iio: Move attach/detach of the poll func to the core

All devices using a triggered buffer need to attach and detach the trigger
to the device in order to properly work. Instead of doing this in each and
every driver by hand move this into the core.

At this point in time, all drivers should have been resolved to
attach/detach the poll-function in the same order.

This patch removes all explicit calls of iio_triggered_buffer_postenable()
& iio_triggered_buffer_predisable() in all drivers, since the core handles
now the pollfunc attach/detach.

The more peculiar change is for the 'at91-sama5d2_adc' driver, since it's
not immediately obvious that removing the hooks doesn't break anything.
Eugen was able to test on at91-sama5d2-adc driver, sama5d2-xplained board.
All seems to be fine.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Tested-by: Eugen Hristev <eugen.hristev@microchip.com> #for at91-sama5d2-adc
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/accel/adxl372.c

@@ -795,13 +795,9 @@ static int adxl372_buffer_postenable(struct iio_dev *indio_dev)
 	unsigned int mask;
 	int i, ret;
 
-	ret = iio_triggered_buffer_postenable(indio_dev);
-	if (ret < 0)
-		return ret;
-
 	ret = adxl372_set_interrupts(st, ADXL372_INT1_MAP_FIFO_FULL_MSK, 0);
 	if (ret < 0)
-		goto err;
+		return ret;
 
 	mask = *indio_dev->active_scan_mask;
 
@@ -810,10 +806,8 @@ static int adxl372_buffer_postenable(struct iio_dev *indio_dev)
 			break;
 	}
 
-	if (i == ARRAY_SIZE(adxl372_axis_lookup_table)) {
-		ret = -EINVAL;
-		goto err;
-	}
+	if (i == ARRAY_SIZE(adxl372_axis_lookup_table))
+		return -EINVAL;
 
 	st->fifo_format = adxl372_axis_lookup_table[i].fifo_format;
 	st->fifo_set_size = bitmap_weight(indio_dev->active_scan_mask,
@@ -833,14 +827,10 @@ static int adxl372_buffer_postenable(struct iio_dev *indio_dev)
 	if (ret < 0) {
 		st->fifo_mode = ADXL372_FIFO_BYPASSED;
 		adxl372_set_interrupts(st, 0, 0);
-		goto err;
+		return ret;
 	}
 
 	return 0;
-
-err:
-	iio_triggered_buffer_predisable(indio_dev);
-	return ret;
 }
 
 static int adxl372_buffer_predisable(struct iio_dev *indio_dev)
@@ -851,7 +841,7 @@ static int adxl372_buffer_predisable(struct iio_dev *indio_dev)
 	st->fifo_mode = ADXL372_FIFO_BYPASSED;
 	adxl372_configure_fifo(st);
 
-	return iio_triggered_buffer_predisable(indio_dev);
+	return 0;
 }
 
 static const struct iio_buffer_setup_ops adxl372_buffer_ops = {

drivers/iio/accel/bmc150-accel-core.c

@@ -1411,7 +1411,7 @@ static int bmc150_accel_buffer_postenable(struct iio_dev *indio_dev)
 	int ret = 0;
 
 	if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED)
-		return iio_triggered_buffer_postenable(indio_dev);
+		return 0;
 
 	mutex_lock(&data->mutex);
 
@@ -1443,7 +1443,7 @@ static int bmc150_accel_buffer_predisable(struct iio_dev *indio_dev)
 	struct bmc150_accel_data *data = iio_priv(indio_dev);
 
 	if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED)
-		return iio_triggered_buffer_predisable(indio_dev);
+		return 0;
 
 	mutex_lock(&data->mutex);
 

drivers/iio/accel/kxcjk-1013.c

@@ -1027,9 +1027,7 @@ static const struct iio_chan_spec kxcjk1013_channels[] = {
 
 static const struct iio_buffer_setup_ops kxcjk1013_buffer_setup_ops = {
 	.preenable		= kxcjk1013_buffer_preenable,
-	.postenable		= iio_triggered_buffer_postenable,
 	.postdisable		= kxcjk1013_buffer_postdisable,
-	.predisable		= iio_triggered_buffer_predisable,
 };
 
 static const struct iio_info kxcjk1013_info = {

drivers/iio/accel/kxsd9.c

@@ -252,8 +252,6 @@ static int kxsd9_buffer_postdisable(struct iio_dev *indio_dev)
 
 static const struct iio_buffer_setup_ops kxsd9_buffer_setup_ops = {
 	.preenable = kxsd9_buffer_preenable,
-	.postenable = iio_triggered_buffer_postenable,
-	.predisable = iio_triggered_buffer_predisable,
 	.postdisable = kxsd9_buffer_postdisable,
 };
 

drivers/iio/accel/st_accel_buffer.c

@@ -33,13 +33,9 @@ static int st_accel_buffer_postenable(struct iio_dev *indio_dev)
 {
 	int err;
 
-	err = iio_triggered_buffer_postenable(indio_dev);
-	if (err < 0)
-		return err;
-
 	err = st_sensors_set_axis_enable(indio_dev, indio_dev->active_scan_mask[0]);
 	if (err < 0)
-		goto st_accel_buffer_predisable;
+		return err;
 
 	err = st_sensors_set_enable(indio_dev, true);
 	if (err < 0)
@@ -49,27 +45,19 @@ static int st_accel_buffer_postenable(struct iio_dev *indio_dev)
 
 st_accel_buffer_enable_all_axis:
 	st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS);
-st_accel_buffer_predisable:
-	iio_triggered_buffer_predisable(indio_dev);
 	return err;
 }
 
 static int st_accel_buffer_predisable(struct iio_dev *indio_dev)
 {
-	int err, err2;
+	int err;
 
 	err = st_sensors_set_enable(indio_dev, false);
 	if (err < 0)
-		goto st_accel_buffer_predisable;
-
-	err = st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS);
-
-st_accel_buffer_predisable:
-	err2 = iio_triggered_buffer_predisable(indio_dev);
-	if (!err)
-		err = err2;
-
 		return err;
+
+	return st_sensors_set_axis_enable(indio_dev,
+					  ST_SENSORS_ENABLE_ALL_AXIS);
 }
 
 static const struct iio_buffer_setup_ops st_accel_buffer_setup_ops = {

drivers/iio/accel/stk8312.c

@@ -492,8 +492,6 @@ static int stk8312_buffer_postdisable(struct iio_dev *indio_dev)
 
