linux-kernel - Re: [PATCH] cpufreq: return EEXIST instead of EBUSY for second registering

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Date:	Fri, 20 Sep 2013 00:37:50 +0200
From:	"Rafael J. Wysocki" <rjw@...k.pl>
To:	Viresh Kumar <viresh.kumar@...aro.org>
Cc:	Yinghai Lu <yinghai@...nel.org>,
	"cpufreq@...r.kernel.org" <cpufreq@...r.kernel.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] cpufreq: return EEXIST instead of EBUSY for second registering

On Thursday, September 19, 2013 09:38:32 AM Viresh Kumar wrote:
> On 19 September 2013 09:35, Yinghai Lu <yinghai@...nel.org> wrote:
> > System that cpu support intel_pstate, acpi_cpufreq fail to
> > load, and udev keep trying until trace get filled up and
> > kernel crash.
> >
> > The root cause is driver return ret from cpufreq_register_driver
> > and when some other driver take over before, it would return
> > EBUSY, then udev will keep trying...
> >
> > cpufreq_register_driver should return EEXIST instead.
> > then system could boot without appending intel_pstate=disable
> > and still use intel_pstate.
> >
> > Signed-off-by: Yinghai Lu <yinghai@...nel.org>
> 
> Acked-by: Viresh Kumar <viresh.kumar@...aro.org>

Applied, thanks!


-- 
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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