From a2fa9242e89f27696515699fe0f0296bf1ac1815 Mon Sep 17 00:00:00 2001
From: Dinghao Liu <dinghao.liu@zju.edu.cn>
Date: Mon, 12 Apr 2021 13:32:02 +0800
Subject: [PATCH] iio: proximity: pulsedlight: Fix rumtime PM imbalance on error
Git-commit: a2fa9242e89f27696515699fe0f0296bf1ac1815
Patch-mainline: v5.13-rc2
References: git-fixes

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.liu@zju.edu.cn>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20210412053204.4889-1-dinghao.liu@zju.edu.cn
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 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;
 	}
 
-- 
2.26.2