diff options
| author | Alessandro Zummo <alessandro.zummo@towertech.it> | 2007-10-16 01:28:15 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-10-16 09:43:13 -0700 |
| commit | d691eb901e044065de10756ea78a5758d457c7fd (patch) | |
| tree | 3b166f4d54bba5677a04b885d0da52c28db3a8a3 /drivers/rtc/rtc-dev.c | |
| parent | 16a72c455a67bb23eed7292a31c6ba17729e78e6 (diff) | |
| download | linux-d691eb901e044065de10756ea78a5758d457c7fd.tar.bz2 | |
RTC: periodic irq fix
Add kernel/kernel and kernel/user locking for the periodic irq feature of
the rtc class.
PIE ioctls are also supported.
Signed-off-by: Alessandro Zummo <a.zummo@towertech.it>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/rtc/rtc-dev.c')
| -rw-r--r-- | drivers/rtc/rtc-dev.c | 33 |
1 files changed, 11 insertions, 22 deletions
diff --git a/drivers/rtc/rtc-dev.c b/drivers/rtc/rtc-dev.c index 005fff3a3508..362400db2e8b 100644 --- a/drivers/rtc/rtc-dev.c +++ b/drivers/rtc/rtc-dev.c @@ -238,17 +238,6 @@ static int rtc_dev_ioctl(struct inode *inode, struct file *file, break; } - /* avoid conflicting IRQ users */ - if (cmd == RTC_PIE_ON || cmd == RTC_PIE_OFF || cmd == RTC_IRQP_SET) { - spin_lock_irq(&rtc->irq_task_lock); - if (rtc->irq_task) - err = -EBUSY; - spin_unlock_irq(&rtc->irq_task_lock); - - if (err < 0) - return err; - } - /* try the driver's ioctl interface */ if (ops->ioctl) { err = ops->ioctl(rtc->dev.parent, cmd, arg); @@ -338,18 +327,20 @@ static int rtc_dev_ioctl(struct inode *inode, struct file *file, err = rtc_set_time(rtc, &tm); break; - case RTC_IRQP_READ: - if (ops->irq_set_freq) - err = put_user(rtc->irq_freq, (unsigned long __user *)uarg); - else - err = -ENOTTY; + case RTC_PIE_ON: + err = rtc_irq_set_state(rtc, NULL, 1); + break; + + case RTC_PIE_OFF: + err = rtc_irq_set_state(rtc, NULL, 0); break; case RTC_IRQP_SET: - if (ops->irq_set_freq) - err = rtc_irq_set_freq(rtc, rtc->irq_task, arg); - else - err = -ENOTTY; + err = rtc_irq_set_freq(rtc, NULL, arg); + break; + + case RTC_IRQP_READ: + err = put_user(rtc->irq_freq, (unsigned long __user *)uarg); break; #if 0 @@ -449,8 +440,6 @@ void rtc_dev_prepare(struct rtc_device *rtc) rtc->dev.devt = MKDEV(MAJOR(rtc_devt), rtc->id); 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); setup_timer(&rtc->uie_timer, rtc_uie_timer, (unsigned long)rtc); |