[ACPI] fix processor_core.c for NR_CPUS > 256

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

Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c
index 4217925..ac2dfa6 100644 (file)
--- a/drivers/acpi/processor_core.c
+++ b/drivers/acpi/processor_core.c
@@ -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);