#include <acpi/acpi_drivers.h>
#define _COMPONENT ACPI_SYSTEM_COMPONENT
-ACPI_MODULE_NAME ("event")
+ACPI_MODULE_NAME("event")
/* Global vars for handling event proc entry */
-static spinlock_t acpi_system_event_lock = SPIN_LOCK_UNLOCKED;
-int event_is_open = 0;
-extern struct list_head acpi_bus_event_list;
-extern wait_queue_head_t acpi_bus_event_queue;
+static DEFINE_SPINLOCK(acpi_system_event_lock);
+int event_is_open = 0;
+extern struct list_head acpi_bus_event_list;
+extern wait_queue_head_t acpi_bus_event_queue;
-static int
-acpi_system_open_event(struct inode *inode, struct file *file)
+static int acpi_system_open_event(struct inode *inode, struct file *file)
{
- spin_lock_irq (&acpi_system_event_lock);
+ spin_lock_irq(&acpi_system_event_lock);
- if(event_is_open)
+ if (event_is_open)
goto out_busy;
event_is_open = 1;
- spin_unlock_irq (&acpi_system_event_lock);
+ spin_unlock_irq(&acpi_system_event_lock);
return 0;
-out_busy:
- spin_unlock_irq (&acpi_system_event_lock);
+ out_busy:
+ spin_unlock_irq(&acpi_system_event_lock);
return -EBUSY;
}
static ssize_t
-acpi_system_read_event (
- struct file *file,
- char __user *buffer,
- size_t count,
- loff_t *ppos)
+acpi_system_read_event(struct file *file, char __user * buffer, size_t count,
+ loff_t * ppos)
{
- int result = 0;
- struct acpi_bus_event event;
- static char str[ACPI_MAX_STRING];
- static int chars_remaining = 0;
- static char *ptr;
+ int result = 0;
+ struct acpi_bus_event event;
+ static char str[ACPI_MAX_STRING];
+ static int chars_remaining = 0;
+ static char *ptr;
- ACPI_FUNCTION_TRACE("acpi_system_read_event");
-
if (!chars_remaining) {
memset(&event, 0, sizeof(struct acpi_bus_event));
if ((file->f_flags & O_NONBLOCK)
&& (list_empty(&acpi_bus_event_list)))
- return_VALUE(-EAGAIN);
+ return -EAGAIN;
result = acpi_bus_receive_event(&event);
- if (result) {
- return_VALUE(-EIO);
- }
-
- chars_remaining = sprintf(str, "%s %s %08x %08x\n",
- event.device_class?event.device_class:"<unknown>",
- event.bus_id?event.bus_id:"<unknown>",
- event.type, event.data);
+ if (result)
+ return result;
+
+ chars_remaining = sprintf(str, "%s %s %08x %08x\n",
+ event.device_class ? event.
+ device_class : "<unknown>",
+ event.bus_id ? event.
+ bus_id : "<unknown>", event.type,
+ event.data);
ptr = str;
}
}
if (copy_to_user(buffer, ptr, count))
- return_VALUE(-EFAULT);
+ return -EFAULT;
*ppos += count;
chars_remaining -= count;
ptr += count;
- return_VALUE(count);
+ return count;
}
-static int
-acpi_system_close_event(struct inode *inode, struct file *file)
+static int acpi_system_close_event(struct inode *inode, struct file *file)
{
- spin_lock_irq (&acpi_system_event_lock);
+ spin_lock_irq(&acpi_system_event_lock);
event_is_open = 0;
- spin_unlock_irq (&acpi_system_event_lock);
+ spin_unlock_irq(&acpi_system_event_lock);
return 0;
}
-static unsigned int
-acpi_system_poll_event(
- struct file *file,
- poll_table *wait)
+static unsigned int acpi_system_poll_event(struct file *file, poll_table * wait)
{
poll_wait(file, &acpi_bus_event_queue, wait);
if (!list_empty(&acpi_bus_event_list))
return 0;
}
-static struct file_operations acpi_system_event_ops = {
- .open = acpi_system_open_event,
- .read = acpi_system_read_event,
- .release = acpi_system_close_event,
- .poll = acpi_system_poll_event,
+static const struct file_operations acpi_system_event_ops = {
+ .open = acpi_system_open_event,
+ .read = acpi_system_read_event,
+ .release = acpi_system_close_event,
+ .poll = acpi_system_poll_event,
};
static int __init acpi_event_init(void)
{
- struct proc_dir_entry *entry;
+ struct proc_dir_entry *entry;
int error = 0;
- ACPI_FUNCTION_TRACE("acpi_event_init");
if (acpi_disabled)
- return_VALUE(0);
+ return 0;
/* 'event' [R] */
entry = create_proc_entry("event", S_IRUSR, acpi_root_dir);
if (entry)
entry->proc_fops = &acpi_system_event_ops;
else {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
- "Unable to create '%s' proc fs entry\n","event" ));
- error = -EFAULT;
+ error = -ENODEV;
}
- return_VALUE(error);
+ return error;
}
subsys_initcall(acpi_event_init);