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Date: Fri, 10 Apr 2020 15:39:47 +0300
From: Alexandru Ardelean <alexandru.ardelean@...log.com>
To: <linux-iio@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC: <jic23@...nel.org>, <lars@...afoo.de>,
Alexandru Ardelean <alexandru.ardelean@...log.com>
Subject: [PATCH v2 4/5] iio: buffer: move sysfs alloc/free in industrialio-buffer.c
Since we now have the 'iio_device_buffers_{un}init()' entry-points into the
industrialio-buffer.c we can now move the sysfs alloc & free in there as
part of that init/uninit.
This changes the order of iio_device_register()/iio_device_unregister() a
bit, but overall this shouldn't matter.
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@...log.com>
---
drivers/iio/iio_core.h | 10 ----------
drivers/iio/industrialio-buffer.c | 29 +++++++++++++++--------------
drivers/iio/industrialio-core.c | 14 +-------------
3 files changed, 16 insertions(+), 37 deletions(-)
diff --git a/drivers/iio/iio_core.h b/drivers/iio/iio_core.h
index 4bdadeac2710..1d69071e1426 100644
--- a/drivers/iio/iio_core.h
+++ b/drivers/iio/iio_core.h
@@ -48,9 +48,6 @@ void iio_device_buffers_uninit(struct iio_dev *indio_dev);
void iio_device_buffers_put(struct iio_dev *indio_dev);
-int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev);
-void iio_buffer_free_sysfs_and_mask(struct iio_dev *indio_dev);
-
void iio_disable_all_buffers(struct iio_dev *indio_dev);
void iio_buffer_wakeup_poll(struct iio_dev *indio_dev);
@@ -66,13 +63,6 @@ static inline void iio_device_buffers_uninit(struct iio_dev *indio_dev) {}
static inline void iio_device_buffers_put(struct iio_dev *indio_dev) {}
-static inline int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev)
-{
- return 0;
-}
-
-static inline void iio_buffer_free_sysfs_and_mask(struct iio_dev *indio_dev) {}
-
static inline void iio_disable_all_buffers(struct iio_dev *indio_dev) {}
static inline void iio_buffer_wakeup_poll(struct iio_dev *indio_dev) {}
diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c
index 4b5c3baadaab..8ab089a9c3bc 100644
--- a/drivers/iio/industrialio-buffer.c
+++ b/drivers/iio/industrialio-buffer.c
@@ -1284,11 +1284,11 @@ static struct attribute *iio_buffer_attrs[] = {
&dev_attr_data_available.attr,
};
-int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev)
+static int iio_buffer_alloc_sysfs_and_mask(struct iio_buffer *buffer)
{
+ struct iio_dev *indio_dev = buffer->indio_dev;
struct iio_dev_attr *p;
struct attribute **attr;
- struct iio_buffer *buffer = indio_dev->buffer;
int ret, i, attrn, attrcount, attrcount_orig = 0;
const struct iio_chan_spec *channels;
@@ -1301,9 +1301,6 @@ int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev)
indio_dev->masklength = ml;
}
- if (!buffer)
- return 0;
-
attrcount = 0;
if (buffer->attrs) {
while (buffer->attrs[attrcount] != NULL)
@@ -1395,15 +1392,12 @@ int iio_buffer_alloc_sysfs_and_mask(struct iio_dev *indio_dev)
return ret;
}
-void iio_buffer_free_sysfs_and_mask(struct iio_dev *indio_dev)
+static void iio_buffer_free_sysfs_and_mask(struct iio_buffer *buffer)
{
- if (!indio_dev->buffer)
- return;
-
- bitmap_free(indio_dev->buffer->scan_mask);
- kfree(indio_dev->buffer->buffer_group.attrs);
- kfree(indio_dev->buffer->scan_el_group.attrs);
- iio_free_chan_devattr_list(&indio_dev->buffer->scan_el_dev_attr_list);
+ bitmap_free(buffer->scan_mask);
+ kfree(buffer->buffer_group.attrs);
+ kfree(buffer->scan_el_group.attrs);
+ iio_free_chan_devattr_list(&buffer->scan_el_dev_attr_list);
}
static const struct file_operations iio_buffer_fileops = {
@@ -1425,13 +1419,19 @@ int iio_device_buffers_init(struct iio_dev *indio_dev, struct module *this_mod)
if (!buffer)
return -ENOTSUPP;
+ ret = iio_buffer_alloc_sysfs_and_mask(buffer);
+ if (ret)
+ return ret;
+
cdev_init(&buffer->chrdev, &iio_buffer_fileops);
buffer->chrdev.owner = this_mod;
ret = cdev_device_add(&buffer->chrdev, &indio_dev->dev);
- if (ret)
+ if (ret) {
+ iio_buffer_free_sysfs_and_mask(buffer);
return ret;
+ }
iio_device_get(indio_dev);
iio_buffer_get(buffer);
@@ -1457,6 +1457,7 @@ void iio_device_buffers_uninit(struct iio_dev *indio_dev)
return;
cdev_device_del(&buffer->chrdev, &indio_dev->dev);
+ iio_buffer_free_sysfs_and_mask(buffer);
iio_buffer_put(buffer);
iio_device_put(indio_dev);
}
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index 2158aeab0bd2..794aaa4be832 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -1737,18 +1737,11 @@ int __iio_device_register(struct iio_dev *indio_dev, struct module *this_mod)
iio_device_register_debugfs(indio_dev);
- ret = iio_buffer_alloc_sysfs_and_mask(indio_dev);
- if (ret) {
- dev_err(indio_dev->dev.parent,
- "Failed to create buffer sysfs interfaces\n");
- goto error_unreg_debugfs;
- }
-
ret = iio_device_register_sysfs(indio_dev);
if (ret) {
dev_err(indio_dev->dev.parent,
"Failed to register sysfs interfaces\n");
- goto error_buffer_free_sysfs;
+ goto error_free_sysfs;
}
ret = iio_device_register_eventset(indio_dev);
if (ret) {
@@ -1785,9 +1778,6 @@ int __iio_device_register(struct iio_dev *indio_dev, struct module *this_mod)
iio_device_unregister_eventset(indio_dev);
error_free_sysfs:
iio_device_unregister_sysfs(indio_dev);
-error_buffer_free_sysfs:
- iio_buffer_free_sysfs_and_mask(indio_dev);
-error_unreg_debugfs:
iio_device_unregister_debugfs(indio_dev);
return ret;
}
@@ -1818,8 +1808,6 @@ void iio_device_unregister(struct iio_dev *indio_dev)
iio_buffer_wakeup_poll(indio_dev);
mutex_unlock(&indio_dev->info_exist_lock);
-
- iio_buffer_free_sysfs_and_mask(indio_dev);
}
EXPORT_SYMBOL(iio_device_unregister);
--
2.17.1
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