From: John Stultz Date: Fri, 22 Jul 2011 09:12:51 +0000 (+0000) Subject: rtc: Fix RTC PIE frequency limit X-Git-Tag: v3.0.5~181 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=1ed2053563d4d0bf70864a9df53c7a5dce7724e9;p=karo-tx-linux.git rtc: Fix RTC PIE frequency limit commit 938f97bcf1bdd1b681d5d14d1d7117a2e22d4434 upstream. 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 Cc: Thomas Gleixner Signed-off-by: John Stultz Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/rtc/interface.c b/drivers/rtc/interface.c index 3195dbd3ec34..eb4c88316a15 100644 --- a/drivers/rtc/interface.c +++ b/drivers/rtc/interface.c @@ -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); diff --git a/include/linux/rtc.h b/include/linux/rtc.h index b27ebea25660..93f4d035076b 100644 --- a/include/linux/rtc.h +++ b/include/linux/rtc.h @@ -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