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[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>
This commit is contained in:
Venkatesh Pallipadi 2005-10-21 19:22:00 -04:00 committed by Len Brown
parent d2149b5423
commit cd8e2b48da
1 changed files with 15 additions and 0 deletions
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15
drivers/acpi/processor_core.c
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@ -543,6 +543,8 @@ static int acpi_processor_get_info(struct acpi_processor *pr)
return_VALUE(0);
}
static void *processor_device_array[NR_CPUS];
static int acpi_processor_start(struct acpi_device *device)
{
int result = 0;
@ -561,6 +563,19 @@ static int acpi_processor_start(struct acpi_device *device)
BUG_ON((pr->id >= NR_CPUS) || (pr->id < 0));
/*
* Buggy BIOS check
* ACPI id of processors can be reported wrongly by the BIOS.
* Don't trust it blindly
*/
if (processor_device_array[pr->id] != NULL &&
processor_device_array[pr->id] != (void *)device) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "BIOS reporting wrong ACPI id"
"for the processor\n"));
return_VALUE(-ENODEV);
}
processor_device_array[pr->id] = (void *)device;
processors[pr->id] = pr;
result = acpi_processor_add_fs(device);