From 14ee64f438b8e85d1c78939d301956d9a775cc9a Mon Sep 17 00:00:00 2001 From: Octavian Purdila Date: Sat, 31 Jan 2015 02:00:05 +0200 Subject: [PATCH] iio: bmc150: exit early if event / trigger state is not changed Previous of this patch the check was only done if we enabled the event and it was already enabled. We can do the same if the event is disabled and we want to disable it. The patch also adds the same check on the trigger code. Signed-off-by: Octavian Purdila Acked-by: Srinivas Pandruvada Signed-off-by: Jonathan Cameron --- drivers/iio/accel/bmc150-accel.c | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) diff --git a/drivers/iio/accel/bmc150-accel.c b/drivers/iio/accel/bmc150-accel.c index 087392514e54..f040f405d826 100644 --- a/drivers/iio/accel/bmc150-accel.c +++ b/drivers/iio/accel/bmc150-accel.c @@ -748,7 +748,7 @@ static int bmc150_accel_write_event_config(struct iio_dev *indio_dev, struct bmc150_accel_data *data = iio_priv(indio_dev); int ret; - if (state && data->ev_enable_state) + if (state == data->ev_enable_state) return 0; mutex_lock(&data->mutex); @@ -984,6 +984,18 @@ static int bmc150_accel_data_rdy_trigger_set_state(struct iio_trigger *trig, mutex_lock(&data->mutex); + if (data->motion_trig == trig) { + if (data->motion_trigger_on == state) { + mutex_unlock(&data->mutex); + return 0; + } + } else { + if (data->dready_trigger_on == state) { + mutex_unlock(&data->mutex); + return 0; + } + } + if (!state && data->ev_enable_state && data->motion_trigger_on) { data->motion_trigger_on = false; mutex_unlock(&data->mutex); -- 2.39.2