From 24742ece8eb01b5855059020ba1c09173fd9b732 Mon Sep 17 00:00:00 2001 From: "Maciej W. Rozycki" Date: Tue, 27 May 2008 21:19:40 +0100 Subject: [PATCH] x86: I/O APIC: unmask the second-chance timer interrupt Unmask the timer interrupt line set up in the through-8259A mode explicitly after setup_timer_IRQ0_pin() has set up the I/O APIC interrupt redirection entry to let the two operations be unbound from each other. Signed-off-by: Maciej W. Rozycki Signed-off-by: Ingo Molnar --- arch/x86/kernel/io_apic_32.c | 1 + arch/x86/kernel/io_apic_64.c | 1 + 2 files changed, 2 insertions(+) diff --git a/arch/x86/kernel/io_apic_32.c b/arch/x86/kernel/io_apic_32.c index ce682e8..b381f93 100644 --- a/arch/x86/kernel/io_apic_32.c +++ b/arch/x86/kernel/io_apic_32.c @@ -2185,6 +2185,7 @@ static inline void __init check_timer(void) * legacy devices should be connected to IO APIC #0 */ setup_timer_IRQ0_pin(apic2, pin2, vector); + unmask_IO_APIC_irq(0); enable_8259A_irq(0); if (timer_irq_works()) { printk("works.\n"); diff --git a/arch/x86/kernel/io_apic_64.c b/arch/x86/kernel/io_apic_64.c index 6c4635f..0e20b7d 100644 --- a/arch/x86/kernel/io_apic_64.c +++ b/arch/x86/kernel/io_apic_64.c @@ -1691,6 +1691,7 @@ static inline void __init check_timer(void) * legacy devices should be connected to IO APIC #0 */ setup_timer_IRQ0_pin(apic2, pin2, cfg->vector); + unmask_IO_APIC_irq(0); enable_8259A_irq(0); if (timer_irq_works()) { apic_printk(APIC_VERBOSE," works.\n"); -- 2.7.4