releases/6.8.6/drm-amd-display-fix-nanosec-stat-overflow.patch

   1 From d2b9df484ac4cb1fc5e83707763dc669047919aa Mon Sep 17 00:00:00 2001
   2 From: Sasha Levin <sashal@kernel.org>
   3 Date: Thu, 29 Aug 2019 11:53:52 -0400
   4 Subject: drm/amd/display: Fix nanosec stat overflow
   5
   6 From: Aric Cyr <aric.cyr@amd.com>
   7
   8 [ Upstream commit 14d68acfd04b39f34eea7bea65dda652e6db5bf6 ]
   9
  10 [Why]
  11 Nanosec stats can overflow on long running systems potentially causing
  12 statistic logging issues.
  13
  14 [How]
  15 Use 64bit types for nanosec stats to ensure no overflow.
  16
  17 Reviewed-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
  18 Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
  19 Signed-off-by: Aric Cyr <aric.cyr@amd.com>
  20 Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
  21 Signed-off-by: Sasha Levin <sashal@kernel.org>
  22 ---
  23  drivers/gpu/drm/amd/display/modules/inc/mod_stats.h | 4 ++--
  24  1 file changed, 2 insertions(+), 2 deletions(-)
  25
  26 diff --git a/drivers/gpu/drm/amd/display/modules/inc/mod_stats.h b/drivers/gpu/drm/amd/display/modules/inc/mod_stats.h
  27 index 5960dd760e91c..8ce6c22e5d041 100644
  28 --- a/drivers/gpu/drm/amd/display/modules/inc/mod_stats.h
  29 +++ b/drivers/gpu/drm/amd/display/modules/inc/mod_stats.h
  30 @@ -57,10 +57,10 @@ void mod_stats_update_event(struct mod_stats *mod_stats,
  31                 unsigned int length);
  32
  33  void mod_stats_update_flip(struct mod_stats *mod_stats,
  34 -               unsigned long timestamp_in_ns);
  35 +               unsigned long long timestamp_in_ns);
  36
  37  void mod_stats_update_vupdate(struct mod_stats *mod_stats,
  38 -               unsigned long timestamp_in_ns);
  39 +               unsigned long long timestamp_in_ns);
  40
  41  void mod_stats_update_freesync(struct mod_stats *mod_stats,
  42                 unsigned int v_total_min,
  43 --
  44 2.43.0
  45