It's unnecessary to set the same freq again and run notifier calls.
Signed-off-by: Dong Aisheng <aisheng.d...@nxp.com>
---
drivers/devfreq/devfreq.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
index bf3047896e41..6e80bf70e7b3 100644
--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c
@@ -358,6 +358,9 @@ static int devfreq_set_target(struct devfreq *devfreq,
unsigned long new_freq,
else
cur_freq = devfreq->previous_freq;
+ if (new_freq == cur_freq)
+ return 0;
+
freqs.old = cur_freq;
freqs.new = new_freq;
devfreq_notify_transition(devfreq, &freqs, DEVFREQ_PRECHANGE);
@@ -374,7 +377,7 @@ static int devfreq_set_target(struct devfreq *devfreq,
unsigned long new_freq,
* and DEVFREQ_POSTCHANGE because for showing the correct frequency
* change order of between devfreq device and passive devfreq device.
*/
- if (trace_devfreq_frequency_enabled() && new_freq != cur_freq)
+ if (trace_devfreq_frequency_enabled())
trace_devfreq_frequency(devfreq, new_freq, cur_freq);
freqs.new = new_freq;
--
2.25.1
