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| author | Andi Kleen <ak@suse.de> | 2006-02-03 21:51:53 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-02-04 16:43:15 -0800 |
| commit | 3777a95903953c55f2309a89679b73c19ae5535b (patch) | |
| tree | 45a922a1ff82fc0f3d2a3865bfcb23d68c12792c /arch/i386 | |
| parent | 7f66ae48de27bc9506cff0f2991d74901a0c2f8d (diff) | |
| download | op-kernel-dev-3777a95903953c55f2309a89679b73c19ae5535b.zip op-kernel-dev-3777a95903953c55f2309a89679b73c19ae5535b.tar.gz | |
[PATCH] i386/x86-64: Don't ack the APIC for bad interrupts when the APIC is not enabled
It's bad juju to touch the APIC when it hasn't been enabled.
I also moved ack_bad_irq for x86-64 out of line following i386.
Signed-off-by: Andi Kleen <ak@suse.de>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/i386')
| -rw-r--r-- | arch/i386/kernel/apic.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/i386/kernel/apic.c b/arch/i386/kernel/apic.c index acd3f1e..98a5c23 100644 --- a/arch/i386/kernel/apic.c +++ b/arch/i386/kernel/apic.c @@ -75,8 +75,10 @@ void ack_bad_irq(unsigned int irq) * holds up an irq slot - in excessive cases (when multiple * unexpected vectors occur) that might lock up the APIC * completely. + * But only ack when the APIC is enabled -AK */ - ack_APIC_irq(); + if (!cpu_has_apic) + ack_APIC_irq(); } void __init apic_intr_init(void) @@ -1303,6 +1305,7 @@ int __init APIC_init_uniprocessor (void) if (!cpu_has_apic && APIC_INTEGRATED(apic_version[boot_cpu_physical_apicid])) { printk(KERN_ERR "BIOS bug, local APIC #%d not detected!...\n", boot_cpu_physical_apicid); + clear_bit(X86_FEATURE_APIC, boot_cpu_data.x86_capability); return -1; } |