 static const struct iio_buffer_setup_ops stk8312_buffer_setup_ops = {
 	.preenable   = stk8312_buffer_preenable,
-	.postenable  = iio_triggered_buffer_postenable,
-	.predisable  = iio_triggered_buffer_predisable,
 	.postdisable = stk8312_buffer_postdisable,
 };
 

drivers/iio/accel/stk8ba50.c

@@ -376,8 +376,6 @@ static int stk8ba50_buffer_postdisable(struct iio_dev *indio_dev)
 
 static const struct iio_buffer_setup_ops stk8ba50_buffer_setup_ops = {
 	.preenable   = stk8ba50_buffer_preenable,
-	.postenable  = iio_triggered_buffer_postenable,
-	.predisable  = iio_triggered_buffer_predisable,
 	.postdisable = stk8ba50_buffer_postdisable,
 };
 

drivers/iio/adc/ad7266.c

@@ -74,8 +74,6 @@ static int ad7266_postdisable(struct iio_dev *indio_dev)
 
 static const struct iio_buffer_setup_ops iio_triggered_buffer_setup_ops = {
 	.preenable = &ad7266_preenable,
-	.postenable = &iio_triggered_buffer_postenable,
-	.predisable = &iio_triggered_buffer_predisable,
 	.postdisable = &ad7266_postdisable,
 };
 

drivers/iio/adc/ad7606.c

@@ -499,7 +499,6 @@ static int ad7606_buffer_postenable(struct iio_dev *indio_dev)
 {
 	struct ad7606_state *st = iio_priv(indio_dev);
 
-	iio_triggered_buffer_postenable(indio_dev);
 	gpiod_set_value(st->gpio_convst, 1);
 
 	return 0;
@@ -511,7 +510,7 @@ static int ad7606_buffer_predisable(struct iio_dev *indio_dev)
 
 	gpiod_set_value(st->gpio_convst, 0);
 
-	return iio_triggered_buffer_predisable(indio_dev);
+	return 0;
 }
 
 static const struct iio_buffer_setup_ops ad7606_buffer_ops = {

drivers/iio/adc/ad7766.c

@@ -178,8 +178,6 @@ static const struct ad7766_chip_info ad7766_chip_info[] = {
 
 static const struct iio_buffer_setup_ops ad7766_buffer_setup_ops = {
 	.preenable = &ad7766_preenable,
-	.postenable = &iio_triggered_buffer_postenable,
-	.predisable = &iio_triggered_buffer_predisable,
 	.postdisable = &ad7766_postdisable,
 };
 

drivers/iio/adc/ad7768-1.c

@@ -490,7 +490,6 @@ static int ad7768_buffer_postenable(struct iio_dev *indio_dev)
 {
 	struct ad7768_state *st = iio_priv(indio_dev);
 
-	iio_triggered_buffer_postenable(indio_dev);
 	/*
 	 * Write a 1 to the LSB of the INTERFACE_FORMAT register to enter
 	 * continuous read mode. Subsequent data reads do not require an
@@ -502,17 +501,12 @@ static int ad7768_buffer_postenable(struct iio_dev *indio_dev)
 static int ad7768_buffer_predisable(struct iio_dev *indio_dev)
 {
 	struct ad7768_state *st = iio_priv(indio_dev);
-	int ret;
 
 	/*
 	 * To exit continuous read mode, perform a single read of the ADC_DATA
 	 * reg (0x2C), which allows further configuration of the device.
 	 */
-	ret = ad7768_spi_reg_read(st, AD7768_REG_ADC_DATA, 3);
-	if (ret < 0)
-		return ret;
-
-	return iio_triggered_buffer_predisable(indio_dev);
+	return ad7768_spi_reg_read(st, AD7768_REG_ADC_DATA, 3);
 }
 
 static const struct iio_buffer_setup_ops ad7768_buffer_ops = {

drivers/iio/adc/ad7887.c

@@ -136,8 +136,6 @@ static irqreturn_t ad7887_trigger_handler(int irq, void *p)
 
 static const struct iio_buffer_setup_ops ad7887_ring_setup_ops = {
 	.preenable = &ad7887_ring_preenable,
-	.postenable = &iio_triggered_buffer_postenable,
-	.predisable = &iio_triggered_buffer_predisable,
 	.postdisable = &ad7887_ring_postdisable,
 };
 

drivers/iio/adc/ad_sigma_delta.c

@@ -345,10 +345,6 @@ static int ad_sd_buffer_postenable(struct iio_dev *indio_dev)
 	unsigned int channel;
 	int ret;
 
-	ret = iio_triggered_buffer_postenable(indio_dev);
-	if (ret < 0)
-		return ret;
-
 	channel = find_first_bit(indio_dev->active_scan_mask,
 				 indio_dev->masklength);
 	ret = ad_sigma_delta_set_channel(sigma_delta,
@@ -441,7 +437,6 @@ static irqreturn_t ad_sd_trigger_handler(int irq, void *p)
 
 static const struct iio_buffer_setup_ops ad_sd_buffer_setup_ops = {
 	.postenable = &ad_sd_buffer_postenable,
-	.predisable = &iio_triggered_buffer_predisable,
 	.postdisable = &ad_sd_buffer_postdisable,
 	.validate_scan_mask = &iio_validate_scan_mask_onehot,
 };

drivers/iio/adc/at91-sama5d2_adc.c

@@ -937,14 +937,6 @@ static int at91_adc_buffer_preenable(struct iio_dev *indio_dev)
 	return 0;
 }
 
-static int at91_adc_buffer_postenable(struct iio_dev *indio_dev)
-{
-	if (at91_adc_current_chan_is_touch(indio_dev))
-		return 0;
-
-	return iio_triggered_buffer_postenable(indio_dev);
-}
-
 static int at91_adc_buffer_postdisable(struct iio_dev *indio_dev)
 {
 	struct at91_adc_state *st = iio_priv(indio_dev);
@@ -995,19 +987,9 @@ static int at91_adc_buffer_postdisable(struct iio_dev *indio_dev)
 	return 0;
 }
 
