[01/11] PM / devfreq: Init user limits from OPP limits, not viceversa
diff mbox

Message ID 20180525203043.249193-2-mka@chromium.org
State Not Applicable
Headers show

Commit Message

Matthias Kaehlcke May 25, 2018, 8:30 p.m. UTC
Commit ab8f58ad72c4 ("PM / devfreq: Set min/max_freq when adding
the devfreq device") introduced the initialization of the user
limits min/max_freq from the lowest/highest available OPPs. Later
commit f1d981eaecf8 ("PM / devfreq: Use the available min/max
frequency") added scaling_min/max_freq, which actually represent
the frequencies of the lowest/highest available OPP. scaling_min/
max_freq are initialized with the values from min/max_freq, which
is totally correct in the context, but a bit awkward to read.

Swap the initialization and assign scaling_min/max_freq with the
OPP freqs and then the user limts min/max_freq with scaling_min/
max_freq.

Needless to say that this change is a NOP, intended to improve
readability.

Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
---
 drivers/devfreq/devfreq.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

Comments

Chanwoo Choi May 28, 2018, 5:26 a.m. UTC | #1
Hi,

On 2018년 05월 26일 05:30, Matthias Kaehlcke wrote:
> Commit ab8f58ad72c4 ("PM / devfreq: Set min/max_freq when adding
> the devfreq device") introduced the initialization of the user
> limits min/max_freq from the lowest/highest available OPPs. Later
> commit f1d981eaecf8 ("PM / devfreq: Use the available min/max
> frequency") added scaling_min/max_freq, which actually represent
> the frequencies of the lowest/highest available OPP. scaling_min/
> max_freq are initialized with the values from min/max_freq, which
> is totally correct in the context, but a bit awkward to read.
> 
> Swap the initialization and assign scaling_min/max_freq with the
> OPP freqs and then the user limts min/max_freq with scaling_min/
> max_freq.
> 
> Needless to say that this change is a NOP, intended to improve
> readability.
> 
> Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
> ---
>  drivers/devfreq/devfreq.c | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
> index fe2af6aa88fc..0057ef5b0a98 100644
> --- a/drivers/devfreq/devfreq.c
> +++ b/drivers/devfreq/devfreq.c
> @@ -604,21 +604,21 @@ struct devfreq *devfreq_add_device(struct device *dev,
>  		mutex_lock(&devfreq->lock);
>  	}
>  
> -	devfreq->min_freq = find_available_min_freq(devfreq);
> -	if (!devfreq->min_freq) {
> +	devfreq->scaling_min_freq = find_available_min_freq(devfreq);
> +	if (!devfreq->scaling_min_freq) {
>  		mutex_unlock(&devfreq->lock);
>  		err = -EINVAL;
>  		goto err_dev;
>  	}
> -	devfreq->scaling_min_freq = devfreq->min_freq;
> +	devfreq->min_freq = devfreq->scaling_min_freq;
>  
> -	devfreq->max_freq = find_available_max_freq(devfreq);
> -	if (!devfreq->max_freq) {
> +	devfreq->scaling_max_freq = find_available_max_freq(devfreq);
> +	if (!devfreq->scaling_max_freq) {
>  		mutex_unlock(&devfreq->lock);
>  		err = -EINVAL;
>  		goto err_dev;
>  	}
> -	devfreq->scaling_max_freq = devfreq->max_freq;
> +	devfreq->max_freq = devfreq->scaling_max_freq;
>  
>  	dev_set_name(&devfreq->dev, "devfreq%d",
>  				atomic_inc_return(&devfreq_no));
> 

I already replied with my Reviewed-by tag. You are missing my tag.

