diff options
| author | Maciej W. Rozycki | 2008-05-21 23:10:22 +0200 |
|---|---|---|
| committer | Ingo Molnar | 2008-07-08 09:12:59 +0200 |
| commit | 35542c5ebced864776d90d83d1e255016fd4c084 (patch) | |
| tree | 2d190b468fbd76286762a25656452492b89acb9e /arch/x86/kernel/io_apic_32.c | |
| parent | x86: APIC/SMP: downgrade the NMI watchdog for "nosmp" (diff) | |
| download | kernel-qcow2-linux-35542c5ebced864776d90d83d1e255016fd4c084.tar.gz kernel-qcow2-linux-35542c5ebced864776d90d83d1e255016fd4c084.tar.xz kernel-qcow2-linux-35542c5ebced864776d90d83d1e255016fd4c084.zip | |
x86: I/O APIC: clean up the 8259A on a NMI watchdog failure
There is no point in keeping the 8259A enabled if the I/O APIC NMI
watchdog has failed and the 8259A is not used to pass through regular
timer interrupts. This fixes problems with some systems where some logic
gets confused.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/io_apic_32.c')
| -rw-r--r-- | arch/x86/kernel/io_apic_32.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kernel/io_apic_32.c b/arch/x86/kernel/io_apic_32.c index 41218ac75d10..7c7d88ebb966 100644 --- a/arch/x86/kernel/io_apic_32.c +++ b/arch/x86/kernel/io_apic_32.c @@ -58,6 +58,7 @@ static struct { int pin, apic; } ioapic_i8259 = { -1, -1 }; static DEFINE_SPINLOCK(ioapic_lock); static DEFINE_SPINLOCK(vector_lock); +int timer_through_8259 __initdata; /* * Is the SiS APIC rmw bug present ? @@ -2194,6 +2195,7 @@ static inline void __init check_timer(void) enable_8259A_irq(0); if (timer_irq_works()) { printk("works.\n"); + timer_through_8259 = 1; if (pin1 != -1) replace_pin_at_irq(0, apic1, pin1, apic2, pin2); else |