-static int at91_adc_buffer_predisable(struct iio_dev *indio_dev)
-{
-	if (at91_adc_current_chan_is_touch(indio_dev))
-		return 0;
-
-	return iio_triggered_buffer_predisable(indio_dev);
-}
-
 static const struct iio_buffer_setup_ops at91_buffer_setup_ops = {
 	.preenable = &at91_adc_buffer_preenable,
 	.postdisable = &at91_adc_buffer_postdisable,
-	.postenable = &at91_adc_buffer_postenable,
-	.predisable = &at91_adc_buffer_predisable,
 };
 
 static struct iio_trigger *at91_adc_allocate_trigger(struct iio_dev *indio,

drivers/iio/adc/dln2-adc.c

@@ -524,10 +524,6 @@ static int dln2_adc_triggered_buffer_postenable(struct iio_dev *indio_dev)
 	u16 conflict;
 	unsigned int trigger_chan;
 
-	ret = iio_triggered_buffer_postenable(indio_dev);
-	if (ret)
-		return ret;
-
 	mutex_lock(&dln2->mutex);
 
 	/* Enable ADC */
@@ -541,7 +537,6 @@ static int dln2_adc_triggered_buffer_postenable(struct iio_dev *indio_dev)
 				(int)conflict);
 			ret = -EBUSY;
 		}
-		iio_triggered_buffer_predisable(indio_dev);
 		return ret;
 	}
 
@@ -555,7 +550,6 @@ static int dln2_adc_triggered_buffer_postenable(struct iio_dev *indio_dev)
 		mutex_unlock(&dln2->mutex);
 		if (ret < 0) {
 			dev_dbg(&dln2->pdev->dev, "Problem in %s\n", __func__);
-			iio_triggered_buffer_predisable(indio_dev);
 			return ret;
 		}
 	} else {
@@ -568,7 +562,7 @@ static int dln2_adc_triggered_buffer_postenable(struct iio_dev *indio_dev)
 
 static int dln2_adc_triggered_buffer_predisable(struct iio_dev *indio_dev)
 {
-	int ret, ret2;
+	int ret;
 	struct dln2_adc *dln2 = iio_priv(indio_dev);
 
 	mutex_lock(&dln2->mutex);
@@ -586,10 +580,6 @@ static int dln2_adc_triggered_buffer_predisable(struct iio_dev *indio_dev)
 	if (ret < 0)
 		dev_dbg(&dln2->pdev->dev, "Problem in %s\n", __func__);
 
-	ret2 = iio_triggered_buffer_predisable(indio_dev);
-	if (ret == 0)
-		ret = ret2;
-
 	return ret;
 }
 

drivers/iio/adc/mxs-lradc-adc.c

@@ -568,8 +568,6 @@ static bool mxs_lradc_adc_validate_scan_mask(struct iio_dev *iio,
 
 static const struct iio_buffer_setup_ops mxs_lradc_adc_buffer_ops = {
 	.preenable = &mxs_lradc_adc_buffer_preenable,
-	.postenable = &iio_triggered_buffer_postenable,
-	.predisable = &iio_triggered_buffer_predisable,
 	.postdisable = &mxs_lradc_adc_buffer_postdisable,
 	.validate_scan_mask = &mxs_lradc_adc_validate_scan_mask,
 };

drivers/iio/adc/stm32-adc.c

@@ -1492,7 +1492,7 @@ static int stm32_adc_dma_start(struct iio_dev *indio_dev)
 	return 0;
 }
 
-static int __stm32_adc_buffer_postenable(struct iio_dev *indio_dev)
+static int stm32_adc_buffer_postenable(struct iio_dev *indio_dev)
 {
 	struct stm32_adc *adc = iio_priv(indio_dev);
 	struct device *dev = indio_dev->dev.parent;
@@ -1537,22 +1537,7 @@ static int __stm32_adc_buffer_postenable(struct iio_dev *indio_dev)
 	return ret;
 }
 
-static int stm32_adc_buffer_postenable(struct iio_dev *indio_dev)
-{
-	int ret;
-
-	ret = iio_triggered_buffer_postenable(indio_dev);
-	if (ret < 0)
-		return ret;
-
-	ret = __stm32_adc_buffer_postenable(indio_dev);
-	if (ret < 0)
-		iio_triggered_buffer_predisable(indio_dev);
-
-	return ret;
-}
-
-static void __stm32_adc_buffer_predisable(struct iio_dev *indio_dev)
+static int stm32_adc_buffer_predisable(struct iio_dev *indio_dev)
 {
 	struct stm32_adc *adc = iio_priv(indio_dev);
 	struct device *dev = indio_dev->dev.parent;
@@ -1571,19 +1556,8 @@ static void __stm32_adc_buffer_predisable(struct iio_dev *indio_dev)
 
 	pm_runtime_mark_last_busy(dev);
 	pm_runtime_put_autosuspend(dev);
-}
-
-static int stm32_adc_buffer_predisable(struct iio_dev *indio_dev)
-{
-	int ret;
-
-	__stm32_adc_buffer_predisable(indio_dev);
-
-	ret = iio_triggered_buffer_predisable(indio_dev);
-	if (ret < 0)
-		dev_err(&indio_dev->dev, "predisable failed\n");
 
-	return ret;
+	return 0;
 }
 
 static const struct iio_buffer_setup_ops stm32_adc_buffer_setup_ops = {
@@ -2024,7 +1998,7 @@ static int stm32_adc_suspend(struct device *dev)
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
 
 	if (iio_buffer_enabled(indio_dev))
-		__stm32_adc_buffer_predisable(indio_dev);
+		stm32_adc_buffer_predisable(indio_dev);
 
 	return pm_runtime_force_suspend(dev);
 }
@@ -2046,7 +2020,7 @@ static int stm32_adc_resume(struct device *dev)
 	if (ret < 0)
 		return ret;
 
-	return __stm32_adc_buffer_postenable(indio_dev);
+	return stm32_adc_buffer_postenable(indio_dev);
 }
 #endif
 

drivers/iio/adc/stm32-dfsdm-adc.c

@@ -995,7 +995,7 @@ static int stm32_dfsdm_update_scan_mode(struct iio_dev *indio_dev,
 	return 0;
 }
 
-static int __stm32_dfsdm_postenable(struct iio_dev *indio_dev)
+static int stm32_dfsdm_postenable(struct iio_dev *indio_dev)
 {
 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);
 	int ret;
@@ -1038,30 +1038,7 @@ static int __stm32_dfsdm_postenable(struct iio_dev *indio_dev)
 	return ret;
 }
 
