linux-kernel - Re: [PATCH V2 4/5] arch_topology: Return 0 or -ve errors from topology_parse_cpu

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Message-ID: <20170622142816.GC6314@vireshk-i7>
Date:   Thu, 22 Jun 2017 19:58:16 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Juri Lelli <juri.lelli@....com>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-arm-kernel@...ts.infradead.org,
        Catalin Marinas <catalin.marinas@....com>,
        linux@....linux.org.uk, Will Deacon <will.deacon@....com>,
        Vincent Guittot <vincent.guittot@...aro.org>,
        arnd.bergmann@...aro.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH V2 4/5] arch_topology: Return 0 or -ve errors from
 topology_parse_cpu_capacity()

On 22-06-17, 10:39, Juri Lelli wrote:
> Hi,
> 
> On 21/06/17 10:16, Viresh Kumar wrote:
> > Use the standard way of returning errors instead of returning 0(failure)
> > OR 1(success) and making it hard to read.
> > 
> > Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
> > ---
> >  arch/arm/kernel/topology.c   | 2 +-
> >  drivers/base/arch_topology.c | 8 ++++----
> >  2 files changed, 5 insertions(+), 5 deletions(-)
> > 
> > diff --git a/arch/arm/kernel/topology.c b/arch/arm/kernel/topology.c
> > index bf949a763dbe..a7ef4c35855e 100644
> > --- a/arch/arm/kernel/topology.c
> > +++ b/arch/arm/kernel/topology.c
> > @@ -111,7 +111,7 @@ static void __init parse_dt_topology(void)
> >  			continue;
> >  		}
> >  
> > -		if (topology_parse_cpu_capacity(cn, cpu)) {
> > +		if (!topology_parse_cpu_capacity(cn, cpu)) {
> 
> Not sure why you want to change this.

I just didn't find it straight forward to read.

> I currently read it as "if cpu_capacity parsing succedeed" continue with
> next CPU, otherwise we set cap_from_dt to false and fall back to using
> efficiencies.

Actually, I can just make the return type bool and that should solve
the issues I was seeing and keep the code as it is.

Will that be fine ?

-- 
viresh