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authorPekka Enberg <penberg@kernel.org>2012-01-11 21:11:29 +0200
committerPekka Enberg <penberg@kernel.org>2012-01-11 21:11:29 +0200
commit5878cf431ca7233a56819ca6970153ac0b129599 (patch)
treee5d21d04a0b468d2dabbe3a3824f23b5537fc6a7 /arch/x86/kernel/hpet.c
parent74ee4ef1f901fbb014bdcdc9171d126490ce2b62 (diff)
parentb13683d1cc14d1dd30b8e20f3ebea3f814ad029f (diff)
downloadlinux-5878cf431ca7233a56819ca6970153ac0b129599.tar.bz2
Merge branch 'slab/urgent' into slab/for-linus
Diffstat (limited to 'arch/x86/kernel/hpet.c')
-rw-r--r--arch/x86/kernel/hpet.c21
1 files changed, 14 insertions, 7 deletions
diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
index b946a9eac7d9..1bb0bf4d92cd 100644
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -1049,6 +1049,14 @@ int hpet_rtc_timer_init(void)
}
EXPORT_SYMBOL_GPL(hpet_rtc_timer_init);
+static void hpet_disable_rtc_channel(void)
+{
+ unsigned long cfg;
+ cfg = hpet_readl(HPET_T1_CFG);
+ cfg &= ~HPET_TN_ENABLE;
+ hpet_writel(cfg, HPET_T1_CFG);
+}
+
/*
* The functions below are called from rtc driver.
* Return 0 if HPET is not being used.
@@ -1060,6 +1068,9 @@ int hpet_mask_rtc_irq_bit(unsigned long bit_mask)
return 0;
hpet_rtc_flags &= ~bit_mask;
+ if (unlikely(!hpet_rtc_flags))
+ hpet_disable_rtc_channel();
+
return 1;
}
EXPORT_SYMBOL_GPL(hpet_mask_rtc_irq_bit);
@@ -1125,15 +1136,11 @@ EXPORT_SYMBOL_GPL(hpet_rtc_dropped_irq);
static void hpet_rtc_timer_reinit(void)
{
- unsigned int cfg, delta;
+ unsigned int delta;
int lost_ints = -1;
- if (unlikely(!hpet_rtc_flags)) {
- cfg = hpet_readl(HPET_T1_CFG);
- cfg &= ~HPET_TN_ENABLE;
- hpet_writel(cfg, HPET_T1_CFG);
- return;
- }
+ if (unlikely(!hpet_rtc_flags))
+ hpet_disable_rtc_channel();
if (!(hpet_rtc_flags & RTC_PIE) || hpet_pie_limit)
delta = hpet_default_delta;