-static int stm32_dfsdm_postenable(struct iio_dev *indio_dev)
-{
-	int ret;
-
-	if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED) {
-		ret = iio_triggered_buffer_postenable(indio_dev);
-		if (ret < 0)
-			return ret;
-	}
-
-	ret = __stm32_dfsdm_postenable(indio_dev);
-	if (ret < 0)
-		goto err_predisable;
-
-	return 0;
-
-err_predisable:
-	if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED)
-		iio_triggered_buffer_predisable(indio_dev);
-
-	return ret;
-}
-
-static void __stm32_dfsdm_predisable(struct iio_dev *indio_dev)
+static int stm32_dfsdm_predisable(struct iio_dev *indio_dev)
 {
 	struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);
 
@@ -1073,14 +1050,6 @@ static void __stm32_dfsdm_predisable(struct iio_dev *indio_dev)
 
 	if (adc->hwc)
 		iio_hw_consumer_disable(adc->hwc);
-}
-
-static int stm32_dfsdm_predisable(struct iio_dev *indio_dev)
-{
-	__stm32_dfsdm_predisable(indio_dev);
-
-	if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED)
-		iio_triggered_buffer_predisable(indio_dev);
 
 	return 0;
 }
@@ -1668,7 +1637,7 @@ static int __maybe_unused stm32_dfsdm_adc_suspend(struct device *dev)
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
 
 	if (iio_buffer_enabled(indio_dev))
-		__stm32_dfsdm_predisable(indio_dev);
+		stm32_dfsdm_predisable(indio_dev);
 
 	return 0;
 }
@@ -1691,7 +1660,7 @@ static int __maybe_unused stm32_dfsdm_adc_resume(struct device *dev)
 	}
 
 	if (iio_buffer_enabled(indio_dev))
-		__stm32_dfsdm_postenable(indio_dev);
+		stm32_dfsdm_postenable(indio_dev);
 
 	return 0;
 }

drivers/iio/adc/ti-adc084s021.c

@@ -187,8 +187,6 @@ static const struct iio_info adc084s021_info = {
 
 static const struct iio_buffer_setup_ops adc084s021_buffer_setup_ops = {
 	.preenable = adc084s021_buffer_preenable,
-	.postenable = iio_triggered_buffer_postenable,
-	.predisable = iio_triggered_buffer_predisable,
 	.postdisable = adc084s021_buffer_postdisable,
 };
 

drivers/iio/adc/ti-ads1015.c

@@ -788,8 +788,6 @@ static int ads1015_buffer_postdisable(struct iio_dev *indio_dev)
 
 static const struct iio_buffer_setup_ops ads1015_buffer_setup_ops = {
 	.preenable	= ads1015_buffer_preenable,
-	.postenable	= iio_triggered_buffer_postenable,
-	.predisable	= iio_triggered_buffer_predisable,
 	.postdisable	= ads1015_buffer_postdisable,
 	.validate_scan_mask = &iio_validate_scan_mask_onehot,
 };

drivers/iio/adc/vf610_adc.c

@@ -724,13 +724,8 @@ static int vf610_adc_buffer_postenable(struct iio_dev *indio_dev)
 {
 	struct vf610_adc *info = iio_priv(indio_dev);
 	unsigned int channel;
-	int ret;
 	int val;
 
-	ret = iio_triggered_buffer_postenable(indio_dev);
-	if (ret)
-		return ret;
-
 	val = readl(info->regs + VF610_REG_ADC_GC);
 	val |= VF610_ADC_ADCON;
 	writel(val, info->regs + VF610_REG_ADC_GC);
@@ -761,7 +756,7 @@ static int vf610_adc_buffer_predisable(struct iio_dev *indio_dev)
 
 	writel(hc_cfg, info->regs + VF610_REG_ADC_HC0);
 
-	return iio_triggered_buffer_predisable(indio_dev);
+	return 0;
 }
 
 static const struct iio_buffer_setup_ops iio_triggered_buffer_setup_ops = {

drivers/iio/adc/xilinx-xadc-core.c

@@ -839,8 +839,6 @@ static int xadc_preenable(struct iio_dev *indio_dev)
 
 static const struct iio_buffer_setup_ops xadc_buffer_ops = {
 	.preenable = &xadc_preenable,
-	.postenable = &iio_triggered_buffer_postenable,
-	.predisable = &iio_triggered_buffer_predisable,
 	.postdisable = &xadc_postdisable,
 };
 

drivers/iio/buffer/industrialio-triggered-buffer.c

@@ -13,11 +13,6 @@
 #include <linux/iio/triggered_buffer.h>
 #include <linux/iio/trigger_consumer.h>
 
-static const struct iio_buffer_setup_ops iio_triggered_buffer_setup_ops = {
-	.postenable = &iio_triggered_buffer_postenable,
-	.predisable = &iio_triggered_buffer_predisable,
-};
-
 /**
  * iio_triggered_buffer_setup() - Setup triggered buffer and pollfunc
  * @indio_dev:		IIO device structure
@@ -67,10 +62,7 @@ int iio_triggered_buffer_setup(struct iio_dev *indio_dev,
 	}
 
 	/* Ring buffer functions - here trigger setup related */
-	if (setup_ops)
 	indio_dev->setup_ops = setup_ops;
-	else
-		indio_dev->setup_ops = &iio_triggered_buffer_setup_ops;
 
 	/* Flag that polled ring buffering is possible */
 	indio_dev->modes |= INDIO_BUFFER_TRIGGERED;

drivers/iio/chemical/atlas-sensor.c

@@ -410,10 +410,6 @@ static int atlas_buffer_postenable(struct iio_dev *indio_dev)
 	struct atlas_data *data = iio_priv(indio_dev);
 	int ret;
 
-	ret = iio_triggered_buffer_postenable(indio_dev);
-	if (ret)
-		return ret;
-
 	ret = pm_runtime_get_sync(&data->client->dev);
 	if (ret < 0) {
 		pm_runtime_put_noidle(&data->client->dev);
@@ -437,7 +433,7 @@ static int atlas_buffer_predisable(struct iio_dev *indio_dev)
 	if (ret)
 		return ret;
 
