cpufreq: interactive: Round up timer_rate to match jiffy
Timers are scheduled in unit of jiffies. Round up timer_rate so that
it matches the actual sampling period.
Change-Id: I88386a5a448e40333f9a9b9f0cf72af58cb54656
Signed-off-by: Junjie Wu <junjiew@codeaurora.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
diff --git a/drivers/cpufreq/cpufreq_interactive.c b/drivers/cpufreq/cpufreq_interactive.c
index 49f206e..6bbcc90 100644
--- a/drivers/cpufreq/cpufreq_interactive.c
+++ b/drivers/cpufreq/cpufreq_interactive.c
@@ -855,12 +855,18 @@
const char *buf, size_t count)
{
int ret;
- unsigned long val;
+ unsigned long val, val_round;
ret = strict_strtoul(buf, 0, &val);
if (ret < 0)
return ret;
- tunables->timer_rate = val;
+
+ val_round = jiffies_to_usecs(usecs_to_jiffies(val));
+ if (val != val_round)
+ pr_warn("timer_rate not aligned to jiffy. Rounded up to %lu\n",
+ val_round);
+
+ tunables->timer_rate = val_round;
return count;
}