return err;
}
-#ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL
-/*
- * Routine to poll RTC seconds field for change as often as possible,
- * after first RTC_UIE use timer to reduce polling
- */
-static void rtc_uie_task(void *data)
-{
- struct rtc_device *rtc = data;
- struct rtc_time tm;
- int num = 0;
- int err;
-
- err = rtc_read_time(&rtc->class_dev, &tm);
- spin_lock_irq(&rtc->irq_lock);
- if (rtc->stop_uie_polling || err) {
- rtc->uie_task_active = 0;
- } else if (rtc->oldsecs != tm.tm_sec) {
- num = (tm.tm_sec + 60 - rtc->oldsecs) % 60;
- rtc->oldsecs = tm.tm_sec;
- rtc->uie_timer.expires = jiffies + HZ - (HZ/10);
- rtc->uie_timer_active = 1;
- rtc->uie_task_active = 0;
- add_timer(&rtc->uie_timer);
- } else if (schedule_work(&rtc->uie_task) == 0) {
- rtc->uie_task_active = 0;
- }
- spin_unlock_irq(&rtc->irq_lock);
- if (num)
- rtc_update_irq(&rtc->class_dev, num, RTC_UF | RTC_IRQF);
-}
-
-static void rtc_uie_timer(unsigned long data)
-{
- struct rtc_device *rtc = (struct rtc_device *)data;
- unsigned long flags;
-
- spin_lock_irqsave(&rtc->irq_lock, flags);
- rtc->uie_timer_active = 0;
- rtc->uie_task_active = 1;
- if ((schedule_work(&rtc->uie_task) == 0))
- rtc->uie_task_active = 0;
- spin_unlock_irqrestore(&rtc->irq_lock, flags);
-}
-
-static void clear_uie(struct rtc_device *rtc)
-{
- spin_lock_irq(&rtc->irq_lock);
- if (rtc->irq_active) {
- rtc->stop_uie_polling = 1;
- if (rtc->uie_timer_active) {
- spin_unlock_irq(&rtc->irq_lock);
- del_timer_sync(&rtc->uie_timer);
- spin_lock_irq(&rtc->irq_lock);
- rtc->uie_timer_active = 0;
- }
- if (rtc->uie_task_active) {
- spin_unlock_irq(&rtc->irq_lock);
- flush_scheduled_work();
- spin_lock_irq(&rtc->irq_lock);
- }
- rtc->irq_active = 0;
- }
- spin_unlock_irq(&rtc->irq_lock);
-}
-
-static int set_uie(struct rtc_device *rtc)
-{
- struct rtc_time tm;
- int err;
-
- err = rtc_read_time(&rtc->class_dev, &tm);
- if (err)
- return err;
- spin_lock_irq(&rtc->irq_lock);
- if (!rtc->irq_active) {
- rtc->irq_active = 1;
- rtc->stop_uie_polling = 0;
- rtc->oldsecs = tm.tm_sec;
- rtc->uie_task_active = 1;
- if (schedule_work(&rtc->uie_task) == 0)
- rtc->uie_task_active = 0;
- }
- rtc->irq_data = 0;
- spin_unlock_irq(&rtc->irq_lock);
- return 0;
-}
-#endif /* CONFIG_RTC_INTF_DEV_UIE_EMUL */
static ssize_t
rtc_dev_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
struct rtc_wkalrm alarm;
void __user *uarg = (void __user *) arg;
- /* check that the calles has appropriate permissions
- * for certain ioctls. doing this check here is useful
- * to avoid duplicate code in each driver.
- */
- switch (cmd) {
- case RTC_EPOCH_SET:
- case RTC_SET_TIME:
- if (!capable(CAP_SYS_TIME))
- return -EACCES;
- break;
-
- case RTC_IRQP_SET:
- if (arg > rtc->max_user_freq && !capable(CAP_SYS_RESOURCE))
- return -EACCES;
- break;
-
- case RTC_PIE_ON:
- if (!capable(CAP_SYS_RESOURCE))
- return -EACCES;
- break;
- }
-
/* avoid conflicting IRQ users */
if (cmd == RTC_PIE_ON || cmd == RTC_PIE_OFF || cmd == RTC_IRQP_SET) {
spin_lock(&rtc->irq_task_lock);
break;
case RTC_SET_TIME:
+ if (!capable(CAP_SYS_TIME))
+ return -EACCES;
+
if (copy_from_user(&tm, uarg, sizeof(tm)))
return -EFAULT;
err = -EINVAL;
break;
}
+ if (!capable(CAP_SYS_TIME)) {
+ err = -EACCES;
+ break;
+ }
rtc_epoch = arg;
err = 0;
#endif
return -EFAULT;
break;
-#ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL
- case RTC_UIE_OFF:
- clear_uie(rtc);
- return 0;
-
- case RTC_UIE_ON:
- return set_uie(rtc);
-#endif
default:
err = -ENOTTY;
break;
{
struct rtc_device *rtc = to_rtc_device(file->private_data);
-#ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL
- clear_uie(rtc);
-#endif
if (rtc->ops->release)
rtc->ops->release(rtc->class_dev.dev);
mutex_init(&rtc->char_lock);
spin_lock_init(&rtc->irq_lock);
init_waitqueue_head(&rtc->irq_queue);
-#ifdef CONFIG_RTC_INTF_DEV_UIE_EMUL
- INIT_WORK(&rtc->uie_task, rtc_uie_task, rtc);
- setup_timer(&rtc->uie_timer, rtc_uie_timer, (unsigned long)rtc);
-#endif
cdev_init(&rtc->char_dev, &rtc_dev_fops);
rtc->char_dev.owner = rtc->owner;