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From:   Joe Simmons-Talbott <joetalbott@gmail.com>
To:     jic23@kernel.org, linux-iio@vger.kernel.org,
        linux-kernel@vger.kernel.org
Cc:     Joe Simmons-Talbott <joetalbott@gmail.com>,
        Joe Perches <joe@perches.com>,
        Andy Shevchenko <andy.shevchenko@gmail.com>
Subject: [PATCH v3] iio: Use octal permissions and DEVICE_ATTR_{RO,RW}.
Date:   Wed,  1 Jun 2022 14:54:14 -0400
Message-Id: <20220601185414.251571-1-joetalbott@gmail.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

As reported by checkpatch.pl.  Where possible use DEVICE_ATTR_RO(),
DEVICE_ATTR_RW(), and __ATTR_RO().  Change function names to be
<var>_show() for read and <var>_store() for write.

Suggested-by: Joe Perches <joe@perches.com>
Suggested-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Joe Simmons-Talbott <joetalbott@gmail.com>
---

Changes in v3:
  - Use __ATTR_RO() and add parens to DEVICE_ATTR_{RW,RO} in description
    as suggested by Andy Shevchenko <andy.shevchenko@gmail.com>

Changes in v2:
  - Use DEVICE_ATTR_RO() and DEVICE_ATTR_RW() rather than octal permissions
	where applicable.  Rename functions to <var>-show() and
	<var>-store().  Based on review by Joe Perches <joe@perches.com>

 drivers/iio/industrialio-buffer.c  | 64 ++++++++++++++----------------
 drivers/iio/industrialio-core.c    | 35 ++++++++--------
 drivers/iio/industrialio-trigger.c | 32 +++++++--------
 3 files changed, 61 insertions(+), 70 deletions(-)

diff --git a/drivers/iio/industrialio-buffer.c b/drivers/iio/industrialio-buffer.c
index b078eb2f3c9d..80121b1ac554 100644
--- a/drivers/iio/industrialio-buffer.c
+++ b/drivers/iio/industrialio-buffer.c
@@ -630,18 +630,18 @@ static int iio_buffer_add_channel_sysfs(struct iio_dev *indio_dev,
 	return ret;
 }
 
-static ssize_t iio_buffer_read_length(struct device *dev,
-				      struct device_attribute *attr,
-				      char *buf)
+static ssize_t length_show(struct device *dev,
+			   struct device_attribute *attr,
+			   char *buf)
 {
 	struct iio_buffer *buffer = to_iio_dev_attr(attr)->buffer;
 
 	return sysfs_emit(buf, "%d\n", buffer->length);
 }
 
-static ssize_t iio_buffer_write_length(struct device *dev,
-				       struct device_attribute *attr,
-				       const char *buf, size_t len)
+static ssize_t length_store(struct device *dev,
+			    struct device_attribute *attr,
+			    const char *buf, size_t len)
 {
 	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
 	struct iio_buffer *buffer = to_iio_dev_attr(attr)->buffer;
@@ -672,9 +672,9 @@ static ssize_t iio_buffer_write_length(struct device *dev,
 	return ret ? ret : len;
 }
 
-static ssize_t iio_buffer_show_enable(struct device *dev,
-				      struct device_attribute *attr,
-				      char *buf)
+static ssize_t enable_show(struct device *dev,
+			   struct device_attribute *attr,
+			   char *buf)
 {
 	struct iio_buffer *buffer = to_iio_dev_attr(attr)->buffer;
 
@@ -1289,10 +1289,10 @@ void iio_disable_all_buffers(struct iio_dev *indio_dev)
 	iio_buffer_deactivate_all(indio_dev);
 }
 
-static ssize_t iio_buffer_store_enable(struct device *dev,
-				       struct device_attribute *attr,
-				       const char *buf,
-				       size_t len)
+static ssize_t enable_store(struct device *dev,
+			    struct device_attribute *attr,
+			    const char *buf,
+			    size_t len)
 {
 	int ret;
 	bool requested_state;
@@ -1322,19 +1322,19 @@ static ssize_t iio_buffer_store_enable(struct device *dev,
 	return (ret < 0) ? ret : len;
 }
 
-static ssize_t iio_buffer_show_watermark(struct device *dev,
-					 struct device_attribute *attr,
-					 char *buf)
+static ssize_t watermark_show(struct device *dev,
+			      struct device_attribute *attr,
+			      char *buf)
 {
 	struct iio_buffer *buffer = to_iio_dev_attr(attr)->buffer;
 
 	return sysfs_emit(buf, "%u\n", buffer->watermark);
 }
 
-static ssize_t iio_buffer_store_watermark(struct device *dev,
-					  struct device_attribute *attr,
-					  const char *buf,
-					  size_t len)
+static ssize_t watermark_store(struct device *dev,
+			       struct device_attribute *attr,
+			       const char *buf,
+			       size_t len)
 {
 	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
 	struct iio_buffer *buffer = to_iio_dev_attr(attr)->buffer;
@@ -1366,9 +1366,9 @@ static ssize_t iio_buffer_store_watermark(struct device *dev,
 	return ret ? ret : len;
 }
 
