diff mbox series

[v2,04/17] thermal: core: Clean up cdev binding/unbinding functions

Message ID 2819322.BEx9A2HvPv@rjwysocki.net (mailing list archive)
State Rejected, archived
Headers show
Series thermal: Rework binding cooling devices to trip points | expand

Commit Message

Rafael J. Wysocki Aug. 12, 2024, 1:56 p.m. UTC
From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Add a new label to thermal_bind_cdev_to_trip() and use it to eliminate
two redundant !result check from that function, rename a label in
thermal_unbind_cdev_from_trip() to reflect its actual purpose and
adjust some white space in these functions.

No intentional functional impact.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
---

v1 -> v2: No changes.

---
 drivers/thermal/thermal_core.c |   32 ++++++++++++++++++--------------
 1 file changed, 18 insertions(+), 14 deletions(-)

Comments

Zhang Rui Aug. 13, 2024, 7:38 a.m. UTC | #1
On Mon, 2024-08-12 at 15:56 +0200, Rafael J. Wysocki wrote:
> From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> 
> Add a new label to thermal_bind_cdev_to_trip() and use it to
> eliminate
> two redundant !result check from that function, rename a label in
> thermal_unbind_cdev_from_trip() to reflect its actual purpose and
> adjust some white space in these functions.
> 
> No intentional functional impact.
> 
> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> ---
> 
> v1 -> v2: No changes.
> 
> ---
>  drivers/thermal/thermal_core.c |   32 ++++++++++++++++++------------
> --
>  1 file changed, 18 insertions(+), 14 deletions(-)
> 
> Index: linux-pm/drivers/thermal/thermal_core.c
> ===================================================================
> --- linux-pm.orig/drivers/thermal/thermal_core.c
> +++ linux-pm/drivers/thermal/thermal_core.c
> @@ -806,6 +806,7 @@ int thermal_bind_cdev_to_trip(struct the
>         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
>         if (!dev)
>                 return -ENOMEM;
> +
>         dev->tz = tz;
>         dev->cdev = cdev;
>         dev->trip = trip;
> @@ -821,8 +822,7 @@ int thermal_bind_cdev_to_trip(struct the
>  
>         dev->id = result;
>         sprintf(dev->name, "cdev%d", dev->id);
> -       result =
> -           sysfs_create_link(&tz->device.kobj, &cdev->device.kobj,
> dev->name);
> +       result = sysfs_create_link(&tz->device.kobj, &cdev-
> >device.kobj, dev->name);
>         if (result)
>                 goto release_ida;
>  
> @@ -849,24 +849,26 @@ int thermal_bind_cdev_to_trip(struct the
>  
>         mutex_lock(&tz->lock);
>         mutex_lock(&cdev->lock);
> -       list_for_each_entry(pos, &tz->thermal_instances, tz_node)
> +
> +       list_for_each_entry(pos, &tz->thermal_instances, tz_node) {
>                 if (pos->trip == trip && pos->cdev == cdev) {
>                         result = -EEXIST;
> -                       break;
> +                       goto remove_weight_file;

Need to unlock tz->lock and cdev->lock before quitting?

