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Commit 9a31477a authored by Venkatesh Pallipadi's avatar Venkatesh Pallipadi Committed by Len Brown
Browse files

[ACPI] fix processor_core.c for NR_CPUS > 256 

http://bugzilla.kernel.org/show_bug.cgi?id=5128



Signed-off-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent dbed12da

drivers/acpi/processor_core.c

+12 −9
Original line number Diff line number Diff line
@@ -413,18 +413,20 @@ static int acpi_processor_remove_fs(struct acpi_device *device) 
#define ARCH_BAD_APICID		(0xff)

#endif



static u8 convert_acpiid_to_cpu(u8 acpi_id)

static int convert_acpiid_to_cpu(u8 acpi_id, unsigned int *cpu_index)

{

	u16 apic_id;

	int i;

	unsigned int i;



	apic_id = arch_acpiid_to_apicid[acpi_id];

	if (apic_id == ARCH_BAD_APICID)

		return -1;



	for (i = 0; i < NR_CPUS; i++) {

		if (arch_cpu_to_apicid[i] == apic_id)

			return i;

		if (arch_cpu_to_apicid[i] == apic_id) {

			*cpu_index = i;

			return 0;

		}

	}

	return -1;

}
@@ -439,7 +441,8 @@ static int acpi_processor_get_info(struct acpi_processor *pr) 
	acpi_status status = 0;

	union acpi_object object = { 0 };

	struct acpi_buffer buffer = { sizeof(union acpi_object), &object };

	u8 cpu_index;

	unsigned int  cpu_index;

	int retval;

	static int cpu0_initialized;



	ACPI_FUNCTION_TRACE("acpi_processor_get_info");
@@ -482,10 +485,10 @@ static int acpi_processor_get_info(struct acpi_processor *pr) 
	 */

	pr->acpi_id = object.processor.proc_id;



	cpu_index = convert_acpiid_to_cpu(pr->acpi_id);

	retval = convert_acpiid_to_cpu(pr->acpi_id, &cpu_index);



	/* Handle UP system running SMP kernel, with no LAPIC in MADT */

	if (!cpu0_initialized && (cpu_index == 0xff) &&

	if (!cpu0_initialized && retval &&

	    (num_online_cpus() == 1)) {

		cpu_index = 0;

	}
@@ -499,10 +502,10 @@ static int acpi_processor_get_info(struct acpi_processor *pr) 
	 *  less than the max # of CPUs. They should be ignored _iff

	 *  they are physically not present.

	 */

	if (cpu_index >= NR_CPUS) {

	if (retval) {

		if (ACPI_FAILURE

		    (acpi_processor_hotadd_init(pr->handle, &pr->id))) {

			ACPI_DEBUG_PRINT((ACPI_DB_ERROR,

			ACPI_DEBUG_PRINT((ACPI_DB_INFO,

					  "Error getting cpuindex for acpiid 0x%x\n",

					  pr->acpi_id));

			return_VALUE(-ENODEV);