From 90d423faa0ed53cfda9f12d119f6938dd1ab515d Mon Sep 17 00:00:00 2001
From: Paul Walmsley <pwalmsley@nvidia.com>
Date: Tue, 26 Nov 2013 16:49:38 -0800
Subject: [PATCH] ARM: shmobile: mackerel: clk_round_rate() can return a zero
 to indicate an 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.

Signed-off-by: Paul Walmsley <pwalmsley@nvidia.com>
Acked-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
---
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