[PATCH] Remove old "focus disabled" chipset errata workaround
The new systems already use focus disabled and the comment was completely outdated. Signed-off-by: Andi Kleen <ak@suse.de>
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@ -399,32 +399,8 @@ void __cpuinit setup_local_APIC (void)
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*/
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*/
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value |= APIC_SPIV_APIC_ENABLED;
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value |= APIC_SPIV_APIC_ENABLED;
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/*
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/* We always use processor focus */
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* Some unknown Intel IO/APIC (or APIC) errata are biting us with
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* certain networking cards. If high frequency interrupts are
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* happening on a particular IOAPIC pin, plus the IOAPIC routing
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* entry is masked/unmasked at a high rate as well then sooner or
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* later IOAPIC line gets 'stuck', no more interrupts are received
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* from the device. If focus CPU is disabled then the hang goes
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* away, oh well :-(
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*
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* [ This bug can be reproduced easily with a level-triggered
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* PCI Ne2000 networking cards and PII/PIII processors, dual
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* BX chipset. ]
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*/
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/*
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* Actually disabling the focus CPU check just makes the hang less
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* frequent as it makes the interrupt distributon model be more
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* like LRU than MRU (the short-term load is more even across CPUs).
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* See also the comment in end_level_ioapic_irq(). --macro
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*/
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#if 1
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/* Enable focus processor (bit==0) */
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value &= ~APIC_SPIV_FOCUS_DISABLED;
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#else
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/* Disable focus processor (bit==1) */
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value |= APIC_SPIV_FOCUS_DISABLED;
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#endif
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/*
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/*
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* Set spurious IRQ vector
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* Set spurious IRQ vector
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*/
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*/
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