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cpufreq: cpufreq-dt: Handle regulator_get_voltage() failure

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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>
This commit is contained in:
Stefan Wahren 2014-10-17 22:09:49 +00:00 committed by Rafael J. Wysocki
parent 0a1e879d35
commit 8197bb1bff
1 changed files with 2 additions and 2 deletions
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4
drivers/cpufreq/cpufreq-dt.c
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@ -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;
}