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    Subject[PATCH 5.10 224/289] iio: proximity: pulsedlight: Fix rumtime PM imbalance on error
    Date
    From: Dinghao Liu <dinghao.liu@zju.edu.cn>

    [ Upstream commit a2fa9242e89f27696515699fe0f0296bf1ac1815 ]

    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>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    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;
    }

    --
    2.30.2


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