From cbf73ae59bee340f423479eb48aef9a0efdd8010 Mon Sep 17 00:00:00 2001 From: Martin Kelly Date: Tue, 1 May 2018 10:56:42 -0700 Subject: iio: imu: inv_mpu6050: make loop a do-while Prior to this loop, we check if fifo_count < bytes_per_datum and bail if so. This means that when we hit the loop, we know that fifo_count >= bytes_per_datum, so the check is unneeded and we can turn the loop into a do-while for a slight performance improvement. Signed-off-by: Martin Kelly Signed-off-by: Jonathan Cameron --- drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c b/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c index 97d965181635..1795418438e4 100644 --- a/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c +++ b/drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c @@ -175,7 +175,7 @@ irqreturn_t inv_mpu6050_read_fifo(int irq, void *p) if (kfifo_len(&st->timestamps) > fifo_count / bytes_per_datum + INV_MPU6050_TIME_STAMP_TOR) goto flush_fifo; - while (fifo_count >= bytes_per_datum) { + do { result = regmap_bulk_read(st->map, st->reg->fifo_r_w, data, bytes_per_datum); if (result) @@ -194,7 +194,7 @@ irqreturn_t inv_mpu6050_read_fifo(int irq, void *p) timestamp); fifo_count -= bytes_per_datum; - } + } while (fifo_count >= bytes_per_datum); end_session: mutex_unlock(&st->lock); -- cgit v1.2.3-59-g8ed1b