[PATCH] [v2] iio: proximity: pulsedlight: Fix rumtime PM imbalance on error

[Dinghao Liu]

When lidar_write_control() fails, a pairing PM usage counter
decrement is needed to keep the counter balanced.

Fixes: 4ac4e086fd8c5 ("iio: pulsedlight-lidar-lite: add runtime PM")
Signed-off-by: Dinghao Liu <dinghao....@zju.edu.cn>
---

Changelog:

v2: - Add the fix tag.
---
 drivers/iio/proximity/pulsedlight-lidar-lite-v2.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/iio/proximity/pulsedlight-lidar-lite-v2.c 
b/drivers/iio/proximity/pulsedlight-lidar-lite-v2.c
index c685f10b5ae4..cc206bfa09c7 100644
--- a/drivers/iio/proximity/pulsedlight-lidar-lite-v2.c
+++ b/drivers/iio/proximity/pulsedlight-lidar-lite-v2.c
@@ -160,6 +160,7 @@ static int lidar_get_measurement(struct lidar_data *data, 
u16 *reg)
        ret = lidar_write_control(data, LIDAR_REG_CONTROL_ACQUIRE);
        if (ret < 0) {
                dev_err(&client->dev, "cannot send start measurement command");
+               pm_runtime_put_noidle(&client->dev);
                return ret;
        }
 
-- 
2.17.1