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

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Message-ID: <CAE9FiQXP3DARdJYHBS8w0ATVM78Q9tGTd=8CeMJiwozBU0F_OA@mail.gmail.com>
Date:	Thu, 19 Sep 2013 18:31:52 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	Viresh Kumar <viresh.kumar@...aro.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 Thu, Sep 19, 2013 at 3:37 PM, Rafael J. Wysocki <rjw@...k.pl> wrote:
> 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!

Sorry,  looks like this one is not enough.

please let me know if you prefer me send addon patch
or revised one.

Thanks

Yinghai
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