cpufreq: cpufreq-dt: Handle regulator_get_voltage() failure

In error cases regulator_get_voltage() returns a negative value.
So take care of it.

Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/cpufreq/cpufreq-dt.c b/drivers/cpufreq/cpufreq-dt.c
index 725fb1d86578..8cba13df5f28 100644
--- a/drivers/cpufreq/cpufreq-dt.c
+++ b/drivers/cpufreq/cpufreq-dt.c
@@ -78,7 +78,7 @@ static int set_target(struct cpufreq_policy *policy, unsigned int index)
         }
 
         dev_dbg(cpu_dev, "%u MHz, %ld mV --> %u MHz, %ld mV\n",
-                old_freq / 1000, volt_old ? volt_old / 1000 : -1,
+                old_freq / 1000, (volt_old > 0) ? volt_old / 1000 : -1,
                 new_freq / 1000, volt ? volt / 1000 : -1);
 
         /* scaling up?  scale voltage before frequency */
@@ -94,7 +94,7 @@ static int set_target(struct cpufreq_policy *policy, unsigned int index)
         ret = clk_set_rate(cpu_clk, freq_exact);
         if (ret) {
                 dev_err(cpu_dev, "failed to set clock rate: %d\n", ret);
-                if (!IS_ERR(cpu_reg))
+                if (!IS_ERR(cpu_reg) && volt_old > 0)
                         regulator_set_voltage_tol(cpu_reg, volt_old, tol);
                 return ret;
         }