-	return iio_triggered_buffer_predisable(indio_dev);
+	return 0;
 }
 
 static const struct iio_trigger_ops atlas_interrupt_trigger_ops = {

drivers/iio/dummy/iio_simple_dummy_buffer.c

@@ -99,20 +99,6 @@ static irqreturn_t iio_simple_dummy_trigger_h(int irq, void *p)
 }
 
 static const struct iio_buffer_setup_ops iio_simple_dummy_buffer_setup_ops = {
-	/*
-	 * iio_triggered_buffer_postenable:
-	 * Generic function that simply attaches the pollfunc to the trigger.
-	 * Replace this to mess with hardware state before we attach the
-	 * trigger.
-	 */
-	.postenable = &iio_triggered_buffer_postenable,
-	/*
-	 * iio_triggered_buffer_predisable:
-	 * Generic function that simple detaches the pollfunc from the trigger.
-	 * Replace this to put hardware state back again after the trigger is
-	 * detached but before userspace knows we have disabled the ring.
-	 */
-	.predisable = &iio_triggered_buffer_predisable,
 };
 
 int iio_simple_dummy_configure_buffer(struct iio_dev *indio_dev)

drivers/iio/gyro/bmg160_core.c

@@ -1051,8 +1051,6 @@ static int bmg160_buffer_postdisable(struct iio_dev *indio_dev)
 
 static const struct iio_buffer_setup_ops bmg160_buffer_setup_ops = {
 	.preenable = bmg160_buffer_preenable,
-	.postenable = iio_triggered_buffer_postenable,
-	.predisable = iio_triggered_buffer_predisable,
 	.postdisable = bmg160_buffer_postdisable,
 };
 

drivers/iio/gyro/mpu3050-core.c

@@ -662,8 +662,6 @@ static int mpu3050_buffer_postdisable(struct iio_dev *indio_dev)
 
 static const struct iio_buffer_setup_ops mpu3050_buffer_setup_ops = {
 	.preenable = mpu3050_buffer_preenable,
-	.postenable = iio_triggered_buffer_postenable,
-	.predisable = iio_triggered_buffer_predisable,
 	.postdisable = mpu3050_buffer_postdisable,
 };
 

drivers/iio/gyro/st_gyro_buffer.c

@@ -33,13 +33,9 @@ static int st_gyro_buffer_postenable(struct iio_dev *indio_dev)
 {
 	int err;
 
-	err = iio_triggered_buffer_postenable(indio_dev);
-	if (err < 0)
-		return err;
-
 	err = st_sensors_set_axis_enable(indio_dev, indio_dev->active_scan_mask[0]);
 	if (err < 0)
-		goto st_gyro_buffer_predisable;
+		return err;
 
 	err = st_sensors_set_enable(indio_dev, true);
 	if (err < 0)
@@ -49,27 +45,18 @@ static int st_gyro_buffer_postenable(struct iio_dev *indio_dev)
 
 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);
 	return err;
 }
 
 static int st_gyro_buffer_predisable(struct iio_dev *indio_dev)
 {
-	int err, err2;
+	int err;
 
 	err = st_sensors_set_enable(indio_dev, false);
 	if (err < 0)
-		goto st_gyro_buffer_predisable;
-
-	err = st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS);
-
-st_gyro_buffer_predisable:
-	err2 = iio_triggered_buffer_predisable(indio_dev);
-	if (!err)
-		err = err2;
-
 		return err;
+
+	return st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS);
 }
 
 static const struct iio_buffer_setup_ops st_gyro_buffer_setup_ops = {

drivers/iio/humidity/hdc100x.c

@@ -278,17 +278,11 @@ static int hdc100x_buffer_postenable(struct iio_dev *indio_dev)
 	struct hdc100x_data *data = iio_priv(indio_dev);
 	int ret;
 
-	ret = iio_triggered_buffer_postenable(indio_dev);
-	if (ret)
-		return ret;
-
 	/* Buffer is enabled. First set ACQ Mode, then attach poll func */
 	mutex_lock(&data->lock);
 	ret = hdc100x_update_config(data, HDC100X_REG_CONFIG_ACQ_MODE,
 				    HDC100X_REG_CONFIG_ACQ_MODE);
 	mutex_unlock(&data->lock);
-	if (ret)
-		iio_triggered_buffer_predisable(indio_dev);
 
 	return ret;
 }
@@ -296,16 +290,12 @@ static int hdc100x_buffer_postenable(struct iio_dev *indio_dev)
 static int hdc100x_buffer_predisable(struct iio_dev *indio_dev)
 {
 	struct hdc100x_data *data = iio_priv(indio_dev);
-	int ret, ret2;
+	int ret;
 
 	mutex_lock(&data->lock);
 	ret = hdc100x_update_config(data, HDC100X_REG_CONFIG_ACQ_MODE, 0);
 	mutex_unlock(&data->lock);
 
-	ret2 = iio_triggered_buffer_predisable(indio_dev);
-	if (ret == 0)
-		ret = ret2;
-
 	return ret;
 }
 

drivers/iio/humidity/hts221_buffer.c

@@ -153,8 +153,6 @@ static int hts221_buffer_postdisable(struct iio_dev *iio_dev)
 
 static const struct iio_buffer_setup_ops hts221_buffer_ops = {
 	.preenable = hts221_buffer_preenable,
-	.postenable = iio_triggered_buffer_postenable,
-	.predisable = iio_triggered_buffer_predisable,
 	.postdisable = hts221_buffer_postdisable,
 };
 

drivers/iio/iio_core_trigger.h

@@ -18,6 +18,12 @@ void iio_device_register_trigger_consumer(struct iio_dev *indio_dev);
  **/
 void iio_device_unregister_trigger_consumer(struct iio_dev *indio_dev);
 
+
+int iio_trigger_attach_poll_func(struct iio_trigger *trig,
+				 struct iio_poll_func *pf);
+int iio_trigger_detach_poll_func(struct iio_trigger *trig,
+				 struct iio_poll_func *pf);
+
 #else
 
 /**
@@ -37,4 +43,15 @@ static void iio_device_unregister_trigger_consumer(struct iio_dev *indio_dev)
 {
 }
 
+static inline int iio_trigger_attach_poll_func(struct iio_trigger *trig,
+					       struct iio_poll_func *pf)
+{
+	return 0;
+}
+static inline int iio_trigger_detach_poll_func(struct iio_trigger *trig,
+					       struct iio_poll_func *pf)
+{
+	return 0;
+}
+
 #endif /* CONFIG_TRIGGER_CONSUMER */

drivers/iio/industrialio-buffer.c

@@ -20,6 +20,7 @@
 
 #include <linux/iio/iio.h>
 #include "iio_core.h"
+#include "iio_core_trigger.h"
 #include <linux/iio/sysfs.h>
 #include <linux/iio/buffer.h>
 #include <linux/iio/buffer_impl.h>
@@ -972,6 +973,13 @@ static int iio_enable_buffers(struct iio_dev *indio_dev,
 		}
 	}
 
