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path: root/drivers/char/rtc.c
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Diffstat (limited to 'drivers/char/rtc.c')
-rw-r--r--drivers/char/rtc.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/char/rtc.c b/drivers/char/rtc.c
index d8f9e94ae475..cd4fe8b1709f 100644
--- a/drivers/char/rtc.c
+++ b/drivers/char/rtc.c
@@ -1209,6 +1209,7 @@ static int rtc_proc_open(struct inode *inode, struct file *file)
void rtc_get_rtc_time(struct rtc_time *rtc_tm)
{
+ unsigned long uip_watchdog = jiffies;
unsigned char ctrl;
#ifdef CONFIG_MACH_DECSTATION
unsigned int real_year;
@@ -1224,8 +1225,10 @@ void rtc_get_rtc_time(struct rtc_time *rtc_tm)
* Once the read clears, read the RTC time (again via ioctl). Easy.
*/
- if (rtc_is_updating() != 0)
- msleep(20);
+ while (rtc_is_updating() != 0 && jiffies - uip_watchdog < 2*HZ/100) {
+ barrier();
+ cpu_relax();
+ }
/*
* Only the values that we read from the RTC are set. We leave