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[PATCH] hpet-RTC: disable interrupt when no longer needed
When the emulated RTC interrupt is no longer needed, we better disable it; otherwise, we get a spurious interrupt whenever the timer has rolled over and reaches the same comparator value. Having a superfluous interrupt every five minutes doesn't hurt much, but it's bad style anyway. ;-) Signed-off-by: Clemens Ladisch <clemens@ladisch.de> Acked-by: "Pallipadi, Venkatesh" <venkatesh.pallipadi@intel.com> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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0d29086177
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2 changed files with 10 additions and 2 deletions
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@ -319,8 +319,12 @@ static void hpet_rtc_timer_reinit(void)
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{
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unsigned int cfg, cnt;
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if (!(PIE_on | AIE_on | UIE_on))
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if (unlikely(!(PIE_on | AIE_on | UIE_on))) {
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cfg = hpet_readl(HPET_T1_CFG);
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cfg &= ~HPET_TN_ENABLE;
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hpet_writel(cfg, HPET_T1_CFG);
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return;
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}
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if (PIE_on && (PIE_freq > DEFAULT_RTC_INT_FREQ))
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hpet_rtc_int_freq = PIE_freq;
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@ -1138,8 +1138,12 @@ static void hpet_rtc_timer_reinit(void)
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{
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unsigned int cfg, cnt;
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if (!(PIE_on | AIE_on | UIE_on))
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if (unlikely(!(PIE_on | AIE_on | UIE_on))) {
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cfg = hpet_readl(HPET_T1_CFG);
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cfg &= ~HPET_TN_ENABLE;
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hpet_writel(cfg, HPET_T1_CFG);
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return;
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}
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if (PIE_on && (PIE_freq > DEFAULT_RTC_INT_FREQ))
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hpet_rtc_int_freq = PIE_freq;
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