thanks,
rui

>                 }
> -       if (!result) {
> -               list_add_tail(&dev->tz_node, &tz->thermal_instances);
> -               list_add_tail(&dev->cdev_node, &cdev-
> >thermal_instances);
> -               atomic_set(&tz->need_update, 1);
> -
> -               thermal_governor_update_tz(tz, THERMAL_TZ_BIND_CDEV);
>         }
> +
> +       list_add_tail(&dev->tz_node, &tz->thermal_instances);
> +       list_add_tail(&dev->cdev_node, &cdev->thermal_instances);
> +       atomic_set(&tz->need_update, 1);
> +
> +       thermal_governor_update_tz(tz, THERMAL_TZ_BIND_CDEV);
> +
>         mutex_unlock(&cdev->lock);
>         mutex_unlock(&tz->lock);
>  
> -       if (!result)
> -               return 0;
> +       return 0;
>  
> +remove_weight_file:
>         device_remove_file(&tz->device, &dev->weight_attr);
>  remove_trip_file:
>         device_remove_file(&tz->device, &dev->attr);
> @@ -914,6 +916,7 @@ int thermal_unbind_cdev_from_trip(struct
>  
>         mutex_lock(&tz->lock);
>         mutex_lock(&cdev->lock);
> +
>         list_for_each_entry_safe(pos, next, &tz->thermal_instances,
> tz_node) {
>                 if (pos->trip == trip && pos->cdev == cdev) {
>                         list_del(&pos->tz_node);
> @@ -923,15 +926,16 @@ int thermal_unbind_cdev_from_trip(struct
>  
>                         mutex_unlock(&cdev->lock);
>                         mutex_unlock(&tz->lock);
> -                       goto unbind;
> +                       goto free;
>                 }
>         }
> +
>         mutex_unlock(&cdev->lock);
>         mutex_unlock(&tz->lock);
>  
>         return -ENODEV;
>  
> -unbind:
> +free:
>         device_remove_file(&tz->device, &pos->weight_attr);
>         device_remove_file(&tz->device, &pos->attr);
>         sysfs_remove_link(&tz->device.kobj, pos->name);
> 
> 
>
Rafael J. Wysocki Aug. 13, 2024, 10:54 a.m. UTC | #2
On Tue, Aug 13, 2024 at 9:39 AM Zhang, Rui <rui.zhang@intel.com> wrote:
>
> On Mon, 2024-08-12 at 15:56 +0200, Rafael J. Wysocki wrote:
> > From: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> >
> > Add a new label to thermal_bind_cdev_to_trip() and use it to
> > eliminate
> > two redundant !result check from that function, rename a label in
> > thermal_unbind_cdev_from_trip() to reflect its actual purpose and
> > adjust some white space in these functions.
> >
> > No intentional functional impact.
> >
> > Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
> > ---
> >
> > v1 -> v2: No changes.
> >
> > ---
> >  drivers/thermal/thermal_core.c |   32 ++++++++++++++++++------------
> > --
> >  1 file changed, 18 insertions(+), 14 deletions(-)
> >
> > Index: linux-pm/drivers/thermal/thermal_core.c
> > ===================================================================
> > --- linux-pm.orig/drivers/thermal/thermal_core.c
> > +++ linux-pm/drivers/thermal/thermal_core.c
> > @@ -806,6 +806,7 @@ int thermal_bind_cdev_to_trip(struct the
> >         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
> >         if (!dev)
> >                 return -ENOMEM;
> > +
> >         dev->tz = tz;
> >         dev->cdev = cdev;
> >         dev->trip = trip;
> > @@ -821,8 +822,7 @@ int thermal_bind_cdev_to_trip(struct the
> >
> >         dev->id = result;
> >         sprintf(dev->name, "cdev%d", dev->id);
> > -       result =
> > -           sysfs_create_link(&tz->device.kobj, &cdev->device.kobj,
> > dev->name);
> > +       result = sysfs_create_link(&tz->device.kobj, &cdev-
> > >device.kobj, dev->name);
> >         if (result)
> >                 goto release_ida;
> >
> > @@ -849,24 +849,26 @@ int thermal_bind_cdev_to_trip(struct the
> >
> >         mutex_lock(&tz->lock);
> >         mutex_lock(&cdev->lock);
> > -       list_for_each_entry(pos, &tz->thermal_instances, tz_node)
> > +
> > +       list_for_each_entry(pos, &tz->thermal_instances, tz_node) {
> >                 if (pos->trip == trip && pos->cdev == cdev) {
> >                         result = -EEXIST;
> > -                       break;
> > +                       goto remove_weight_file;
>
> Need to unlock tz->lock and cdev->lock before quitting?

Yes, of course.

Nice catch, thank you!

I'll drop this patch as it's not worth salvaging IMO.