-static ssize_t iio_dma_show_data_available(struct device *dev,
-						struct device_attribute *attr,
-						char *buf)
+static ssize_t data_available_show(struct device *dev,
+				   struct device_attribute *attr,
+				   char *buf)
 {
 	struct iio_buffer *buffer = to_iio_dev_attr(attr)->buffer;
 
@@ -1391,18 +1391,12 @@ static ssize_t direction_show(struct device *dev,
 	}
 }
 
-static DEVICE_ATTR(length, S_IRUGO | S_IWUSR, iio_buffer_read_length,
-		   iio_buffer_write_length);
-static struct device_attribute dev_attr_length_ro = __ATTR(length,
-	S_IRUGO, iio_buffer_read_length, NULL);
-static DEVICE_ATTR(enable, S_IRUGO | S_IWUSR,
-		   iio_buffer_show_enable, iio_buffer_store_enable);
-static DEVICE_ATTR(watermark, S_IRUGO | S_IWUSR,
-		   iio_buffer_show_watermark, iio_buffer_store_watermark);
-static struct device_attribute dev_attr_watermark_ro = __ATTR(watermark,
-	S_IRUGO, iio_buffer_show_watermark, NULL);
-static DEVICE_ATTR(data_available, S_IRUGO,
-		iio_dma_show_data_available, NULL);
+static DEVICE_ATTR_RW(length);
+static struct device_attribute dev_attr_length_ro = __ATTR_RO(length);
+static DEVICE_ATTR_RW(enable);
+static DEVICE_ATTR_RW(watermark);
+static struct device_attribute dev_attr_watermark_ro = __ATTR_RO(watermark);
+static DEVICE_ATTR_RO(data_available);
 static DEVICE_ATTR_RO(direction);
 
 /*
diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c
index e1ed44dec2ab..bb1dd00b99ac 100644
--- a/drivers/iio/industrialio-core.c
+++ b/drivers/iio/industrialio-core.c
@@ -1114,12 +1114,12 @@ int __iio_device_attr_init(struct device_attribute *dev_attr,
 	dev_attr->attr.name = name;
 
 	if (readfunc) {
-		dev_attr->attr.mode |= S_IRUGO;
+		dev_attr->attr.mode |= 0444;
 		dev_attr->show = readfunc;
 	}
 
 	if (writefunc) {
-		dev_attr->attr.mode |= S_IWUSR;
+		dev_attr->attr.mode |= 0200;
 		dev_attr->store = writefunc;
 	}
 
@@ -1393,29 +1393,29 @@ void iio_free_chan_devattr_list(struct list_head *attr_list)
 	}
 }
 
-static ssize_t iio_show_dev_name(struct device *dev,
-				 struct device_attribute *attr,
-				 char *buf)
+static ssize_t name_show(struct device *dev,
+			 struct device_attribute *attr,
+			 char *buf)
 {
 	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
 	return sysfs_emit(buf, "%s\n", indio_dev->name);
 }
 
-static DEVICE_ATTR(name, S_IRUGO, iio_show_dev_name, NULL);
+static DEVICE_ATTR_RO(name);
 
-static ssize_t iio_show_dev_label(struct device *dev,
-				 struct device_attribute *attr,
-				 char *buf)
+static ssize_t label_show(struct device *dev,
+			  struct device_attribute *attr,
+			  char *buf)
 {
 	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
 	return sysfs_emit(buf, "%s\n", indio_dev->label);
 }
 
-static DEVICE_ATTR(label, S_IRUGO, iio_show_dev_label, NULL);
+static DEVICE_ATTR_RO(label);
 
-static ssize_t iio_show_timestamp_clock(struct device *dev,
-					struct device_attribute *attr,
-					char *buf)
+static ssize_t current_timestamp_clock_show(struct device *dev,
+					    struct device_attribute *attr,
+					    char *buf)
 {
 	const struct iio_dev *indio_dev = dev_to_iio_dev(dev);
 	const clockid_t clk = iio_device_get_clock(indio_dev);
@@ -1459,9 +1459,9 @@ static ssize_t iio_show_timestamp_clock(struct device *dev,
 	return sz;
 }
 