Again, 
Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>
Matthias Kaehlcke May 29, 2018, 6:06 p.m. UTC | #2
On Mon, May 28, 2018 at 02:26:49PM +0900, Chanwoo Choi wrote:
> Hi,
> 
> On 2018년 05월 26일 05:30, Matthias Kaehlcke wrote:
> > Commit ab8f58ad72c4 ("PM / devfreq: Set min/max_freq when adding
> > the devfreq device") introduced the initialization of the user
> > limits min/max_freq from the lowest/highest available OPPs. Later
> > commit f1d981eaecf8 ("PM / devfreq: Use the available min/max
> > frequency") added scaling_min/max_freq, which actually represent
> > the frequencies of the lowest/highest available OPP. scaling_min/
> > max_freq are initialized with the values from min/max_freq, which
> > is totally correct in the context, but a bit awkward to read.
> > 
> > Swap the initialization and assign scaling_min/max_freq with the
> > OPP freqs and then the user limts min/max_freq with scaling_min/
> > max_freq.
> > 
> > Needless to say that this change is a NOP, intended to improve
> > readability.
> > 
> > Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
> > ---
> >  drivers/devfreq/devfreq.c | 12 ++++++------
> >  1 file changed, 6 insertions(+), 6 deletions(-)
> > 
> > diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
> > index fe2af6aa88fc..0057ef5b0a98 100644
> > --- a/drivers/devfreq/devfreq.c
> > +++ b/drivers/devfreq/devfreq.c
> > @@ -604,21 +604,21 @@ struct devfreq *devfreq_add_device(struct device *dev,
> >  		mutex_lock(&devfreq->lock);
> >  	}
> >  
> > -	devfreq->min_freq = find_available_min_freq(devfreq);
> > -	if (!devfreq->min_freq) {
> > +	devfreq->scaling_min_freq = find_available_min_freq(devfreq);
> > +	if (!devfreq->scaling_min_freq) {
> >  		mutex_unlock(&devfreq->lock);
> >  		err = -EINVAL;
> >  		goto err_dev;
> >  	}
> > -	devfreq->scaling_min_freq = devfreq->min_freq;
> > +	devfreq->min_freq = devfreq->scaling_min_freq;
> >  
> > -	devfreq->max_freq = find_available_max_freq(devfreq);
> > -	if (!devfreq->max_freq) {
> > +	devfreq->scaling_max_freq = find_available_max_freq(devfreq);
> > +	if (!devfreq->scaling_max_freq) {
> >  		mutex_unlock(&devfreq->lock);
> >  		err = -EINVAL;
> >  		goto err_dev;
> >  	}
> > -	devfreq->scaling_max_freq = devfreq->max_freq;
> > +	devfreq->max_freq = devfreq->scaling_max_freq;
> >  
> >  	dev_set_name(&devfreq->dev, "devfreq%d",
> >  				atomic_inc_return(&devfreq_no));
> > 
> 
> I already replied with my Reviewed-by tag. You are missing my tag.
> 
> Again, 
> Reviewed-by: Chanwoo Choi <cw00.choi@samsung.com>

Sorry, forgot to add the tag after creating the series. I now added it
to my local tree.

Patch
diff mbox

diff --git a/drivers/devfreq/devfreq.c b/drivers/devfreq/devfreq.c
index fe2af6aa88fc..0057ef5b0a98 100644
--- a/drivers/devfreq/devfreq.c
+++ b/drivers/devfreq/devfreq.c
@@ -604,21 +604,21 @@  struct devfreq *devfreq_add_device(struct device *dev,
 		mutex_lock(&devfreq->lock);
 	}
 
-	devfreq->min_freq = find_available_min_freq(devfreq);
-	if (!devfreq->min_freq) {
+	devfreq->scaling_min_freq = find_available_min_freq(devfreq);
+	if (!devfreq->scaling_min_freq) {
 		mutex_unlock(&devfreq->lock);
 		err = -EINVAL;
 		goto err_dev;
 	}
-	devfreq->scaling_min_freq = devfreq->min_freq;
+	devfreq->min_freq = devfreq->scaling_min_freq;
 
-	devfreq->max_freq = find_available_max_freq(devfreq);
-	if (!devfreq->max_freq) {
+	devfreq->scaling_max_freq = find_available_max_freq(devfreq);
+	if (!devfreq->scaling_max_freq) {
 		mutex_unlock(&devfreq->lock);
 		err = -EINVAL;
 		goto err_dev;
 	}
-	devfreq->scaling_max_freq = devfreq->max_freq;
+	devfreq->max_freq = devfreq->scaling_max_freq;
 
 	dev_set_name(&devfreq->dev, "devfreq%d",
 				atomic_inc_return(&devfreq_no));