> 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@samsung.com>
> Cc: Kyungmin Park <kyungmin.park@samsung.com>
> Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
> Cc: Kevin Hilman <khilman@ti.com>
> Cc: linux-pm@vger.kernel.org
> Cc: linux-kernel@vger.kernel.org
> 
> Signed-off-by: Nishanth Menon <nm@ti.com>

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

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