netdev - Re: [PATCH 3/3] thermal: intel: hfi: Enable interface only when required

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Message-ID: <ZbuahAPSKbJgQmlI@linux.intel.com>
Date: Thu, 1 Feb 2024 14:20:04 +0100
From: Stanislaw Gruszka <stanislaw.gruszka@...ux.intel.com>
To: Ricardo Neri <ricardo.neri-calderon@...ux.intel.com>
Cc: linux-pm@...r.kernel.org, "Rafael J. Wysocki" <rafael@...nel.org>,
	Srinivas Pandruvada <srinivas.pandruvada@...ux.intel.com>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	netdev@...r.kernel.org
Subject: Re: [PATCH 3/3] thermal: intel: hfi: Enable interface only when
 required

On Wed, Jan 31, 2024 at 05:48:08PM -0800, Ricardo Neri wrote:
> >  drivers/thermal/intel/intel_hfi.c | 82 +++++++++++++++++++++++++++----
> >  1 file changed, 73 insertions(+), 9 deletions(-)
> > 
> > diff --git a/drivers/thermal/intel/intel_hfi.c b/drivers/thermal/intel/intel_hfi.c
> > index 3b04c6ec4fca..50601f75f6dc 100644
> > --- a/drivers/thermal/intel/intel_hfi.c
> > +++ b/drivers/thermal/intel/intel_hfi.c
> > @@ -30,6 +30,7 @@
> >  #include <linux/kernel.h>
> >  #include <linux/math.h>
> >  #include <linux/mutex.h>
> > +#include <linux/netlink.h>
> >  #include <linux/percpu-defs.h>
> >  #include <linux/printk.h>
> >  #include <linux/processor.h>
> > @@ -480,7 +481,8 @@ void intel_hfi_online(unsigned int cpu)
> >  	/* Enable this HFI instance if this is its first online CPU. */
> >  	if (cpumask_weight(hfi_instance->cpus) == 1) {
> >  		hfi_set_hw_table(hfi_instance);
> > -		hfi_enable();
> > +		if (thermal_group_has_listeners(THERMAL_GENL_EVENT_GROUP))
> > +			hfi_enable();
> 
> You could avoid the extra level of indentation if you did:
> 	if (cpumask_weight() == 1 && has_listeners())

Ok.

> You would need to also update the comment.

I'd rather remove the comment, code looks obvious enough for me.

Regards
Stanislaw