From: Kent Gibson <warthog618@gmail.com>
To: linux-kernel@vger.kernel.org, linux-gpio@vger.kernel.org,
bgolaszewski@baylibre.com, linus.walleij@linaro.org
Cc: Kent Gibson <warthog618@gmail.com>
Subject: [PATCH 09/22] gpiolib: cdev: rename priv to gcdev
Date: Tue, 23 Jun 2020 12:00:54 +0800 [thread overview]
Message-ID: <20200623040107.22270-10-warthog618@gmail.com> (raw)
In-Reply-To: <20200623040107.22270-1-warthog618@gmail.com>
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(-)
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;
}
--
2.27.0
next prev parent reply other threads:[~2020-06-23 4:02 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-23 4:00 [PATCH 00/22] gpio: cdev: add uAPI V2 Kent Gibson
2020-06-23 4:00 ` [PATCH 01/22] gpiolib: move gpiolib-sysfs function declarations into their own header Kent Gibson
2020-06-24 13:34 ` Bartosz Golaszewski
2020-06-24 13:38 ` Kent Gibson
2020-06-23 4:00 ` [PATCH 02/22] gpiolib: cdev: sort includes Kent Gibson
2020-06-24 13:34 ` Bartosz Golaszewski
2020-06-23 4:00 ` [PATCH 03/22] gpiolib: cdev: minor indentation fixes Kent Gibson
2020-06-24 13:35 ` Bartosz Golaszewski
2020-06-23 4:00 ` [PATCH 04/22] gpiolib: cdev: refactor gpiohandle_flags_to_desc_flags Kent Gibson
2020-06-24 13:51 ` Bartosz Golaszewski
2020-06-23 4:00 ` [PATCH 05/22] gpiolib: cdev: rename 'filep' and 'filp' to 'file' to be consistent with other use Kent Gibson
2020-06-24 13:52 ` Bartosz Golaszewski
2020-06-23 4:00 ` [PATCH 06/22] gpiolib: cdev: rename numdescs to num_descs Kent Gibson
2020-06-24 13:53 ` Bartosz Golaszewski
2020-06-23 4:00 ` [PATCH 07/22] gpiolib: cdev: remove pointless decrement of i Kent Gibson
2020-06-24 13:53 ` Bartosz Golaszewski
2020-06-23 4:00 ` [PATCH 08/22] gpiolib: cdev: complete the irq/thread timestamp handshake Kent Gibson
2020-06-24 14:00 ` Bartosz Golaszewski
2020-06-24 14:08 ` Kent Gibson
2020-06-25 9:44 ` Bartosz Golaszewski
2020-06-25 10:01 ` Kent Gibson
2020-06-30 9:08 ` Bartosz Golaszewski
2020-06-23 4:00 ` Kent Gibson [this message]
2020-06-24 14:04 ` [PATCH 09/22] gpiolib: cdev: rename priv to gcdev Bartosz Golaszewski
2020-06-24 14:19 ` Kent Gibson
2020-06-24 14:20 ` Bartosz Golaszewski
2020-06-24 23:16 ` Kent Gibson
2020-06-25 10:26 ` Bartosz Golaszewski
2020-06-23 4:00 ` [PATCH 10/22] gpiolib: cdev: fix minor race in GET_LINEINFO_WATCH Kent Gibson
2020-06-24 14:05 ` Bartosz Golaszewski
2020-06-24 14:46 ` Andy Shevchenko
2020-06-24 15:57 ` Kent Gibson
2020-06-24 22:58 ` Kent Gibson
2020-06-25 8:44 ` Andy Shevchenko
2020-06-25 9:13 ` Kent Gibson
2020-06-25 9:23 ` Andy Shevchenko
2020-06-25 9:36 ` Kent Gibson
2020-06-23 4:00 ` [PATCH 11/22] gpiolib: cdev: remove recalculation of offset Kent Gibson
2020-06-30 8:56 ` Bartosz Golaszewski
2020-06-23 4:00 ` [PATCH 12/22] gpio: uapi: define GPIO_MAX_NAME_SIZE for array sizes Kent Gibson
2020-06-24 14:13 ` Bartosz Golaszewski
2020-06-23 4:00 ` [PATCH 13/22] gpio: uapi: define uAPI V2 Kent Gibson
2020-06-24 14:33 ` Andy Shevchenko
2020-06-24 15:40 ` Kent Gibson
2020-06-26 14:02 ` Kent Gibson
2020-06-24 14:36 ` Bartosz Golaszewski
2020-06-24 23:58 ` Kent Gibson
2020-06-23 4:00 ` [PATCH 14/22] gpiolib: make cdev a build option Kent Gibson
2020-06-29 14:25 ` Bartosz Golaszewski
2020-06-23 4:01 ` [PATCH 15/22] gpiolib: add build option for CDEV V1 ABI Kent Gibson
2020-06-29 14:26 ` Bartosz Golaszewski
2020-06-23 4:01 ` [PATCH 16/22] gpiolib: cdev: add V2 uAPI implementation to parity with V1 Kent Gibson
2020-06-23 17:44 ` Dan Carpenter
2020-06-23 23:23 ` Kent Gibson
2020-06-23 4:01 ` [PATCH 17/22] gpiolib: cdev: report edge detection in lineinfo Kent Gibson
2020-06-23 4:01 ` [PATCH 18/22] gpiolib: cdev: support setting debounce Kent Gibson
2020-06-23 4:01 ` [PATCH 19/22] gpio: uapi: document uAPI V1 as deprecated Kent Gibson
2020-06-23 4:01 ` [PATCH 20/22] tools: gpio: switch tools to V2 uAPI Kent Gibson
2020-06-23 4:01 ` [PATCH 21/22] tools: gpio: add debounce support to gpio-event-mon Kent Gibson
2020-06-23 4:01 ` [PATCH 22/22] tools: gpio: support monitoring multiple lines Kent Gibson
2020-06-30 10:43 ` Bartosz Golaszewski
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