linux-kernel - [PATCHv4 07/48] thermal: core: move passive attr to tz->device.groups

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 30 May 2016 23:18:14 -0700
From:	Eduardo Valentin <edubezval@...il.com>
To:	Rui Zhang <rui.zhang@...el.com>
Cc:	Linux PM <linux-pm@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>, Keerthy <a0393675@...com>,
	Eduardo Valentin <edubezval@...il.com>
Subject: [PATCHv4 07/48] thermal: core: move passive attr to tz->device.groups

This patch moves the passive attribute to tz->device.groups. Moving the
passive attribute also requires a .is_visible() callback implementation
for its attribute group.

The logic behind the visibility of passive attribute is kept the same.
We only expose the passive attribute if the thermal driver has exposed
at least one passive trip point.

Cc: Zhang Rui <rui.zhang@...el.com>
Cc: linux-pm@...r.kernel.org
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Eduardo Valentin <edubezval@...il.com>
---
 drivers/thermal/thermal_core.c | 42 +++++++++++++++++++++++++++++++++---------
 1 file changed, 33 insertions(+), 9 deletions(-)

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 19fea9e..efc190c 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -1056,9 +1056,42 @@ static struct attribute_group thermal_zone_mode_attribute_group = {
 	.is_visible = thermal_zone_mode_is_visible,
 };
 
+/* We expose passive only if passive trips are present */
+static struct attribute *thermal_zone_passive_attrs[] = {
+	&dev_attr_passive.attr,
+	NULL,
+};
+
+static umode_t thermal_zone_passive_is_visible(struct kobject *kobj,
+					       struct attribute *attr,
+					       int attrno)
+{
+	struct device *dev = container_of(kobj, struct device, kobj);
+	struct thermal_zone_device *tz;
+	enum thermal_trip_type trip_type;
+	int count;
+
+	tz = container_of(dev, struct thermal_zone_device, device);
+
+	for (count = 0; count < tz->trips; count++) {
+		tz->ops->get_trip_type(tz, count, &trip_type);
+
+		if (trip_type == THERMAL_TRIP_PASSIVE)
+			return attr->mode;
+	}
+
+	return 0;
+}
+
+static struct attribute_group thermal_zone_passive_attribute_group = {
+	.attrs = thermal_zone_passive_attrs,
+	.is_visible = thermal_zone_passive_is_visible,
+};
+
 static const struct attribute_group *thermal_zone_attribute_groups[] = {
 	&thermal_zone_attribute_group,
 	&thermal_zone_mode_attribute_group,
+	&thermal_zone_passive_attribute_group,
 	NULL
 };
 
@@ -1843,7 +1876,6 @@ struct thermal_zone_device *thermal_zone_device_register(const char *type,
 	int trip_temp;
 	int result;
 	int count;
-	int passive = 0;
 	struct thermal_governor *governor;
 
 	if (!type || strlen(type) == 0)
@@ -1904,8 +1936,6 @@ struct thermal_zone_device *thermal_zone_device_register(const char *type,
 	for (count = 0; count < trips; count++) {
 		if (tz->ops->get_trip_type(tz, count, &trip_type))
 			set_bit(count, &tz->trips_disabled);
-		if (trip_type == THERMAL_TRIP_PASSIVE)
-			passive = 1;
 		if (tz->ops->get_trip_temp(tz, count, &trip_temp))
 			set_bit(count, &tz->trips_disabled);
 		/* Check for bogus trip points */
@@ -1913,12 +1943,6 @@ struct thermal_zone_device *thermal_zone_device_register(const char *type,
 			set_bit(count, &tz->trips_disabled);
 	}
 
-	if (!passive) {
-		result = device_create_file(&tz->device, &dev_attr_passive);
-		if (result)
-			goto unregister;
-	}
-
 	/* Update 'this' zone's governor information */
 	mutex_lock(&thermal_governor_lock);
 
-- 
2.1.4