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path: root/drivers/input/misc/uinput.c
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Diffstat (limited to 'drivers/input/misc/uinput.c')
-rw-r--r--drivers/input/misc/uinput.c81
1 files changed, 35 insertions, 46 deletions
diff --git a/drivers/input/misc/uinput.c b/drivers/input/misc/uinput.c
index 98710997aaa..9c3d20073ae 100644
--- a/drivers/input/misc/uinput.c
+++ b/drivers/input/misc/uinput.c
@@ -36,16 +36,6 @@
#include <linux/miscdevice.h>
#include <linux/uinput.h>
-static int uinput_dev_open(struct input_dev *dev)
-{
- return 0;
-}
-
-static void uinput_dev_close(struct input_dev *dev)
-{
-
-}
-
static int uinput_dev_event(struct input_dev *dev, unsigned int type, unsigned int code, int value)
{
struct uinput_device *udev;
@@ -68,17 +58,20 @@ static int uinput_request_alloc_id(struct input_dev *dev, struct uinput_request
/* Atomically allocate an ID for the given request. Returns 0 on success. */
struct uinput_device *udev = dev->private;
int id;
+ int err = -1;
down(&udev->requests_sem);
- for (id=0; id<UINPUT_NUM_REQUESTS; id++)
+
+ for (id = 0; id < UINPUT_NUM_REQUESTS; id++)
if (!udev->requests[id]) {
udev->requests[id] = request;
request->id = id;
- up(&udev->requests_sem);
- return 0;
+ err = 0;
+ break;
}
+
up(&udev->requests_sem);
- return -1;
+ return err;
}
static struct uinput_request* uinput_request_find(struct uinput_device *udev, int id)
@@ -101,7 +94,7 @@ static void uinput_request_init(struct input_dev *dev, struct uinput_request *re
/* Allocate an ID. If none are available right away, wait. */
request->retval = wait_event_interruptible(udev->requests_waitq,
- !uinput_request_alloc_id(dev, request));
+ !uinput_request_alloc_id(dev, request));
}
static void uinput_request_submit(struct input_dev *dev, struct uinput_request *request)
@@ -159,32 +152,30 @@ static int uinput_create_device(struct uinput_device *udev)
return -EINVAL;
}
- udev->dev->open = uinput_dev_open;
- udev->dev->close = uinput_dev_close;
udev->dev->event = uinput_dev_event;
udev->dev->upload_effect = uinput_dev_upload_effect;
udev->dev->erase_effect = uinput_dev_erase_effect;
udev->dev->private = udev;
- init_waitqueue_head(&(udev->waitq));
+ init_waitqueue_head(&udev->waitq);
input_register_device(udev->dev);
- set_bit(UIST_CREATED, &(udev->state));
+ set_bit(UIST_CREATED, &udev->state);
return 0;
}
static int uinput_destroy_device(struct uinput_device *udev)
{
- if (!test_bit(UIST_CREATED, &(udev->state))) {
+ if (!test_bit(UIST_CREATED, &udev->state)) {
printk(KERN_WARNING "%s: create the device first\n", UINPUT_NAME);
return -EINVAL;
}
input_unregister_device(udev->dev);
- clear_bit(UIST_CREATED, &(udev->state));
+ clear_bit(UIST_CREATED, &udev->state);
return 0;
}
@@ -253,15 +244,15 @@ static int uinput_alloc_device(struct file *file, const char __user *buffer, siz
struct uinput_user_dev *user_dev;
struct input_dev *dev;
struct uinput_device *udev;
- int size,
- retval;
+ int size;
+ int retval;
retval = count;
udev = file->private_data;
dev = udev->dev;
- user_dev = kmalloc(sizeof(*user_dev), GFP_KERNEL);
+ user_dev = kmalloc(sizeof(struct uinput_user_dev), GFP_KERNEL);
if (!user_dev) {
retval = -ENOMEM;
goto exit;
@@ -272,7 +263,7 @@ static int uinput_alloc_device(struct file *file, const char __user *buffer, siz
goto exit;
}
- if (NULL != dev->name)
+ if (dev->name)
kfree(dev->name);
size = strnlen(user_dev->name, UINPUT_MAX_NAME_SIZE) + 1;
@@ -314,14 +305,13 @@ static ssize_t uinput_write(struct file *file, const char __user *buffer, size_t
{
struct uinput_device *udev = file->private_data;
- if (test_bit(UIST_CREATED, &(udev->state))) {
+ if (test_bit(UIST_CREATED, &udev->state)) {
struct input_event ev;
if (copy_from_user(&ev, buffer, sizeof(struct input_event)))
return -EFAULT;
