cpufreq-dt: fix handling regulator_get_voltage() result

The function can return negative values so it should be assigned
to signed type.

The problem has been detected using proposed semantic patch
scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci.

Link: http://permalink.gmane.org/gmane.linux.kernel/2038576
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 3 insertions, 2 deletions

diff --git a/drivers/cpufreq/cpufreq-dt.c b/drivers/cpufreq/cpufreq-dt.c
index 1ceece9d6711..9bc37c437874 100644
--- a/drivers/cpufreq/cpufreq-dt.c
+++ b/drivers/cpufreq/cpufreq-dt.c
@@ -50,7 +50,8 @@ static int set_target(struct cpufreq_policy *policy, unsigned int index)
         struct private_data *priv = policy->driver_data;
         struct device *cpu_dev = priv->cpu_dev;
         struct regulator *cpu_reg = priv->cpu_reg;
-        unsigned long volt = 0, volt_old = 0, tol = 0;
+        unsigned long volt = 0, tol = 0;
+        int volt_old = 0;
         unsigned int old_freq, new_freq;
         long freq_Hz, freq_exact;
         int ret;
@@ -83,7 +84,7 @@ static int set_target(struct cpufreq_policy *policy, unsigned int index)
                         opp_freq / 1000, volt);
         }
 
-        dev_dbg(cpu_dev, "%u MHz, %ld mV --> %u MHz, %ld mV\n",
+        dev_dbg(cpu_dev, "%u MHz, %d mV --> %u MHz, %ld mV\n",
                 old_freq / 1000, (volt_old > 0) ? volt_old / 1000 : -1,
                 new_freq / 1000, volt ? volt / 1000 : -1);