+	if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED) {
+		ret = iio_trigger_attach_poll_func(indio_dev->trig,
+						   indio_dev->pollfunc);
+		if (ret)
+			goto err_disable_buffers;
+	}
+
 	return 0;
 
 err_disable_buffers:
@@ -998,6 +1006,11 @@ static int iio_disable_buffers(struct iio_dev *indio_dev)
 	if (list_empty(&indio_dev->buffer_list))
 		return 0;
 
+	if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED) {
+		iio_trigger_detach_poll_func(indio_dev->trig,
+					     indio_dev->pollfunc);
+	}
+
 	/*
 	 * If things go wrong at some step in disable we still need to continue
 	 * to perform the other steps, otherwise we leave the device in a

drivers/iio/industrialio-trigger.c

@@ -239,7 +239,7 @@ static void iio_trigger_put_irq(struct iio_trigger *trig, int irq)
  * the relevant function is in there may be the best option.
  */
 /* Worth protecting against double additions? */
-static int iio_trigger_attach_poll_func(struct iio_trigger *trig,
+int iio_trigger_attach_poll_func(struct iio_trigger *trig,
 				 struct iio_poll_func *pf)
 {
 	int ret = 0;
@@ -290,7 +290,7 @@ static int iio_trigger_attach_poll_func(struct iio_trigger *trig,
 	return ret;
 }
 
-static int iio_trigger_detach_poll_func(struct iio_trigger *trig,
+int iio_trigger_detach_poll_func(struct iio_trigger *trig,
 				 struct iio_poll_func *pf)
 {
 	int ret = 0;
@@ -705,17 +705,3 @@ void iio_device_unregister_trigger_consumer(struct iio_dev *indio_dev)
 	if (indio_dev->trig)
 		iio_trigger_put(indio_dev->trig);
 }
-
-int iio_triggered_buffer_postenable(struct iio_dev *indio_dev)
-{
-	return iio_trigger_attach_poll_func(indio_dev->trig,
-					    indio_dev->pollfunc);
-}
-EXPORT_SYMBOL(iio_triggered_buffer_postenable);
-
-int iio_triggered_buffer_predisable(struct iio_dev *indio_dev)
-{
-	return iio_trigger_detach_poll_func(indio_dev->trig,
-					     indio_dev->pollfunc);
-}
-EXPORT_SYMBOL(iio_triggered_buffer_predisable);

drivers/iio/light/gp2ap020a00f.c

@@ -1390,12 +1390,6 @@ static int gp2ap020a00f_buffer_postenable(struct iio_dev *indio_dev)
 
 	mutex_lock(&data->lock);
 
-	err = iio_triggered_buffer_postenable(indio_dev);
-	if (err < 0) {
-		mutex_unlock(&data->lock);
-		return err;
-	}
-
 	/*
 	 * Enable triggers according to the scan_mask. Enabling either
 	 * LIGHT_CLEAR or LIGHT_IR scan mode results in enabling ALS
@@ -1430,8 +1424,6 @@ static int gp2ap020a00f_buffer_postenable(struct iio_dev *indio_dev)
 		err = -ENOMEM;
 
 error_unlock:
-	if (err < 0)
-		iio_triggered_buffer_predisable(indio_dev);
 	mutex_unlock(&data->lock);
 
 	return err;
@@ -1465,8 +1457,6 @@ static int gp2ap020a00f_buffer_predisable(struct iio_dev *indio_dev)
 	if (err == 0)
 		kfree(data->buffer);
 
-	iio_triggered_buffer_predisable(indio_dev);
-
 	mutex_unlock(&data->lock);
 
 	return err;

drivers/iio/light/isl29125.c

@@ -216,36 +216,20 @@ static const struct iio_info isl29125_info = {
 static int isl29125_buffer_postenable(struct iio_dev *indio_dev)
 {
 	struct isl29125_data *data = iio_priv(indio_dev);
-	int err;
-
-	err = iio_triggered_buffer_postenable(indio_dev);
-	if (err)
-		return err;
 
 	data->conf1 |= ISL29125_MODE_RGB;
-	err = i2c_smbus_write_byte_data(data->client, ISL29125_CONF1,
+	return i2c_smbus_write_byte_data(data->client, ISL29125_CONF1,
 		data->conf1);
-	if (err) {
-		iio_triggered_buffer_predisable(indio_dev);
-		return err;
-	}
-
-	return 0;
 }
 
 static int isl29125_buffer_predisable(struct iio_dev *indio_dev)
 {
 	struct isl29125_data *data = iio_priv(indio_dev);
-	int ret;
 
 	data->conf1 &= ~ISL29125_MODE_MASK;
 	data->conf1 |= ISL29125_MODE_PD;
-	ret = i2c_smbus_write_byte_data(data->client, ISL29125_CONF1,
+	return i2c_smbus_write_byte_data(data->client, ISL29125_CONF1,
 		data->conf1);
-
-	iio_triggered_buffer_predisable(indio_dev);
-
-	return ret;
 }
 
 static const struct iio_buffer_setup_ops isl29125_buffer_setup_ops = {

drivers/iio/light/rpr0521.c

@@ -570,8 +570,6 @@ static int rpr0521_buffer_postdisable(struct iio_dev *indio_dev)
 
 static const struct iio_buffer_setup_ops rpr0521_buffer_setup_ops = {
 	.preenable = rpr0521_buffer_preenable,
-	.postenable = iio_triggered_buffer_postenable,
-	.predisable = iio_triggered_buffer_predisable,
 	.postdisable = rpr0521_buffer_postdisable,
 };
 

drivers/iio/light/si1145.c

@@ -1171,8 +1171,6 @@ static bool si1145_validate_scan_mask(struct iio_dev *indio_dev,
 
 static const struct iio_buffer_setup_ops si1145_buffer_setup_ops = {
 	.preenable = si1145_buffer_preenable,
-	.postenable = iio_triggered_buffer_postenable,
-	.predisable = iio_triggered_buffer_predisable,
 	.validate_scan_mask = si1145_validate_scan_mask,
 };
 

drivers/iio/light/st_uvis25_core.c

@@ -227,8 +227,6 @@ static int st_uvis25_buffer_postdisable(struct iio_dev *iio_dev)
 
