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Message-ID: <20240801000834.3930818-103-sashal@kernel.org>
Date: Wed, 31 Jul 2024 20:00:41 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
stable@...r.kernel.org
Cc: Alex Hung <alex.hung@....com>,
Harry Wentland <harry.wentland@....com>,
Jerry Zuo <jerry.zuo@....com>,
Daniel Wheeler <daniel.wheeler@....com>,
Alex Deucher <alexander.deucher@....com>,
Sasha Levin <sashal@...nel.org>,
sunpeng.li@....com,
Rodrigo.Siqueira@....com,
christian.koenig@....com,
Xinhui.Pan@....com,
airlied@...il.com,
daniel@...ll.ch,
hamza.mahfooz@....com,
roman.li@....com,
mario.limonciello@....com,
Wayne.Lin@....com,
amd-gfx@...ts.freedesktop.org,
dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 6.10 103/121] drm/amd/display: Check denominator pbn_div before used
From: Alex Hung <alex.hung@....com>
[ Upstream commit 116a678f3a9abc24f5c9d2525b7393d18d9eb58e ]
[WHAT & HOW]
A denominator cannot be 0, and is checked before used.
This fixes 1 DIVIDE_BY_ZERO issue reported by Coverity.
Reviewed-by: Harry Wentland <harry.wentland@....com>
Signed-off-by: Jerry Zuo <jerry.zuo@....com>
Signed-off-by: Alex Hung <alex.hung@....com>
Tested-by: Daniel Wheeler <daniel.wheeler@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 64fdce551e627..6c9a7089537af 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -7344,7 +7344,7 @@ static int dm_update_mst_vcpi_slots_for_dsc(struct drm_atomic_state *state,
}
}
- if (j == dc_state->stream_count)
+ if (j == dc_state->stream_count || pbn_div == 0)
continue;
slot_num = DIV_ROUND_UP(pbn, pbn_div);
--
2.43.0
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