linux-kernel - Re: [PATCH 0/2] Properly fix sysfs_get_idlestate

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Message-ID: <4068135.ExVigq9HJY@vostro.rjw.lan>
Date:	Sun, 14 Dec 2014 22:30:17 +0100
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	Prarit Bhargava <prarit@...hat.com>
Cc:	linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
	Thomas Renninger <trenn@...e.de>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>
Subject: Re: [PATCH 0/2] Properly fix sysfs_get_idlestate_count()

On Sunday, December 14, 2014 09:06:36 AM Prarit Bhargava wrote:
> My previous commit 16b7c275c055 ("tools: cpupower: fix return checks for
> sysfs_get_idlestate_count()") was not correct.  After looking
> at the changelog for cpupower I noticed that Thomas had changed the return of
> sysfs_get_idlestate_count() to an unsigned int to simplify the code.  The
> problem is really that both he (in his original change) and I (in my new
> change) missed the obvious that sysfs_get_idlestate_count()
> can't return -ENODEV.  It should just return 0 for "no c-states".
> 
> Patch 1 reverts my recent change and patch 2 fixes the problem correctly.
> 
> Sorry 'bout that Thomas.  I should have caught that the the first time.
> 
> Cc: Thomas Renninger <trenn@...e.de>
> Cc: Rafael J. Wysocki <rafael.j.wysocki@...el.com>
> Signed-off-by: Prarit Bhargava <prarit@...hat.com>
> 
> Prarit Bhargava (2):
>   Revert "tools: cpupower: fix return checks for
>     sysfs_get_idlestate_count()"
>   Fix no idle state information return value
> 
>  tools/power/cpupower/utils/cpuidle-info.c  |    8 ++++----
>  tools/power/cpupower/utils/helpers/sysfs.c |    2 +-
>  2 files changed, 5 insertions(+), 5 deletions(-)

I'll queue up the revert, but I need an ACK from Thomas for the second patch.


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