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| author | Martin Kelly <mkelly@xevo.com> | 2018-05-01 10:56:42 -0700 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2018-05-12 10:01:41 +0100 |
| commit | cbf73ae59bee340f423479eb48aef9a0efdd8010 (patch) | |
| tree | 1b0ff30e17ab41169488eeb17435d2cbf83f06a8 /drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c | |
| parent | 21f4bb8756b22853ae3555f73ab8a44d328ee423 (diff) | |
| download | linux-stable-cbf73ae59bee340f423479eb48aef9a0efdd8010.tar.gz linux-stable-cbf73ae59bee340f423479eb48aef9a0efdd8010.tar.bz2 linux-stable-cbf73ae59bee340f423479eb48aef9a0efdd8010.zip | |
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 <mkelly@xevo.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c')
| -rw-r--r-- | drivers/iio/imu/inv_mpu6050/inv_mpu_ring.c | 4 |
1 files changed, 2 insertions, 2 deletions
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); |