[PATCH 4.14 23/39] iio: light: opt3001: Fixed timeout error when 0 lux

Greg Kroah-Hartman
2021-10-18T13:27:15Z

From: Jiri Valek - 2N <valek@2n.cz>

commit 26d90b5590579def54382a2fc34cfbe8518a9851 upstream.

Reading from sensor returned timeout error under
zero light conditions.

Signed-off-by: Jiri Valek - 2N <valek@2n.cz>
Fixes: ac663db3678a ("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>
---
drivers/iio/light/opt3001.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

--- a/drivers/iio/light/opt3001.c
+++ b/drivers/iio/light/opt3001.c
@@ -283,6 +283,8 @@ static int opt3001_get_lux(struct opt300
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) ?
@@ -319,9 +321,7 @@ 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) {