From e031d5f558f1535968df1ecae8d734b84c17f78d Mon Sep 17 00:00:00 2001 From: Denis Ciocca Date: Mon, 5 Aug 2019 11:57:11 -0700 Subject: iio:st_sensors: remove buffer allocation at each buffer enable This patch is removing the buffer allocation at each buffer enable. We just allocate enough memory in the main structure during probe to cover maximum size needed (that anyway is pretty small) [16bytes]. Signed-off-by: Denis Ciocca Signed-off-by: Jonathan Cameron --- drivers/iio/gyro/st_gyro_buffer.c | 12 +----------- 1 file changed, 1 insertion(+), 11 deletions(-) (limited to 'drivers/iio/gyro') diff --git a/drivers/iio/gyro/st_gyro_buffer.c b/drivers/iio/gyro/st_gyro_buffer.c index c6ddfecc1fc3..7465ad62391c 100644 --- a/drivers/iio/gyro/st_gyro_buffer.c +++ b/drivers/iio/gyro/st_gyro_buffer.c @@ -31,17 +31,11 @@ int st_gyro_trig_set_state(struct iio_trigger *trig, bool state) static int st_gyro_buffer_postenable(struct iio_dev *indio_dev) { - struct st_sensor_data *gdata = iio_priv(indio_dev); int err; - gdata->buffer_data = kmalloc(indio_dev->scan_bytes, - GFP_DMA | GFP_KERNEL); - if (!gdata->buffer_data) - return -ENOMEM; - err = iio_triggered_buffer_postenable(indio_dev); if (err < 0) - goto st_gyro_free_buffer; + return err; err = st_sensors_set_axis_enable(indio_dev, (u8)indio_dev->active_scan_mask[0]); @@ -58,15 +52,12 @@ st_gyro_buffer_enable_all_axis: st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS); st_gyro_buffer_predisable: iio_triggered_buffer_predisable(indio_dev); -st_gyro_free_buffer: - kfree(gdata->buffer_data); return err; } static int st_gyro_buffer_predisable(struct iio_dev *indio_dev) { int err, err2; - struct st_sensor_data *gdata = iio_priv(indio_dev); err = st_sensors_set_enable(indio_dev, false); if (err < 0) @@ -79,7 +70,6 @@ st_gyro_buffer_predisable: if (!err) err = err2; - kfree(gdata->buffer_data); return err; } -- cgit