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From: Alexandru Ardelean <alexandru.ardelean@analog.com>
To: <linux-iio@vger.kernel.org>
Cc: Alexandru Ardelean <alexandru.ardelean@analog.com>
Subject: [PATCH][V2] iio: st_accel: fix iio_triggered_buffer_{pre,post}enable positions
Date: Wed, 29 May 2019 16:58:48 +0300
Message-ID: <20190529135848.11964-1-alexandru.ardelean@analog.com> (raw)
In-Reply-To: <20190529130121.30532-1-alexandru.ardelean@analog.com>

The iio_triggered_buffer_{predisable,postenable} functions attach/detach
the poll functions.

For the predisable hook, the disable code should occur before detaching
the poll func, and for the postenable hook, the poll func should be
attached before the enable code.

Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
---
Changelog v1 -> v2:
* record the first error in st_accel_buffer_predisable() and return that 

 drivers/iio/accel/st_accel_buffer.c | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/drivers/iio/accel/st_accel_buffer.c b/drivers/iio/accel/st_accel_buffer.c
index 7fddc137e91e..711ecd9bc898 100644
--- a/drivers/iio/accel/st_accel_buffer.c
+++ b/drivers/iio/accel/st_accel_buffer.c
@@ -40,6 +40,10 @@ static int st_accel_buffer_postenable(struct iio_dev *indio_dev)
 	int err;
 	struct st_sensor_data *adata = iio_priv(indio_dev);
 
+	err = iio_triggered_buffer_postenable(indio_dev);
+	if (err < 0)
+		return err;
+
 	adata->buffer_data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
 	if (adata->buffer_data == NULL) {
 		err = -ENOMEM;
@@ -51,34 +55,33 @@ static int st_accel_buffer_postenable(struct iio_dev *indio_dev)
 	if (err < 0)
 		goto st_accel_buffer_postenable_error;
 
-	err = iio_triggered_buffer_postenable(indio_dev);
-	if (err < 0)
-		goto st_accel_buffer_postenable_error;
-
 	return err;
 
 st_accel_buffer_postenable_error:
 	kfree(adata->buffer_data);
 allocate_memory_error:
+	iio_triggered_buffer_predisable(indio_dev);
 	return err;
 }
 
 static int st_accel_buffer_predisable(struct iio_dev *indio_dev)
 {
-	int err;
+	int err, err2;
 	struct st_sensor_data *adata = iio_priv(indio_dev);
 
-	err = iio_triggered_buffer_predisable(indio_dev);
-	if (err < 0)
-		goto st_accel_buffer_predisable_error;
-
 	err = st_sensors_set_axis_enable(indio_dev, ST_SENSORS_ENABLE_ALL_AXIS);
 	if (err < 0)
 		goto st_accel_buffer_predisable_error;
 
 	err = st_sensors_set_enable(indio_dev, false);
+	if (err < 0)
+		goto st_accel_buffer_predisable_error;
 
 st_accel_buffer_predisable_error:
+	err2 = iio_triggered_buffer_predisable(indio_dev);
+	if (!err)
+		err = err2;
+
 	kfree(adata->buffer_data);
 	return err;
 }
-- 
2.20.1


  reply index

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-05-29 13:01 [PATCH] " Alexandru Ardelean
2019-05-29 13:58 ` Alexandru Ardelean [this message]
2019-06-08 14:09   ` [PATCH][V2] " Jonathan Cameron
2019-06-10 21:20     ` Denis CIOCCA
2019-06-14 10:36       ` Ardelean, Alexandru
2019-06-14 10:47   ` [PATCH][V3] " Alexandru Ardelean
2019-06-17 22:12     ` Denis CIOCCA
2019-06-22  8:28       ` Jonathan Cameron

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