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iio: imu: inv_mpu6050: make loop a do-while

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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 <mkelly@xevo.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Martin Kelly 2018-05-01 10:56:42 -07:00 committed by Jonathan Cameron
parent 21f4bb8756
commit cbf73ae59b
1 changed files with 2 additions and 2 deletions
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4
drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c
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@ -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);