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Commit 938f97bc authored by John Stultz's avatar John Stultz
Browse files

rtc: Fix RTC PIE frequency limit 



Thomas earlier submitted a fix to limit the RTC PIE freq, but
picked 5000Hz out of the air. Willy noticed that we should
instead use the 8192Hz max from the rtc man documentation.

Cc: Willy Tarreau <w@1wt.eu>
Cc: stable@kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarJohn Stultz <john.stultz@linaro.org>
parent 34d623d1

drivers/rtc/interface.c

+1 −1
Original line number Diff line number Diff line
@@ -708,7 +708,7 @@ int rtc_irq_set_freq(struct rtc_device *rtc, struct rtc_task *task, int freq) 
	int err = 0;

	unsigned long flags;



	if (freq <= 0 || freq > 5000)

	if (freq <= 0 || freq > RTC_MAX_FREQ)

		return -EINVAL;

retry:

	spin_lock_irqsave(&rtc->irq_task_lock, flags);

include/linux/rtc.h

+3 −0
Original line number Diff line number Diff line
@@ -97,6 +97,9 @@ struct rtc_pll_info { 
#define RTC_AF 0x20	/* Alarm interrupt */

#define RTC_UF 0x10	/* Update interrupt for 1Hz RTC */





#define RTC_MAX_FREQ	8192



#ifdef __KERNEL__



#include <linux/types.h>