-static ssize_t iio_store_timestamp_clock(struct device *dev,
-					 struct device_attribute *attr,
-					 const char *buf, size_t len)
+static ssize_t current_timestamp_clock_store(struct device *dev,
+					     struct device_attribute *attr,
+					     const char *buf, size_t len)
 {
 	clockid_t clk;
 	int ret;
@@ -1509,8 +1509,7 @@ int iio_device_register_sysfs_group(struct iio_dev *indio_dev,
 	return 0;
 }
 
-static DEVICE_ATTR(current_timestamp_clock, S_IRUGO | S_IWUSR,
-		   iio_show_timestamp_clock, iio_store_timestamp_clock);
+static DEVICE_ATTR_RW(current_timestamp_clock);
 
 static int iio_device_register_sysfs(struct iio_dev *indio_dev)
 {
diff --git a/drivers/iio/industrialio-trigger.c b/drivers/iio/industrialio-trigger.c
index f504ed351b3e..21f113c0ee96 100644
--- a/drivers/iio/industrialio-trigger.c
+++ b/drivers/iio/industrialio-trigger.c
@@ -37,7 +37,7 @@ static LIST_HEAD(iio_trigger_list);
 static DEFINE_MUTEX(iio_trigger_list_lock);
 
 /**
- * iio_trigger_read_name() - retrieve useful identifying name
+ * name_show() - retrieve useful identifying name
  * @dev:	device associated with the iio_trigger
  * @attr:	pointer to the device_attribute structure that is
  *		being processed
@@ -46,15 +46,15 @@ static DEFINE_MUTEX(iio_trigger_list_lock);
  * Return: a negative number on failure or the number of written
  *	   characters on success.
  */
-static ssize_t iio_trigger_read_name(struct device *dev,
-				     struct device_attribute *attr,
-				     char *buf)
+static ssize_t name_show(struct device *dev,
+			 struct device_attribute *attr,
+			 char *buf)
 {
 	struct iio_trigger *trig = to_iio_trigger(dev);
 	return sysfs_emit(buf, "%s\n", trig->name);
 }
 
-static DEVICE_ATTR(name, S_IRUGO, iio_trigger_read_name, NULL);
+static DEVICE_ATTR_RO(name);
 
 static struct attribute *iio_trig_dev_attrs[] = {
 	&dev_attr_name.attr,
@@ -395,7 +395,7 @@ void iio_dealloc_pollfunc(struct iio_poll_func *pf)
 EXPORT_SYMBOL_GPL(iio_dealloc_pollfunc);
 
 /**
- * iio_trigger_read_current() - trigger consumer sysfs query current trigger
+ * current_trigger_show() - trigger consumer sysfs query current trigger
  * @dev:	device associated with an industrial I/O device
  * @attr:	pointer to the device_attribute structure that
  *		is being processed
@@ -407,9 +407,9 @@ EXPORT_SYMBOL_GPL(iio_dealloc_pollfunc);
  * Return: a negative number on failure, the number of characters written
  *	   on success or 0 if no trigger is available
  */
-static ssize_t iio_trigger_read_current(struct device *dev,
-					struct device_attribute *attr,
-					char *buf)
+static ssize_t current_trigger_show(struct device *dev,
+				    struct device_attribute *attr,
+				    char *buf)
 {
 	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
 
@@ -419,7 +419,7 @@ static ssize_t iio_trigger_read_current(struct device *dev,
 }
 
 /**
- * iio_trigger_write_current() - trigger consumer sysfs set current trigger
+ * current_trigger_store() - trigger consumer sysfs set current trigger
  * @dev:	device associated with an industrial I/O device
  * @attr:	device attribute that is being processed
  * @buf:	string buffer that holds the name of the trigger
@@ -432,10 +432,10 @@ static ssize_t iio_trigger_read_current(struct device *dev,
  * Return: negative error code on failure or length of the buffer
  *	   on success
  */
-static ssize_t iio_trigger_write_current(struct device *dev,
-					 struct device_attribute *attr,
-					 const char *buf,
-					 size_t len)
+static ssize_t current_trigger_store(struct device *dev,
+				     struct device_attribute *attr,
+				     const char *buf,
+				     size_t len)
 {
 	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
 	struct iio_dev_opaque *iio_dev_opaque = to_iio_dev_opaque(indio_dev);
@@ -494,9 +494,7 @@ static ssize_t iio_trigger_write_current(struct device *dev,
 	return ret;
 }
 
-static DEVICE_ATTR(current_trigger, S_IRUGO | S_IWUSR,
-		   iio_trigger_read_current,
-		   iio_trigger_write_current);
+static DEVICE_ATTR_RW(current_trigger);
 
 static struct attribute *iio_trigger_consumer_attrs[] = {
 	&dev_attr_current_trigger.attr,
-- 
2.35.3