iio: light: opt3001: Fixed timeout error when 0 lux

commit 26d90b5590579def54382a2fc34cfbe8518a9851 upstream.

Reading from sensor returned timeout error under
zero light conditions.

Signed-off-by: Jiri Valek - 2N <valek@2n.cz>
Fixes: 52f0a68c9d69 ("iio: light: opt3001: enable operation w/o IRQ")
Link: https://lore.kernel.org/r/20210920125351.6569-1-valek@2n.cz
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/iio/light/opt3001.c b/drivers/iio/light/opt3001.c
index 92004a2563ea80b910733b657bf10b9be206537f..5588066c832466c9ce7caaf02ccb2defea749b22 100644 (file)
--- a/drivers/iio/light/opt3001.c
+++ b/drivers/iio/light/opt3001.c
@@ -275,6 +275,8 @@ static int opt3001_get_lux(struct opt3001 *opt, int *val, int *val2)
                ret = wait_event_timeout(opt->result_ready_queue,
                                opt->result_ready,
                                msecs_to_jiffies(OPT3001_RESULT_READY_LONG));
+               if (ret == 0)
+                       return -ETIMEDOUT;
        } else {
                /* Sleep for result ready time */
                timeout = (opt->int_time == OPT3001_INT_TIME_SHORT) ?
@@ -311,9 +313,7 @@ err:
                /* Disallow IRQ to access the device while lock is active */
                opt->ok_to_ignore_lock = false;
 
-       if (ret == 0)
-               return -ETIMEDOUT;
-       else if (ret < 0)
+       if (ret < 0)
                return ret;
 
        if (opt->use_irq) {