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| author | Clemens Ladisch | 2005-10-31 00:03:35 +0100 |
|---|---|---|
| committer | Linus Torvalds | 2005-10-31 02:37:29 +0100 |
| commit | f00c96f313b07d2eb2845305b9a3395e14385767 (patch) | |
| tree | 94efe251de277aca3faf81b0334eb1c7eb5ca956 /arch/i386 | |
| parent | [PATCH] hpet: allow shared interrupts (diff) | |
| download | kernel-qcow2-linux-f00c96f313b07d2eb2845305b9a3395e14385767.tar.gz kernel-qcow2-linux-f00c96f313b07d2eb2845305b9a3395e14385767.tar.xz kernel-qcow2-linux-f00c96f313b07d2eb2845305b9a3395e14385767.zip | |
[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>
Diffstat (limited to 'arch/i386')
| -rw-r--r-- | arch/i386/kernel/time_hpet.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/i386/kernel/time_hpet.c b/arch/i386/kernel/time_hpet.c index 658c0629ba6a..23e81fcbeaea 100644 --- a/arch/i386/kernel/time_hpet.c +++ b/arch/i386/kernel/time_hpet.c @@ -319,8 +319,12 @@ static void hpet_rtc_timer_reinit(void) { unsigned int cfg, cnt; - if (!(PIE_on | AIE_on | UIE_on)) + if (unlikely(!(PIE_on | AIE_on | UIE_on))) { + cfg = hpet_readl(HPET_T1_CFG); + cfg &= ~HPET_TN_ENABLE; + hpet_writel(cfg, HPET_T1_CFG); return; + } if (PIE_on && (PIE_freq > DEFAULT_RTC_INT_FREQ)) hpet_rtc_int_freq = PIE_freq; |