[PATCH] iio: chemical: atlas-sensor: fix PM reference leak in buffer postenable

[Moksh Panicker]

atlas_buffer_postenable() acquires a runtime PM reference with
pm_runtime_resume_and_get() but returns the result of
atlas_set_interrupt() directly. If atlas_set_interrupt() fails,
the runtime PM reference is leaked and the device can never
autosuspend.

Add pm_runtime_put_autosuspend() on the error path to balance
the reference.

Fixes: 0e4f336f50de ("iio: chemical: atlas-sensor: Balance runtime pm + pm_runtime_resume_and_get()")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Moksh Panicker <mokshpanicker.7@xxxxxxxxx>
---
 drivers/iio/chemical/atlas-sensor.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/chemical/atlas-sensor.c b/drivers/iio/chemical/atlas-sensor.c
index 0e2edcff63f9..b2c1a598b3a5 100644
--- a/drivers/iio/chemical/atlas-sensor.c
+++ b/drivers/iio/chemical/atlas-sensor.c
@@ -413,7 +413,11 @@ static int atlas_buffer_postenable(struct iio_dev *indio_dev)
 	if (ret)
 		return ret;
 
-	return atlas_set_interrupt(data, true);
+	ret = atlas_set_interrupt(data, true);
+	if (ret)
+		pm_runtime_put_autosuspend(&data->client->dev);
+
+	return ret;
 }
 
 static int atlas_buffer_predisable(struct iio_dev *indio_dev)
-- 
2.34.1