[PATCH] iio: adc: ti-ads1015: use devm_pm_runtime_enable() to fix probe error path

[Stepan Ionichev <sozdayvek@gmail.com>]

ads1015_probe() calls pm_runtime_enable() and then iio_device_register().
If iio_device_register() fails the function returns directly, leaving
runtime PM enabled and autosuspend in use. On subsequent probe/rebind
the runtime PM tracking complains about an unbalanced enable.

Switch to devm_pm_runtime_enable() so the enable (and the matching
dont_use_autosuspend) are torn down automatically on probe failure and
on driver unbind. The manual pm_runtime_disable() and
pm_runtime_set_suspended() calls in ads1015_remove() are no longer
needed and are dropped; the devm action runs after .remove() and now
handles the teardown. While here, convert the dev_err() + return to
dev_err_probe() to follow current style.

Signed-off-by: Stepan Ionichev <sozdayvek@gmail.com>
---
 drivers/iio/adc/ti-ads1015.c | 14 ++++++--------
 1 file changed, 6 insertions(+), 8 deletions(-)

diff --git a/drivers/iio/adc/ti-ads1015.c b/drivers/iio/adc/ti-ads1015.c
index c7ffe47449e2..2331e946c519 100644
--- a/drivers/iio/adc/ti-ads1015.c
+++ b/drivers/iio/adc/ti-ads1015.c
@@ -1037,13 +1037,14 @@ static int ads1015_probe(struct i2c_client *client)
 		return ret;
 	pm_runtime_set_autosuspend_delay(&client->dev, ADS1015_SLEEP_DELAY_MS);
 	pm_runtime_use_autosuspend(&client->dev);
-	pm_runtime_enable(&client->dev);
+	ret = devm_pm_runtime_enable(&client->dev);
+	if (ret)
+		return ret;
 
 	ret = iio_device_register(indio_dev);
-	if (ret < 0) {
-		dev_err(&client->dev, "Failed to register IIO device\n");
-		return ret;
-	}
+	if (ret < 0)
+		return dev_err_probe(&client->dev, ret,
+				     "Failed to register IIO device\n");
 
 	return 0;
 }
@@ -1056,9 +1057,6 @@ static void ads1015_remove(struct i2c_client *client)
 
 	iio_device_unregister(indio_dev);
 
-	pm_runtime_disable(&client->dev);
-	pm_runtime_set_suspended(&client->dev);
-
 	/* power down single shot mode */
 	ret = ads1015_set_conv_mode(data, ADS1015_SINGLESHOT);
 	if (ret)
-- 
2.43.0