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Subject: [PATCH v7 09/11] thermal: core: Stop polling DISABLED thermal devices
Date:   Mon, 29 Jun 2020 14:29:23 +0200
Message-Id: <20200629122925.21729-10-andrzej.p@collabora.com>
In-Reply-To: <20200629122925.21729-1-andrzej.p@collabora.com>
References: <20200629122925.21729-1-andrzej.p@collabora.com>
Sender: linux-wireless-owner@vger.kernel.org
Precedence: bulk

Polling DISABLED devices is not desired, as all such "disabled" devices
are meant to be handled by userspace. This patch introduces and uses
should_stop_polling() to decide whether the device should be polled or not.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
Reviewed-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
---
 drivers/thermal/thermal_core.c | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c
index 52d136780577..e613f5c07bad 100644
--- a/drivers/thermal/thermal_core.c
+++ b/drivers/thermal/thermal_core.c
@@ -301,13 +301,22 @@ static void thermal_zone_device_set_polling(struct thermal_zone_device *tz,
 		cancel_delayed_work(&tz->poll_queue);
 }
 
+static inline bool should_stop_polling(struct thermal_zone_device *tz)
+{
+	return !thermal_zone_device_is_enabled(tz);
+}
+
 static void monitor_thermal_zone(struct thermal_zone_device *tz)
 {
+	bool stop;
+
+	stop = should_stop_polling(tz);
+
 	mutex_lock(&tz->lock);
 
-	if (tz->passive)
+	if (!stop && tz->passive)
 		thermal_zone_device_set_polling(tz, tz->passive_delay);
-	else if (tz->polling_delay)
+	else if (!stop && tz->polling_delay)
 		thermal_zone_device_set_polling(tz, tz->polling_delay);
 	else
 		thermal_zone_device_set_polling(tz, 0);
@@ -517,6 +526,9 @@ void thermal_zone_device_update(struct thermal_zone_device *tz,
 {
 	int count;
 
+	if (should_stop_polling(tz))
+		return;
+
 	if (atomic_read(&in_suspend))
 		return;
 
-- 
2.17.1