PRECHANGE and POSTCHANGE notifiers must be called in groups, i.e either both should be called or both shouldn't be.
In case we have started PRECHANGE notifier and found an error, we must call POSTCHANGE notifier with freqs.new = freqs.old to guarantee that sequence of calling notifiers is complete.
This patch fixes it.
Cc: Stephen Warren swarren@nvidia.com Signed-off-by: Viresh Kumar viresh.kumar@linaro.org --- drivers/cpufreq/tegra-cpufreq.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/cpufreq/tegra-cpufreq.c b/drivers/cpufreq/tegra-cpufreq.c index c74c0e1..e74d777 100644 --- a/drivers/cpufreq/tegra-cpufreq.c +++ b/drivers/cpufreq/tegra-cpufreq.c @@ -138,12 +138,12 @@ static int tegra_update_cpu_speed(struct cpufreq_policy *policy, if (ret) { pr_err("cpu-tegra: Failed to set cpu frequency to %d kHz\n", freqs.new); - return ret; + freqs.new = freqs.old; }
cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE);
- return 0; + return ret; }
static unsigned long tegra_cpu_highest_speed(void)