[PATCH] Staging: iio: meter: Use devm functions

[Shraddha Barke]

Introduce use of managed resource function devm_iio_trigger_alloc
instead of iio_trigger_alloc and devm_request_irq instead of request_irq
Remove corresponding calls to iio_trigger_free and free_irq in the probe
and remove functions.
The now unnecessary labels error_free_trig and err_free_irq are dropped.

Signed-off-by: Shraddha Barke <shraddha.6596@xxxxxxxxx>
--- 

 drivers/staging/iio/meter/ade7758_trigger.c | 26 ++++++++++----------------
 1 file changed, 10 insertions(+), 16 deletions(-)

diff --git a/drivers/staging/iio/meter/ade7758_trigger.c b/drivers/staging/iio/meter/ade7758_trigger.c
index 5b35a7f..e313b37 100644
--- a/drivers/staging/iio/meter/ade7758_trigger.c
+++ b/drivers/staging/iio/meter/ade7758_trigger.c
@@ -63,21 +63,21 @@ int ade7758_probe_trigger(struct iio_dev *indio_dev)
 	struct ade7758_state *st = iio_priv(indio_dev);
 	int ret;
 
-	st->trig = iio_trigger_alloc("%s-dev%d",
-					spi_get_device_id(st->us)->name,
-					indio_dev->id);
+	st->trig = devm_iio_trigger_alloc(&indio_dev->id, "%s-dev%d",
+					  spi_get_device_id(st->us)->name,
+					  indio_dev->id);
 	if (!st->trig) {
 		ret = -ENOMEM;
 		goto error_ret;
 	}
 
-	ret = request_irq(st->us->irq,
-			  ade7758_data_rdy_trig_poll,
-			  IRQF_TRIGGER_LOW,
-			  spi_get_device_id(st->us)->name,
-			  st->trig);
+	ret = devm_request_irq(&indio_dev->dev, st->us->irq,
+			       ade7758_data_rdy_trig_poll,
+			       IRQF_TRIGGER_LOW,
+			       spi_get_device_id(st->us)->name,
+			       st->trig);
 	if (ret)
-		goto error_free_trig;
+		goto error_ret
 
 	st->trig->dev.parent = &st->us->dev;
 	st->trig->ops = &ade7758_trigger_ops;
@@ -87,14 +87,10 @@ int ade7758_probe_trigger(struct iio_dev *indio_dev)
 	/* select default trigger */
 	indio_dev->trig = iio_trigger_get(st->trig);
 	if (ret)
-		goto error_free_irq;
+		goto error_ret;
 
 	return 0;
 
-error_free_irq:
-	free_irq(st->us->irq, st->trig);
-error_free_trig:
-	iio_trigger_free(st->trig);
 error_ret:
 	return ret;
 }
@@ -104,6 +100,4 @@ void ade7758_remove_trigger(struct iio_dev *indio_dev)
 	struct ade7758_state *st = iio_priv(indio_dev);
 
 	iio_trigger_unregister(st->trig);
-	free_irq(st->us->irq, st->trig);
-	iio_trigger_free(st->trig);
 }
-- 
2.1.4

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