diff --git a/drivers/iio/accel/adxl380.c b/drivers/iio/accel/adxl380.c
index ba550142866a..a77c2323d1aa 100644
--- a/drivers/iio/accel/adxl380.c
+++ b/drivers/iio/accel/adxl380.c
@@ -966,6 +966,7 @@ static irqreturn_t adxl380_irq_handler(int irq, void  *p)
 	if (ret)
 		return IRQ_HANDLED;
 
+	fifo_entries = rounddown(fifo_entries, st->fifo_set_size);
 	for (i = 0; i < fifo_entries; i += st->fifo_set_size) {
 		ret = regmap_noinc_read(st->regmap, ADXL380_FIFO_DATA,
 					&st->fifo_buf[i],