1 files changed, 5 insertions, 3 deletions

diff --git a/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c b/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c
index d2d9caf00a2f..5113e9231634 100644
--- a/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c
+++ b/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c
@@ -36,6 +36,7 @@
 
 #define dprintk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_DRIVER, "speedstep-centrino", msg)
 
+#define INTEL_MSR_RANGE (0xffff)
 
 struct cpu_id
 {
@@ -463,8 +464,9 @@ static int centrino_cpu_init_acpi(struct cpufreq_policy *policy)
         }
 
         for (i=0; i<p->state_count; i++) {
-                if (p->states[i].control != p->states[i].status) {
-                        dprintk("Different control (%llu) and status values (%llu)\n",
+                if ((p->states[i].control & INTEL_MSR_RANGE) !=
+                    (p->states[i].status & INTEL_MSR_RANGE)) {
+                        dprintk("Different MSR bits in control (%llu) and status (%llu)\n",
                                 p->states[i].control, p->states[i].status);
                         result = -EINVAL;
                         goto err_unreg;
@@ -500,7 +502,7 @@ static int centrino_cpu_init_acpi(struct cpufreq_policy *policy)
         }
 
         for (i=0; i<p->state_count; i++) {
-                centrino_model[cpu]->op_points[i].index = p->states[i].control;
+                centrino_model[cpu]->op_points[i].index = p->states[i].control & INTEL_MSR_RANGE;
                 centrino_model[cpu]->op_points[i].frequency = p->states[i].core_frequency * 1000;
                 dprintk("adding state %i with frequency %u and control value %04x\n", 
                         i, centrino_model[cpu]->op_points[i].frequency, centrino_model[cpu]->op_points[i].index);