1 files changed, 1 insertions, 1 deletions

diff --git a/arch/x86/kernel/tsc_msr.c b/arch/x86/kernel/tsc_msr.c
index 92ae6acac8a7..6aa0f4d9eea6 100644
--- a/arch/x86/kernel/tsc_msr.c
+++ b/arch/x86/kernel/tsc_msr.c
@@ -92,7 +92,7 @@ unsigned long try_msr_calibrate_tsc(void)
 
         if (freq_desc_tables[cpu_index].msr_plat) {
                 rdmsr(MSR_PLATFORM_INFO, lo, hi);
-                ratio = (lo >> 8) & 0x1f;
+                ratio = (lo >> 8) & 0xff;
         } else {
                 rdmsr(MSR_IA32_PERF_STATUS, lo, hi);
                 ratio = (hi >> 8) & 0x1f;