[PATCH] rtc subsystem, fix capability checks in kernel interface
Remove commented capability checks and add some others.
Signed-off-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c
index 56e4907..579cd66 100644
--- a/drivers/rtc/interface.c
+++ b/drivers/rtc/interface.c
@@ -229,6 +229,9 @@
unsigned long flags;
struct rtc_device *rtc = to_rtc_device(class_dev);
+ if (rtc->ops->irq_set_state == NULL)
+ return -ENXIO;
+
spin_lock_irqsave(&rtc->irq_task_lock, flags);
if (rtc->irq_task != task)
err = -ENXIO;
@@ -243,25 +246,12 @@
int rtc_irq_set_freq(struct class_device *class_dev, struct rtc_task *task, int freq)
{
- int err = 0, tmp = 0;
+ int err = 0;
unsigned long flags;
struct rtc_device *rtc = to_rtc_device(class_dev);
- /* allowed range is 2-8192 */
- if (freq < 2 || freq > 8192)
- return -EINVAL;
-/*
- FIXME: this does not belong here, will move where appropriate
- at a later stage. It cannot hurt right now, trust me :)
- if ((freq > rtc_max_user_freq) && (!capable(CAP_SYS_RESOURCE)))
- return -EACCES;
-*/
- /* check if freq is a power of 2 */
- while (freq > (1 << tmp))
- tmp++;
-
- if (freq != (1 << tmp))
- return -EINVAL;
+ if (rtc->ops->irq_set_freq == NULL)
+ return -ENXIO;
spin_lock_irqsave(&rtc->irq_task_lock, flags);
if (rtc->irq_task != task)