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x86, irq: don't call mp_config_acpi_gsi() if update_mptable is not enabled

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Len expressed concern that the update_mptable feature has
side-effects on the ACPI code.

Make it sure explicitly that the code only ever gets called if
the (default disabled) update_mptable boot quirk option is
disabled.

[ Impact: isolate the update_mptable feature from ACPI code more ]

Signed-off-by: Yinghai Lu <yinghai@kernel.org>
Cc: Len Brown <lenb@kernel.org>
LKML-Reference: <4A0DC832.5090200@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Yinghai Lu 2009-05-15 13:05:16 -07:00 committed by Ingo Molnar
parent 629e15d245
commit f1bdb52388
3 changed files with 13 additions and 2 deletions
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9
arch/x86/include/asm/mpspec.h
View File

@ -87,6 +87,15 @@ static inline int acpi_probe_gsi(void)
}
#endif /* CONFIG_ACPI */
#ifdef CONFIG_X86_MPPARSE
extern int enable_update_mptable;
#else
static inline int enable_update_mptable(void)
{
return 0;
}
#endif
#define PHYSID_ARRAY_SIZE BITS_TO_LONGS(MAX_APICS)
struct physid_mask {

4
arch/x86/kernel/acpi/boot.c
View File

@ -1226,7 +1226,9 @@ int mp_register_gsi(struct device *dev, u32 gsi, int trigger, int polarity)
ioapic_pin);
return gsi;
}
mp_config_acpi_gsi(dev, gsi, trigger, polarity);
if (enable_update_mptable)
mp_config_acpi_gsi(dev, gsi, trigger, polarity);
set_io_apic_irq_attr(&irq_attr, ioapic, ioapic_pin,
trigger == ACPI_EDGE_SENSITIVE ? 0 : 1,

2
arch/x86/kernel/mpparse.c
View File

@ -957,7 +957,7 @@ out:
return 0;
}
static int __initdata enable_update_mptable;
int enable_update_mptable;
static int __init update_mptable_setup(char *str)
{