From c68789e5346f165441f41a6e09ebfd7caa0c8745 Mon Sep 17 00:00:00 2001
From: Paul Walmsley <pwalmsley@nvidia.com>
Date: Mon, 9 Dec 2013 18:09:22 -0800
Subject: [PATCH] thermal: ti-soc-thermal: clk_round_rate() can return a zero
 upon error

Treat both negative and zero return values from clk_round_rate() as
errors.  This is needed since subsequent patches will convert
clk_round_rate()'s return value to be an unsigned type, rather than a
signed type, since some clock sources can generate rates higher than
(2^31)-1 Hz.

Eventually, when calling clk_round_rate(), only a return value of zero
will be considered a error.  All other values will be considered valid
rates.  The comparison against values less than 0 is kept to preserve
the correct behavior in the meantime.

This patch also gets rid of a comparison between unsigned and signed
values; a side-benefit.

Signed-off-by: Paul Walmsley <pwalmsley@nvidia.com>
Cc: Eduardo Valentin <eduardo.valentin@ti.com>
Cc: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
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