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authorAlessandro Zummo <alessandro.zummo@towertech.it>2007-10-16 01:28:15 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-10-16 09:43:13 -0700
commitd691eb901e044065de10756ea78a5758d457c7fd (patch)
tree3b166f4d54bba5677a04b885d0da52c28db3a8a3 /drivers/rtc/rtc-dev.c
parent16a72c455a67bb23eed7292a31c6ba17729e78e6 (diff)
downloadlinux-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.c33
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);