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SubjectRe: [PATCH 04/11] PM / devfreq: bail out early if no freq changes in devfreq_set_target
On Tue, Mar 9, 2021 at 11:47 PM Chanwoo Choi <cwchoi00@gmail.com> wrote:
>
> On 21. 3. 9. 오후 9:58, Dong Aisheng wrote:
> > It's unnecessary to set the same freq again and run notifier calls.
> >
> > Signed-off-by: Dong Aisheng <aisheng.dong@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;
> >
>
> I'd like you to squash patch4 with patch6 because actually patch6
> is too minor clean-up. I think it is possible.

Got it, will squash when re-send.

Regards
Aisheng

>
> --
> Best Regards,
> Samsung Electronics
> Chanwoo Choi

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