iio: light: apds9960: correct FIFO check condition

Correct issue that the last entry in FIFO was being read twice due
to an incorrect decrement of entry count variable before condition
check.

Signed-off-by: Matt Ranostay <mranostay@gmail.com>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/iio/light/apds9960.c b/drivers/iio/light/apds9960.c
index f6a07dc32ae4..a6af56ad10e1 100644
--- a/drivers/iio/light/apds9960.c
+++ b/drivers/iio/light/apds9960.c
@@ -769,7 +769,7 @@ static void apds9960_read_gesture_fifo(struct apds9960_data *data)
         mutex_lock(&data->lock);
         data->gesture_mode_running = 1;
 
-        while (cnt-- || (cnt = apds9660_fifo_is_empty(data) > 0)) {
+        while (cnt || (cnt = apds9660_fifo_is_empty(data) > 0)) {
                 ret = regmap_bulk_read(data->regmap, APDS9960_REG_GFIFO_BASE,
                                       &data->buffer, 4);
 
@@ -777,6 +777,7 @@ static void apds9960_read_gesture_fifo(struct apds9960_data *data)
                         goto err_read;
 
                 iio_push_to_buffers(data->indio_dev, data->buffer);
+                cnt--;
         }
 
 err_read: