releases/4.9.28/cpupower-fix-turbo-frequency-reporting-for-pre-sandy-bridge-cores.patch

   1 From 4cca0457686e4ee1677d69469e4ddfd94d389a80 Mon Sep 17 00:00:00 2001
   2 From: Ben Hutchings <ben@decadent.org.uk>
   3 Date: Tue, 11 Apr 2017 00:29:44 +0100
   4 Subject: cpupower: Fix turbo frequency reporting for pre-Sandy Bridge cores
   5
   6 From: Ben Hutchings <ben@decadent.org.uk>
   7
   8 commit 4cca0457686e4ee1677d69469e4ddfd94d389a80 upstream.
   9
  10 The switch that conditionally sets CPUPOWER_CAP_HAS_TURBO_RATIO and
  11 CPUPOWER_CAP_IS_SNB flags is missing a break, so all cores get both
  12 flags set and an assumed base clock of 100 MHz for turbo values.
  13
  14 Reported-by: GSR <gsr.bugs@infernal-iceberg.com>
  15 Tested-by: GSR <gsr.bugs@infernal-iceberg.com>
  16 References: https://bugs.debian.org/859978
  17 Fixes: 8fb2e440b223 (cpupower: Show Intel turbo ratio support via ...)
  18 Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
  19 Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
  20 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  21
  22 ---
  23  tools/power/cpupower/utils/helpers/cpuid.c |    1 +
  24  1 file changed, 1 insertion(+)
  25
  26 --- a/tools/power/cpupower/utils/helpers/cpuid.c
  27 +++ b/tools/power/cpupower/utils/helpers/cpuid.c
  28 @@ -156,6 +156,7 @@ out:
  29                                          */
  30                         case 0x2C:      /* Westmere EP - Gulftown */
  31                                 cpu_info->caps |= CPUPOWER_CAP_HAS_TURBO_RATIO;
  32 +                               break;
  33                         case 0x2A:      /* SNB */
  34                         case 0x2D:      /* SNB Xeon */
  35                         case 0x3A:      /* IVB */