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cpufreq-dt: fix handling regulator_get_voltage() result

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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>
This commit is contained in:
Andrzej Hajda 2015-12-30 12:18:42 +01:00 committed by Rafael J. Wysocki
parent 0df35026c6
commit 929ca89c30
1 changed files with 3 additions and 2 deletions
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5
drivers/cpufreq/cpufreq-dt.c
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@ -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);