diff options
Diffstat (limited to 'drivers/input/input.c')
-rw-r--r-- | drivers/input/input.c | 47 |
1 files changed, 37 insertions, 10 deletions
diff --git a/drivers/input/input.c b/drivers/input/input.c index 3385dd03abfc..7c4b4d37b3e6 100644 --- a/drivers/input/input.c +++ b/drivers/input/input.c @@ -219,10 +219,24 @@ void input_release_device(struct input_handle *handle) int input_open_device(struct input_handle *handle) { + struct input_dev *dev = handle->dev; + int err; + + err = down_interruptible(&dev->sem); + if (err) + return err; + handle->open++; - if (handle->dev->open) - return handle->dev->open(handle->dev); - return 0; + + if (!dev->users++ && dev->open) + err = dev->open(dev); + + if (err) + handle->open--; + + up(&dev->sem); + + return err; } int input_flush_device(struct input_handle* handle, struct file* file) @@ -235,10 +249,17 @@ int input_flush_device(struct input_handle* handle, struct file* file) void input_close_device(struct input_handle *handle) { + struct input_dev *dev = handle->dev; + input_release_device(handle); - if (handle->dev->close) - handle->dev->close(handle->dev); + + down(&dev->sem); + + if (!--dev->users && dev->close) + dev->close(dev); handle->open--; + + up(&dev->sem); } static void input_link_handle(struct input_handle *handle) @@ -415,6 +436,8 @@ void input_register_device(struct input_dev *dev) set_bit(EV_SYN, dev->evbit); + init_MUTEX(&dev->sem); + /* * If delay and period are pre-set by the driver, then autorepeating * is handled by the driver itself and we don't do it in input.c. @@ -674,6 +697,8 @@ static int input_handlers_read(char *buf, char **start, off_t pos, int count, in return (count > cnt) ? cnt : count; } +static struct file_operations input_fileops; + static int __init input_proc_init(void) { struct proc_dir_entry *entry; @@ -688,6 +713,8 @@ static int __init input_proc_init(void) return -ENOMEM; } entry->owner = THIS_MODULE; + input_fileops = *entry->proc_fops; + entry->proc_fops = &input_fileops; entry->proc_fops->poll = input_devices_poll; entry = create_proc_read_entry("handlers", 0, proc_bus_input_dir, input_handlers_read, NULL); if (entry == NULL) { @@ -702,13 +729,13 @@ static int __init input_proc_init(void) static inline int input_proc_init(void) { return 0; } #endif -struct class_simple *input_class; +struct class *input_class; static int __init input_init(void) { int retval = -ENOMEM; - input_class = class_simple_create(THIS_MODULE, "input"); + input_class = class_create(THIS_MODULE, "input"); if (IS_ERR(input_class)) return PTR_ERR(input_class); input_proc_init(); @@ -718,7 +745,7 @@ static int __init input_init(void) remove_proc_entry("devices", proc_bus_input_dir); remove_proc_entry("handlers", proc_bus_input_dir); remove_proc_entry("input", proc_bus); - class_simple_destroy(input_class); + class_destroy(input_class); return retval; } @@ -728,7 +755,7 @@ static int __init input_init(void) remove_proc_entry("handlers", proc_bus_input_dir); remove_proc_entry("input", proc_bus); unregister_chrdev(INPUT_MAJOR, "input"); - class_simple_destroy(input_class); + class_destroy(input_class); } return retval; } @@ -741,7 +768,7 @@ static void __exit input_exit(void) devfs_remove("input"); unregister_chrdev(INPUT_MAJOR, "input"); - class_simple_destroy(input_class); + class_destroy(input_class); } subsys_initcall(input_init); |