[09/22] gpiolib: cdev: rename priv to gcdev

Message ID 20200623040107.22270-10-warthog618@gmail.com
State Accepted
Commit e2b781c5f0dd45f632b3e15bbca702d1d140fce7
Headers show
Series
  • [01/22] gpiolib: move gpiolib-sysfs function declarations into their own header
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Commit Message

Kent Gibson June 23, 2020, 4 a.m.
Rename priv to gcdev to improve readability.

The name "priv" indicates that the object is pointed to by
file->private_data, not what the object is actually is.
It is always used to point to a struct gpio_chardev_data so renaming
it to gcdev seemed as good as anything, and certainly clearer than "priv".

Signed-off-by: Kent Gibson <warthog618@gmail.com>

---
 drivers/gpio/gpiolib-cdev.c | 90 ++++++++++++++++++-------------------
 1 file changed, 45 insertions(+), 45 deletions(-)

Patch

diff --git a/drivers/gpio/gpiolib-cdev.c b/drivers/gpio/gpiolib-cdev.c
index 1e8e0a0a9b51..5f5b715ed7f7 100644
--- a/drivers/gpio/gpiolib-cdev.c
+++ b/drivers/gpio/gpiolib-cdev.c
@@ -828,8 +828,8 @@  struct gpio_chardev_data {
  */
 static long gpio_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
-	struct gpio_chardev_data *priv = file->private_data;
-	struct gpio_device *gdev = priv->gdev;
+	struct gpio_chardev_data *gcdev = file->private_data;
+	struct gpio_device *gdev = gcdev->gdev;
 	struct gpio_chip *gc = gdev->chip;
 	void __user *ip = (void __user *)arg;
 	struct gpio_desc *desc;
@@ -889,7 +889,7 @@  static long gpio_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 
 		hwgpio = gpio_chip_hwgpio(desc);
 
-		if (test_bit(hwgpio, priv->watched_lines))
+		if (test_bit(hwgpio, gcdev->watched_lines))
 			return -EBUSY;
 
 		gpio_desc_to_lineinfo(desc, &lineinfo);
@@ -897,7 +897,7 @@  static long gpio_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 		if (copy_to_user(ip, &lineinfo, sizeof(lineinfo)))
 			return -EFAULT;
 
-		set_bit(hwgpio, priv->watched_lines);
+		set_bit(hwgpio, gcdev->watched_lines);
 		return 0;
 	} else if (cmd == GPIO_GET_LINEINFO_UNWATCH_IOCTL) {
 		if (copy_from_user(&offset, ip, sizeof(offset)))
@@ -909,10 +909,10 @@  static long gpio_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 
 		hwgpio = gpio_chip_hwgpio(desc);
 
-		if (!test_bit(hwgpio, priv->watched_lines))
+		if (!test_bit(hwgpio, gcdev->watched_lines))
 			return -EBUSY;
 
-		clear_bit(hwgpio, priv->watched_lines);
+		clear_bit(hwgpio, gcdev->watched_lines);
 		return 0;
 	}
 	return -EINVAL;
@@ -935,12 +935,12 @@  to_gpio_chardev_data(struct notifier_block *nb)
 static int lineinfo_changed_notify(struct notifier_block *nb,
 				   unsigned long action, void *data)
 {
-	struct gpio_chardev_data *priv = to_gpio_chardev_data(nb);
+	struct gpio_chardev_data *gcdev = to_gpio_chardev_data(nb);
 	struct gpioline_info_changed chg;
 	struct gpio_desc *desc = data;
 	int ret;
 
-	if (!test_bit(gpio_chip_hwgpio(desc), priv->watched_lines))
+	if (!test_bit(gpio_chip_hwgpio(desc), gcdev->watched_lines))
 		return NOTIFY_DONE;
 
 	memset(&chg, 0, sizeof(chg));
@@ -949,9 +949,9 @@  static int lineinfo_changed_notify(struct notifier_block *nb,
 	chg.timestamp = ktime_get_ns();
 	gpio_desc_to_lineinfo(desc, &chg.info);
 
-	ret = kfifo_in_spinlocked(&priv->events, &chg, 1, &priv->wait.lock);
+	ret = kfifo_in_spinlocked(&gcdev->events, &chg, 1, &gcdev->wait.lock);
 	if (ret)
-		wake_up_poll(&priv->wait, EPOLLIN);
+		wake_up_poll(&gcdev->wait, EPOLLIN);
 	else
 		pr_debug_ratelimited("lineinfo event FIFO is full - event dropped\n");
 
@@ -961,13 +961,13 @@  static int lineinfo_changed_notify(struct notifier_block *nb,
 static __poll_t lineinfo_watch_poll(struct file *file,
 				    struct poll_table_struct *pollt)
 {
-	struct gpio_chardev_data *priv = file->private_data;
+	struct gpio_chardev_data *gcdev = file->private_data;
 	__poll_t events = 0;
 
-	poll_wait(file, &priv->wait, pollt);
+	poll_wait(file, &gcdev->wait, pollt);
 