 static const struct iio_buffer_setup_ops st_uvis25_buffer_ops = {
 	.preenable = st_uvis25_buffer_preenable,
-	.postenable = iio_triggered_buffer_postenable,
-	.predisable = iio_triggered_buffer_predisable,
 	.postdisable = st_uvis25_buffer_postdisable,
 };
 

drivers/iio/light/tcs3414.c

@@ -243,35 +243,19 @@ static const struct iio_info tcs3414_info = {
 static int tcs3414_buffer_postenable(struct iio_dev *indio_dev)
 {
 	struct tcs3414_data *data = iio_priv(indio_dev);
-	int ret;
-
-	ret = iio_triggered_buffer_postenable(indio_dev);
-	if (ret)
-		return ret;
 
 	data->control |= TCS3414_CONTROL_ADC_EN;
-	ret = i2c_smbus_write_byte_data(data->client, TCS3414_CONTROL,
+	return i2c_smbus_write_byte_data(data->client, TCS3414_CONTROL,
 		data->control);
-	if (ret)
-		iio_triggered_buffer_predisable(indio_dev);
-
-	return ret;
 }
 
 static int tcs3414_buffer_predisable(struct iio_dev *indio_dev)
 {
 	struct tcs3414_data *data = iio_priv(indio_dev);
-	int ret, ret2;
 
 	data->control &= ~TCS3414_CONTROL_ADC_EN;
-	ret = i2c_smbus_write_byte_data(data->client, TCS3414_CONTROL,
+	return i2c_smbus_write_byte_data(data->client, TCS3414_CONTROL,
 		data->control);
-
-	ret2 = iio_triggered_buffer_predisable(indio_dev);
-	if (!ret)
-		ret = ret2;
-
-	return ret;
 }
 
 static const struct iio_buffer_setup_ops tcs3414_buffer_setup_ops = {

drivers/iio/light/vcnl4000.c

@@ -957,50 +957,29 @@ static int vcnl4010_buffer_postenable(struct iio_dev *indio_dev)
 	int ret;
 	int cmd;
 
-	ret = iio_triggered_buffer_postenable(indio_dev);
-	if (ret)
-		return ret;
-
 	/* Do not enable the buffer if we are already capturing events. */
-	if (vcnl4010_is_in_periodic_mode(data)) {
-		ret = -EBUSY;
-		goto end;
-	}
+	if (vcnl4010_is_in_periodic_mode(data))
+		return -EBUSY;
 
 	ret = i2c_smbus_write_byte_data(data->client, VCNL4010_INT_CTRL,
 					VCNL4010_INT_PROX_EN);
 	if (ret < 0)
-		goto end;
+		return ret;
 
 	cmd = VCNL4000_SELF_TIMED_EN | VCNL4000_PROX_EN;
-	ret = i2c_smbus_write_byte_data(data->client, VCNL4000_COMMAND, cmd);
-	if (ret < 0)
-		goto end;
-
-	return 0;
-end:
-	iio_triggered_buffer_predisable(indio_dev);
-
-	return ret;
+	return i2c_smbus_write_byte_data(data->client, VCNL4000_COMMAND, cmd);
 }
 
 static int vcnl4010_buffer_predisable(struct iio_dev *indio_dev)
 {
 	struct vcnl4000_data *data = iio_priv(indio_dev);
-	int ret, ret_disable;
+	int ret;
 
 	ret = i2c_smbus_write_byte_data(data->client, VCNL4010_INT_CTRL, 0);
 	if (ret < 0)
-		goto end;
-
-	ret = i2c_smbus_write_byte_data(data->client, VCNL4000_COMMAND, 0);
-
-end:
-	ret_disable = iio_triggered_buffer_predisable(indio_dev);
-	if (ret == 0)
-		ret = ret_disable;
-
 		return ret;
+
+	return i2c_smbus_write_byte_data(data->client, VCNL4000_COMMAND, 0);
 }
 
 static const struct iio_buffer_setup_ops vcnl4010_buffer_ops = {

drivers/iio/magnetometer/bmc150_magn.c

@@ -836,8 +836,6 @@ static int bmc150_magn_buffer_postdisable(struct iio_dev *indio_dev)
 
 static const struct iio_buffer_setup_ops bmc150_magn_buffer_setup_ops = {
 	.preenable = bmc150_magn_buffer_preenable,
-	.postenable = iio_triggered_buffer_postenable,
-	.predisable = iio_triggered_buffer_predisable,
 	.postdisable = bmc150_magn_buffer_postdisable,
 };
 

drivers/iio/magnetometer/rm3100-core.c

@@ -463,8 +463,6 @@ static int rm3100_buffer_postdisable(struct iio_dev *indio_dev)
 
 static const struct iio_buffer_setup_ops rm3100_buffer_ops = {
 	.preenable = rm3100_buffer_preenable,
-	.postenable = iio_triggered_buffer_postenable,
-	.predisable = iio_triggered_buffer_predisable,
 	.postdisable = rm3100_buffer_postdisable,
 };
 

drivers/iio/magnetometer/st_magn_buffer.c

@@ -31,34 +31,12 @@ int st_magn_trig_set_state(struct iio_trigger *trig, bool state)
 
 static int st_magn_buffer_postenable(struct iio_dev *indio_dev)
 {
-	int err;
-
-	err = iio_triggered_buffer_postenable(indio_dev);
-	if (err < 0)
-		return err;
-
-	err = st_sensors_set_enable(indio_dev, true);
-	if (err < 0)
-		goto st_magn_buffer_predisable;
-
-	return 0;
-
-st_magn_buffer_predisable:
-	iio_triggered_buffer_predisable(indio_dev);
-	return err;
+	return st_sensors_set_enable(indio_dev, true);
 }
 
 static int st_magn_buffer_predisable(struct iio_dev *indio_dev)
 {
-	int err, err2;
-
-	err = st_sensors_set_enable(indio_dev, false);
-
-	err2 = iio_triggered_buffer_predisable(indio_dev);
-	if (!err)
-		err = err2;
-
-	return err;
+	return st_sensors_set_enable(indio_dev, false);
 }
 
 static const struct iio_buffer_setup_ops st_magn_buffer_setup_ops = {

drivers/iio/potentiostat/lmp91000.c

@@ -278,17 +278,8 @@ static const struct iio_trigger_ops lmp91000_trigger_ops = {
 static int lmp91000_buffer_postenable(struct iio_dev *indio_dev)
 {
 	struct lmp91000_data *data = iio_priv(indio_dev);
-	int err;
 
