[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>

1 files changed, 6 insertions, 16 deletions

diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c
index 56e490709b87..579cd667b16f 100644
--- a/drivers/rtc/interface.c
+++ b/drivers/rtc/interface.c
@@ -229,6 +229,9 @@ int rtc_irq_set_state(struct class_device *class_dev, struct rtc_task *task, int
         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 @@ EXPORT_SYMBOL_GPL(rtc_irq_set_state);
 
 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)