linux-kernel - Re: [PATCH 1/2] PM / devfreq: fix sscanf handling for writable sysfs entries

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Date:	Wed, 17 Oct 2012 04:58:58 +0000 (GMT)
From:	MyungJoo Ham <myungjoo.ham@...sung.com>
To:	Nishanth Menon <nm@...com>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>
Cc:	박경민 <kyungmin.park@...sung.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>, Kevin Hilman <khilman@...com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] PM / devfreq: fix sscanf handling for writable sysfs
 entries

> sscanf returns 0 when an invalid parameter like:
> echo -n "a">min_freq
> is attempted. Returning back the return result(0) will
> cause the command not to return back to command
> prompt.
> 
> Instead, just return -EINVAL when sscanf does not
> return 1.
> 
> This is done for min_freq, max_freq and polling_interval
> 
> Cc: MyungJoo Ham <myungjoo.ham@...sung.com>
> Cc: Kyungmin Park <kyungmin.park@...sung.com>
> Cc: "Rafael J. Wysocki" <rjw@...k.pl>
> Cc: Kevin Hilman <khilman@...com>
> Cc: linux-pm@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org
> 
> Signed-off-by: Nishanth Menon <nm@...com>

Acked-by: MyungJoo Ham <myungjoo.ham@...sung.com>