-	err = iio_triggered_buffer_postenable(indio_dev);
-	if (err)
-		return err;
-
-	err = iio_channel_start_all_cb(data->cb_buffer);
-	if (err)
-		iio_triggered_buffer_predisable(indio_dev);
-
-	return err;
+	return iio_channel_start_all_cb(data->cb_buffer);
 }
 
 static int lmp91000_buffer_predisable(struct iio_dev *indio_dev)
@@ -297,7 +288,7 @@ static int lmp91000_buffer_predisable(struct iio_dev *indio_dev)
 
 	iio_channel_stop_all_cb(data->cb_buffer);
 
-	return iio_triggered_buffer_predisable(indio_dev);
+	return 0;
 }
 
 static const struct iio_buffer_setup_ops lmp91000_buffer_setup_ops = {

drivers/iio/pressure/st_pressure_buffer.c

@@ -31,34 +31,12 @@ int st_press_trig_set_state(struct iio_trigger *trig, bool state)
 
 static int st_press_buffer_postenable(struct iio_dev *indio_dev)
 {
-	int err;
-
-	err = iio_triggered_buffer_postenable(indio_dev);
-	if (err < 0)
-		return err;
-
-	err = st_sensors_set_enable(indio_dev, true);
-	if (err < 0)
-		goto st_press_buffer_predisable;
-
-	return 0;
-
-st_press_buffer_predisable:
-	iio_triggered_buffer_predisable(indio_dev);
-	return err;
+	return st_sensors_set_enable(indio_dev, true);
 }
 
 static int st_press_buffer_predisable(struct iio_dev *indio_dev)
 {
-	int err, err2;
-
-	err = st_sensors_set_enable(indio_dev, false);
-
-	err2 = iio_triggered_buffer_predisable(indio_dev);
-	if (!err)
-		err = err2;
-
-	return err;
+	return st_sensors_set_enable(indio_dev, false);
 }
 
 static const struct iio_buffer_setup_ops st_press_buffer_setup_ops = {

drivers/iio/pressure/zpa2326.c

@@ -1242,19 +1242,17 @@ static int zpa2326_postenable_buffer(struct iio_dev *indio_dev)
 	const struct zpa2326_private *priv = iio_priv(indio_dev);
 	int                           err;
 
-	/* Plug our own trigger event handler. */
-	err = iio_triggered_buffer_postenable(indio_dev);
-	if (err)
-		goto err;
-
 	if (!priv->waken) {
 		/*
 		 * We were already power supplied. Just clear hardware FIFO to
 		 * get rid of samples acquired during previous rounds (if any).
 		 */
 		err = zpa2326_clear_fifo(indio_dev, 0);
-		if (err)
-			goto err_buffer_predisable;
+		if (err) {
+			zpa2326_err(indio_dev,
+				    "failed to enable buffering (%d)", err);
+			return err;
+		}
 	}
 
 	if (!iio_trigger_using_own(indio_dev) && priv->waken) {
@@ -1263,18 +1261,14 @@ static int zpa2326_postenable_buffer(struct iio_dev *indio_dev)
 		 * powered up: reconfigure one-shot mode.
 		 */
 		err = zpa2326_config_oneshot(indio_dev, priv->irq);
-		if (err)
-			goto err_buffer_predisable;
+		if (err) {
+			zpa2326_err(indio_dev,
+				    "failed to enable buffering (%d)", err);
+			return err;
+		}
 	}
 
 	return 0;
-
-err_buffer_predisable:
-	iio_triggered_buffer_predisable(indio_dev);
-err:
-	zpa2326_err(indio_dev, "failed to enable buffering (%d)", err);
-
-	return err;
 }
 
 static int zpa2326_postdisable_buffer(struct iio_dev *indio_dev)
@@ -1287,7 +1281,6 @@ static int zpa2326_postdisable_buffer(struct iio_dev *indio_dev)
 static const struct iio_buffer_setup_ops zpa2326_buffer_setup_ops = {
 	.preenable   = zpa2326_preenable_buffer,
 	.postenable  = zpa2326_postenable_buffer,
-	.predisable  = iio_triggered_buffer_predisable,
 	.postdisable = zpa2326_postdisable_buffer
 };
 

drivers/iio/proximity/sx9310.c

@@ -736,8 +736,6 @@ static int sx9310_buffer_postdisable(struct iio_dev *indio_dev)
 
 static const struct iio_buffer_setup_ops sx9310_buffer_setup_ops = {
 	.preenable = sx9310_buffer_preenable,
-	.postenable = iio_triggered_buffer_postenable,
-	.predisable = iio_triggered_buffer_predisable,
 	.postdisable = sx9310_buffer_postdisable,
 };
 

drivers/iio/proximity/sx9500.c

@@ -680,10 +680,6 @@ static int sx9500_buffer_postenable(struct iio_dev *indio_dev)
 	struct sx9500_data *data = iio_priv(indio_dev);
 	int ret = 0, i;
 
-	ret = iio_triggered_buffer_postenable(indio_dev);
-	if (ret)
-		return ret;
-
 	mutex_lock(&data->mutex);
 
 	for (i = 0; i < SX9500_NUM_CHANNELS; i++)
@@ -700,9 +696,6 @@ static int sx9500_buffer_postenable(struct iio_dev *indio_dev)
 
 	mutex_unlock(&data->mutex);
 
-	if (ret)
-		iio_triggered_buffer_predisable(indio_dev);
-
 	return ret;
 }
 
@@ -727,8 +720,6 @@ static int sx9500_buffer_predisable(struct iio_dev *indio_dev)
 
 	mutex_unlock(&data->mutex);
 
-	iio_triggered_buffer_predisable(indio_dev);
-
 	return ret;
 }
 

include/linux/iio/trigger_consumer.h

@@ -50,11 +50,4 @@ irqreturn_t iio_pollfunc_store_time(int irq, void *p);
 
 void iio_trigger_notify_done(struct iio_trigger *trig);
 
-/*
- * Two functions for common case where all that happens is a pollfunc
- * is attached and detached from a trigger
- */
-int iio_triggered_buffer_postenable(struct iio_dev *indio_dev);
-int iio_triggered_buffer_predisable(struct iio_dev *indio_dev);
-
 #endif