input_event(udev->dev, ev.type, ev.code, ev.value);
- }
- else
+ } else
count = uinput_alloc_device(file, buffer, count);
return count;
@@ -332,26 +322,24 @@ static ssize_t uinput_read(struct file *file, char __user *buffer, size_t count,
struct uinput_device *udev = file->private_data;
int retval = 0;
- if (!test_bit(UIST_CREATED, &(udev->state)))
+ if (!test_bit(UIST_CREATED, &udev->state))
return -ENODEV;
- if ((udev->head == udev->tail) && (file->f_flags & O_NONBLOCK))
+ if (udev->head == udev->tail && (file->f_flags & O_NONBLOCK))
return -EAGAIN;
retval = wait_event_interruptible(udev->waitq,
- (udev->head != udev->tail) ||
- !test_bit(UIST_CREATED, &(udev->state)));
-
+ udev->head != udev->tail || !test_bit(UIST_CREATED, &udev->state));
if (retval)
return retval;
- if (!test_bit(UIST_CREATED, &(udev->state)))
+ if (!test_bit(UIST_CREATED, &udev->state))
return -ENODEV;
while ((udev->head != udev->tail) &&
(retval + sizeof(struct input_event) <= count)) {
- if (copy_to_user(buffer + retval, &(udev->buff[udev->tail]),
- sizeof(struct input_event))) return -EFAULT;
+ if (copy_to_user(buffer + retval, &udev->buff[udev->tail], sizeof(struct input_event)))
+ return -EFAULT;
udev->tail = (udev->tail + 1) % UINPUT_BUFFER_SIZE;
retval += sizeof(struct input_event);
}
@@ -373,12 +361,12 @@ static unsigned int uinput_poll(struct file *file, poll_table *wait)
static int uinput_burn_device(struct uinput_device *udev)
{
- if (test_bit(UIST_CREATED, &(udev->state)))
+ if (test_bit(UIST_CREATED, &udev->state))
uinput_destroy_device(udev);
- if (NULL != udev->dev->name)
+ if (udev->dev->name)
kfree(udev->dev->name);
- if (NULL != udev->dev->phys)
+ if (udev->dev->phys)
kfree(udev->dev->phys);
kfree(udev->dev);
@@ -389,7 +377,8 @@ static int uinput_burn_device(struct uinput_device *udev)
static int uinput_close(struct inode *inode, struct file *file)
{
- return uinput_burn_device(file->private_data);
+ uinput_burn_device(file->private_data);
+ return 0;
}
static int uinput_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg)
@@ -415,7 +404,7 @@ static int uinput_ioctl(struct inode *inode, struct file *file, unsigned int cmd
case UI_SET_SNDBIT:
case UI_SET_FFBIT:
case UI_SET_PHYS:
- if (test_bit(UIST_CREATED, &(udev->state)))
+ if (test_bit(UIST_CREATED, &udev->state))
return -EINVAL;
}
@@ -511,7 +500,7 @@ static int uinput_ioctl(struct inode *inode, struct file *file, unsigned int cmd
udev->dev->phys = NULL;
break;
}
- udev->dev->phys[length-1] = '\0';
+ udev->dev->phys[length - 1] = '\0';
break;
case UI_BEGIN_FF_UPLOAD:
@@ -520,7 +509,7 @@ static int uinput_ioctl(struct inode *inode, struct file *file, unsigned int cmd
break;
}
req = uinput_request_find(udev, ff_up.request_id);
- if (!(req && req->code==UI_FF_UPLOAD && req->u.effect)) {
+ if (!(req && req->code == UI_FF_UPLOAD && req->u.effect)) {
retval = -EINVAL;
break;
}
@@ -538,7 +527,7 @@ static int uinput_ioctl(struct inode *inode, struct file *file, unsigned int cmd
break;
}
req = uinput_request_find(udev, ff_erase.request_id);
- if (!(req && req->code==UI_FF_ERASE)) {
+ if (!(req && req->code == UI_FF_ERASE)) {
retval = -EINVAL;
break;
}
@@ -556,7 +545,7 @@ static int uinput_ioctl(struct inode *inode, struct file *file, unsigned int cmd
break;
}
req = uinput_request_find(udev, ff_up.request_id);
- if (!(req && req->code==UI_FF_UPLOAD && req->u.effect)) {
+ if (!(req && req->code == UI_FF_UPLOAD && req->u.effect)) {
retval = -EINVAL;
break;
}
@@ -572,7 +561,7 @@ static int uinput_ioctl(struct inode *inode, struct file *file, unsigned int cmd
break;
}
req = uinput_request_find(udev, ff_erase.request_id);
- if (!(req && req->code==UI_FF_ERASE)) {
+ if (!(req && req->code == UI_FF_ERASE)) {
retval = -EINVAL;
break;
}
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-29 18:55:22 +0000