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

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Date:	Mon, 27 Oct 2014 07:44:37 +0100
From:	Jes Sorensen <Jes.Sorensen@...hat.com>
To:	Joe Perches <joe@...ches.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

Joe Perches <joe@...ches.com> writes:
> On Mon, 2014-10-27 at 07:16 +0100, Jes Sorensen wrote:
>> Joe Perches <joe@...ches.com> writes:
>> > 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.
>> 
>> It's wrong, so just don't do it here!
>
> It's not "wrong", you just don't like it.

I consider it wrong, and I am the co-maintainer of this driver .... and
I NACK it.

There's a gazillion real issues to fix in this driver, adding a bad
macro isn't on that list.

Jes
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