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From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org,
	stable@vger.kernel.org
Cc: Aric Cyr <aric.cyr@amd.com>,
	Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>,
	Daniel Wheeler <daniel.wheeler@amd.com>,
	Alex Deucher <alexander.deucher@amd.com>,
	Sasha Levin <sashal@kernel.org>,
	harry.wentland@amd.com,
	sunpeng.li@amd.com,
	christian.koenig@amd.com,
	Xinhui.Pan@amd.com,
	airlied@gmail.com,
	daniel@ffwll.ch,
	aurabindo.pillai@amd.com,
	dillon.varone@amd.com,
	amd-gfx@lists.freedesktop.org,
	dri-devel@lists.freedesktop.org
Subject: [PATCH AUTOSEL 6.6 38/75] drm/amd/display: Fix nanosec stat overflow
Date: Fri, 29 Mar 2024 08:42:19 -0400
Message-ID: <20240329124330.3089520-38-sashal@kernel.org>
In-Reply-To: <20240329124330.3089520-1-sashal@kernel.org>
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From: Aric Cyr <aric.cyr@amd.com>

[ Upstream commit 14d68acfd04b39f34eea7bea65dda652e6db5bf6 ]

[Why]
Nanosec stats can overflow on long running systems potentially causing
statistic logging issues.

[How]
Use 64bit types for nanosec stats to ensure no overflow.

Reviewed-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Aric Cyr <aric.cyr@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/gpu/drm/amd/display/modules/inc/mod_stats.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/modules/inc/mod_stats.h b/drivers/gpu/drm/amd/display/modules/inc/mod_stats.h
index 4220fd8fdd60c..54cd86060f4d6 100644
--- a/drivers/gpu/drm/amd/display/modules/inc/mod_stats.h
+++ b/drivers/gpu/drm/amd/display/modules/inc/mod_stats.h
@@ -57,10 +57,10 @@ void mod_stats_update_event(struct mod_stats *mod_stats,
 		unsigned int length);
 
 void mod_stats_update_flip(struct mod_stats *mod_stats,
-		unsigned long timestamp_in_ns);
+		unsigned long long timestamp_in_ns);
 
 void mod_stats_update_vupdate(struct mod_stats *mod_stats,
-		unsigned long timestamp_in_ns);
+		unsigned long long timestamp_in_ns);
 
 void mod_stats_update_freesync(struct mod_stats *mod_stats,
 		unsigned int v_total_min,
-- 
2.43.0