> >                 }
> > -       if (!result) {
> > -               list_add_tail(&dev->tz_node, &tz->thermal_instances);
> > -               list_add_tail(&dev->cdev_node, &cdev-
> > >thermal_instances);
> > -               atomic_set(&tz->need_update, 1);
> > -
> > -               thermal_governor_update_tz(tz, THERMAL_TZ_BIND_CDEV);
> >         }
> > +
> > +       list_add_tail(&dev->tz_node, &tz->thermal_instances);
> > +       list_add_tail(&dev->cdev_node, &cdev->thermal_instances);
> > +       atomic_set(&tz->need_update, 1);
> > +
> > +       thermal_governor_update_tz(tz, THERMAL_TZ_BIND_CDEV);
> > +
> >         mutex_unlock(&cdev->lock);
> >         mutex_unlock(&tz->lock);
> >
> > -       if (!result)
> > -               return 0;
> > +       return 0;
> >
> > +remove_weight_file:
> >         device_remove_file(&tz->device, &dev->weight_attr);
> >  remove_trip_file:
> >         device_remove_file(&tz->device, &dev->attr);
> > @@ -914,6 +916,7 @@ int thermal_unbind_cdev_from_trip(struct
> >
> >         mutex_lock(&tz->lock);
> >         mutex_lock(&cdev->lock);
> > +
> >         list_for_each_entry_safe(pos, next, &tz->thermal_instances,
> > tz_node) {
> >                 if (pos->trip == trip && pos->cdev == cdev) {
> >                         list_del(&pos->tz_node);
> > @@ -923,15 +926,16 @@ int thermal_unbind_cdev_from_trip(struct
> >
> >                         mutex_unlock(&cdev->lock);
> >                         mutex_unlock(&tz->lock);
> > -                       goto unbind;
> > +                       goto free;
> >                 }
> >         }
> > +
> >         mutex_unlock(&cdev->lock);
> >         mutex_unlock(&tz->lock);
> >
> >         return -ENODEV;
> >
> > -unbind:
> > +free:
> >         device_remove_file(&tz->device, &pos->weight_attr);
> >         device_remove_file(&tz->device, &pos->attr);
> >         sysfs_remove_link(&tz->device.kobj, pos->name);
> >
> >
> >
>
diff mbox series

Patch

Index: linux-pm/drivers/thermal/thermal_core.c
===================================================================
--- linux-pm.orig/drivers/thermal/thermal_core.c
+++ linux-pm/drivers/thermal/thermal_core.c
@@ -806,6 +806,7 @@  int thermal_bind_cdev_to_trip(struct the
 	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
 	if (!dev)
 		return -ENOMEM;
+
 	dev->tz = tz;
 	dev->cdev = cdev;
 	dev->trip = trip;
@@ -821,8 +822,7 @@  int thermal_bind_cdev_to_trip(struct the
 
 	dev->id = result;
 	sprintf(dev->name, "cdev%d", dev->id);
-	result =
-	    sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name);
+	result = sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev->name);
 	if (result)
 		goto release_ida;
 
@@ -849,24 +849,26 @@  int thermal_bind_cdev_to_trip(struct the
 
 	mutex_lock(&tz->lock);
 	mutex_lock(&cdev->lock);
-	list_for_each_entry(pos, &tz->thermal_instances, tz_node)
+
+	list_for_each_entry(pos, &tz->thermal_instances, tz_node) {
 		if (pos->trip == trip && pos->cdev == cdev) {
 			result = -EEXIST;
-			break;
+			goto remove_weight_file;
 		}
-	if (!result) {
-		list_add_tail(&dev->tz_node, &tz->thermal_instances);
-		list_add_tail(&dev->cdev_node, &cdev->thermal_instances);
-		atomic_set(&tz->need_update, 1);
-
-		thermal_governor_update_tz(tz, THERMAL_TZ_BIND_CDEV);
 	}
+
+	list_add_tail(&dev->tz_node, &tz->thermal_instances);
+	list_add_tail(&dev->cdev_node, &cdev->thermal_instances);
+	atomic_set(&tz->need_update, 1);
+
+	thermal_governor_update_tz(tz, THERMAL_TZ_BIND_CDEV);
+
 	mutex_unlock(&cdev->lock);
 	mutex_unlock(&tz->lock);
 
-	if (!result)
-		return 0;
+	return 0;
 
+remove_weight_file:
 	device_remove_file(&tz->device, &dev->weight_attr);
 remove_trip_file:
 	device_remove_file(&tz->device, &dev->attr);
@@ -914,6 +916,7 @@  int thermal_unbind_cdev_from_trip(struct
 
 	mutex_lock(&tz->lock);
 	mutex_lock(&cdev->lock);
+
 	list_for_each_entry_safe(pos, next, &tz->thermal_instances, tz_node) {
 		if (pos->trip == trip && pos->cdev == cdev) {
 			list_del(&pos->tz_node);
@@ -923,15 +926,16 @@  int thermal_unbind_cdev_from_trip(struct
 
 			mutex_unlock(&cdev->lock);
 			mutex_unlock(&tz->lock);
-			goto unbind;
+			goto free;
 		}
 	}
+
 	mutex_unlock(&cdev->lock);
 	mutex_unlock(&tz->lock);
 
 	return -ENODEV;
 
-unbind:
+free:
 	device_remove_file(&tz->device, &pos->weight_attr);
 	device_remove_file(&tz->device, &pos->attr);
 	sysfs_remove_link(&tz->device.kobj, pos->name);