-	if (!kfifo_is_empty_spinlocked_noirqsave(&priv->events,
-						 &priv->wait.lock))
+	if (!kfifo_is_empty_spinlocked_noirqsave(&gcdev->events,
+						 &gcdev->wait.lock))
 		events = EPOLLIN | EPOLLRDNORM;
 
 	return events;
@@ -976,7 +976,7 @@  static __poll_t lineinfo_watch_poll(struct file *file,
 static ssize_t lineinfo_watch_read(struct file *file, char __user *buf,
 				   size_t count, loff_t *off)
 {
-	struct gpio_chardev_data *priv = file->private_data;
+	struct gpio_chardev_data *gcdev = file->private_data;
 	struct gpioline_info_changed event;
 	ssize_t bytes_read = 0;
 	int ret;
@@ -985,28 +985,28 @@  static ssize_t lineinfo_watch_read(struct file *file, char __user *buf,
 		return -EINVAL;
 
 	do {
-		spin_lock(&priv->wait.lock);
-		if (kfifo_is_empty(&priv->events)) {
+		spin_lock(&gcdev->wait.lock);
+		if (kfifo_is_empty(&gcdev->events)) {
 			if (bytes_read) {
-				spin_unlock(&priv->wait.lock);
+				spin_unlock(&gcdev->wait.lock);
 				return bytes_read;
 			}
 
 			if (file->f_flags & O_NONBLOCK) {
-				spin_unlock(&priv->wait.lock);
+				spin_unlock(&gcdev->wait.lock);
 				return -EAGAIN;
 			}
 
-			ret = wait_event_interruptible_locked(priv->wait,
-					!kfifo_is_empty(&priv->events));
+			ret = wait_event_interruptible_locked(gcdev->wait,
+					!kfifo_is_empty(&gcdev->events));
 			if (ret) {
-				spin_unlock(&priv->wait.lock);
+				spin_unlock(&gcdev->wait.lock);
 				return ret;
 			}
 		}
 
-		ret = kfifo_out(&priv->events, &event, 1);
-		spin_unlock(&priv->wait.lock);
+		ret = kfifo_out(&gcdev->events, &event, 1);
+		spin_unlock(&gcdev->wait.lock);
 		if (ret != 1) {
 			ret = -EIO;
 			break;
@@ -1031,33 +1031,33 @@  static int gpio_chrdev_open(struct inode *inode, struct file *file)
 {
 	struct gpio_device *gdev = container_of(inode->i_cdev,
 						struct gpio_device, chrdev);
-	struct gpio_chardev_data *priv;
+	struct gpio_chardev_data *gcdev;
 	int ret = -ENOMEM;
 
 	/* Fail on open if the backing gpiochip is gone */
 	if (!gdev->chip)
 		return -ENODEV;
 
-	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
-	if (!priv)
+	gcdev = kzalloc(sizeof(*gcdev), GFP_KERNEL);
+	if (!gcdev)
 		return -ENOMEM;
 
-	priv->watched_lines = bitmap_zalloc(gdev->chip->ngpio, GFP_KERNEL);
-	if (!priv->watched_lines)
-		goto out_free_priv;
+	gcdev->watched_lines = bitmap_zalloc(gdev->chip->ngpio, GFP_KERNEL);
+	if (!gcdev->watched_lines)
+		goto out_free_gcdev;
 
-	init_waitqueue_head(&priv->wait);
-	INIT_KFIFO(priv->events);
-	priv->gdev = gdev;
+	init_waitqueue_head(&gcdev->wait);
+	INIT_KFIFO(gcdev->events);
+	gcdev->gdev = gdev;
 
-	priv->lineinfo_changed_nb.notifier_call = lineinfo_changed_notify;
+	gcdev->lineinfo_changed_nb.notifier_call = lineinfo_changed_notify;
 	ret = atomic_notifier_chain_register(&gdev->notifier,
-					     &priv->lineinfo_changed_nb);
+					     &gcdev->lineinfo_changed_nb);
 	if (ret)
 		goto out_free_bitmap;
 
 	get_device(&gdev->dev);
-	file->private_data = priv;
+	file->private_data = gcdev;
 
 	ret = nonseekable_open(inode, file);
 	if (ret)
@@ -1067,11 +1067,11 @@  static int gpio_chrdev_open(struct inode *inode, struct file *file)
 
 out_unregister_notifier:
 	atomic_notifier_chain_unregister(&gdev->notifier,
-					 &priv->lineinfo_changed_nb);
+					 &gcdev->lineinfo_changed_nb);
 out_free_bitmap:
-	bitmap_free(priv->watched_lines);
-out_free_priv:
-	kfree(priv);
+	bitmap_free(gcdev->watched_lines);
+out_free_gcdev:
+	kfree(gcdev);
 	return ret;
 }
 
@@ -1083,14 +1083,14 @@  static int gpio_chrdev_open(struct inode *inode, struct file *file)
  */
 static int gpio_chrdev_release(struct inode *inode, struct file *file)
 {
-	struct gpio_chardev_data *priv = file->private_data;
-	struct gpio_device *gdev = priv->gdev;
+	struct gpio_chardev_data *gcdev = file->private_data;
+	struct gpio_device *gdev = gcdev->gdev;
 
-	bitmap_free(priv->watched_lines);
+	bitmap_free(gcdev->watched_lines);
 	atomic_notifier_chain_unregister(&gdev->notifier,
-					 &priv->lineinfo_changed_nb);
+					 &gcdev->lineinfo_changed_nb);
 	put_device(&gdev->dev);
-	kfree(priv);
+	kfree(gcdev);
 
 	return 0;
 }