[patch 3/3] rtc: Limit frequency

[Thomas Gleixner]

The RTC hrtimer is self rearming. We really need to limit the
frequency to something sensible.

Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxx
---
 drivers/rtc/interface.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux-2.6/drivers/rtc/interface.c
===================================================================
--- linux-2.6.orig/drivers/rtc/interface.c
+++ linux-2.6/drivers/rtc/interface.c
@@ -708,7 +708,7 @@ int rtc_irq_set_freq(struct rtc_device *
 	int err = 0;
 	unsigned long flags;
 
-	if (freq <= 0)
+	if (freq <= 0 || freq > 5000)
 		return -EINVAL;
 retry:
 	spin_lock_irqsave(&rtc->irq_task_lock, flags);


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