cpufreq: exynos: Fix unsigned variable being checked for negative value

exynos_cpufreq_scale function returns signed value which was
assigned to an unsigned variable and checked for negative value which
is always false. Hence make it signed.

Fixes the following smatch warnings:
drivers/cpufreq/exynos-cpufreq.c:83 exynos_cpufreq_scale() warn: unsigned 'old_index' is never less than zero.
drivers/cpufreq/exynos-cpufreq.c:89 exynos_cpufreq_scale() warn: unsigned 'index' is never less than zero.

Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/drivers/cpufreq/exynos-cpufreq.c b/drivers/cpufreq/exynos-cpufreq.c
index 0840358bf3bc..c8c7653a6033 100644
--- a/drivers/cpufreq/exynos-cpufreq.c
+++ b/drivers/cpufreq/exynos-cpufreq.c
@@ -65,7 +65,7 @@ static int exynos_cpufreq_scale(unsigned int target_freq)
         struct cpufreq_policy *policy = cpufreq_cpu_get(0);
         unsigned int arm_volt, safe_arm_volt = 0;
         unsigned int mpll_freq_khz = exynos_info->mpll_freq_khz;
-        unsigned int index, old_index;
+        int index, old_index;
         int ret = 0;
 
         freqs.old = policy->cur;