iio: hid: trigger: Balance runtime pm + use pm_runtime_resume_and_get()

The call to pm_runtime_put_noidle() in remove() callback is not
balanced by any gets

Note this doesn't cause any problems beyond reader confusion as the runtime
pm core protects against the reference counter going negative.

Whilst here, use pm_runtiem_resume_and_get() to simplify code a little.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Reviewed-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Link: https://lore.kernel.org/r/20210509113354.660190-9-jic23@kernel.org

diff --git a/drivers/iio/common/hid-sensors/hid-sensor-trigger.c b/drivers/iio/common/hid-sensors/hid-sensor-trigger.c
index 5a7b3e2..c06537e 100644 (file)
--- a/drivers/iio/common/hid-sensors/hid-sensor-trigger.c
+++ b/drivers/iio/common/hid-sensors/hid-sensor-trigger.c
@@ -163,18 +163,15 @@ int hid_sensor_power_state(struct hid_sensor_common *st, bool state)
 
        if (state) {
                atomic_inc(&st->user_requested_state);
-               ret = pm_runtime_get_sync(&st->pdev->dev);
+               ret = pm_runtime_resume_and_get(&st->pdev->dev);
        } else {
                atomic_dec(&st->user_requested_state);
                pm_runtime_mark_last_busy(&st->pdev->dev);
                pm_runtime_use_autosuspend(&st->pdev->dev);
                ret = pm_runtime_put_autosuspend(&st->pdev->dev);
        }
-       if (ret < 0) {
-               if (state)
-                       pm_runtime_put_noidle(&st->pdev->dev);
+       if (ret < 0)
                return ret;
-       }
 
        return 0;
 #else
@@ -222,7 +219,6 @@ void hid_sensor_remove_trigger(struct iio_dev *indio_dev,
                pm_runtime_disable(&attrb->pdev->dev);
 
        pm_runtime_set_suspended(&attrb->pdev->dev);
-       pm_runtime_put_noidle(&attrb->pdev->dev);
 
        cancel_work_sync(&attrb->work);
        iio_trigger_unregister(attrb->trigger);