Disable the 8259A when routing of the timer interrupt through the chip to
the local APIC of the primary processor has failed.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
---
patch-2.6.26-rc1-20080505-timer-fasteoi-cleanup-0
diff -up --recursive --new-file linux-2.6.26-rc1-20080505.macro/arch/x86/kernel/io_apic_32.c linux-2.6.26-rc1-20080505/arch/x86/kernel/io_apic_32.c
--- linux-2.6.26-rc1-20080505.macro/arch/x86/kernel/io_apic_32.c 2008-05-21 18:51:28.000000000 +0000
+++ linux-2.6.26-rc1-20080505/arch/x86/kernel/io_apic_32.c 2008-05-21 18:52:36.000000000 +0000
@@ -2228,6 +2228,7 @@ static inline void __init check_timer(vo
printk(" works.\n");
goto out;
}
+ disable_8259A_irq(0);
apic_write_around(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_FIXED | vector);
printk(" failed.\n");
diff -up --recursive --new-file linux-2.6.26-rc1-20080505.macro/arch/x86/kernel/io_apic_64.c linux-2.6.26-rc1-20080505/arch/x86/kernel/io_apic_64.c
--- linux-2.6.26-rc1-20080505.macro/arch/x86/kernel/io_apic_64.c 2008-05-18 00:24:43.000000000 +0000
+++ linux-2.6.26-rc1-20080505/arch/x86/kernel/io_apic_64.c 2008-05-21 19:00:05.000000000 +0000
@@ -1729,6 +1729,7 @@ static inline void __init check_timer(vo
apic_printk(APIC_VERBOSE," works.\n");
goto out;
}
+ disable_8259A_irq(0);
apic_write(APIC_LVT0, APIC_LVT_MASKED | APIC_DM_FIXED | cfg->vector);
apic_printk(APIC_VERBOSE," failed.\n");
--
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