40MHz, u8 short_GI_20, u8 short_GI_40,
> >>  
> >>  	if (rf_type == RF_1T1R) {
> >>  		if (mcs->rx_mask[0] & BIT(7))
> >> -			max_rate = (bw_40MHz) ? ((short_GI_40)?1500:1350):
> >> +			max_rate = (bw_40MHz) ? ((short_GI_40)?1500:1350) :
[]
> >
> > A macro could help intelligibility here - maybe something like:
> >
> > #define get_max_rate(r1, r2, r3, r4)					\
> > 	(bw_40MHz ? (short_GI_40 ? r1 : r2) : (short_GI_20 ? r3 : r4))
> > and:
> >  		if (mcs->rx_mask[0] & BIT(7))
> > 			max_rate = get_max_rate(1500, 1350, 722, 650);
> 
> Hiding a parameter to a macro like that is bad coding practice, so don't
> do that please!

Yes and no.

Adding the other 3 arguments to the macro doesn't help legibility.

Keeping the macro definition local to the place that it's used
can help avoid typos.


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