[ACPI] fix 2.6.13 boot hang regression on HT box w/ broken BIOS
http://bugzilla.kernel.org/show_bug.cgi?id=5452 Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
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@ -543,6 +543,8 @@ static int acpi_processor_get_info(struct acpi_processor *pr)
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return_VALUE(0);
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}
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static void *processor_device_array[NR_CPUS];
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static int acpi_processor_start(struct acpi_device *device)
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{
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int result = 0;
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@ -561,6 +563,19 @@ static int acpi_processor_start(struct acpi_device *device)
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BUG_ON((pr->id >= NR_CPUS) || (pr->id < 0));
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/*
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* Buggy BIOS check
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* ACPI id of processors can be reported wrongly by the BIOS.
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* Don't trust it blindly
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*/
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if (processor_device_array[pr->id] != NULL &&
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processor_device_array[pr->id] != (void *)device) {
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ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "BIOS reporting wrong ACPI id"
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"for the processor\n"));
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return_VALUE(-ENODEV);
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}
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processor_device_array[pr->id] = (void *)device;
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processors[pr->id] = pr;
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result = acpi_processor_add_fs(device);
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