[PATCH AUTOSEL 6.1 50/61] drm/amd/display: Check denominator pbn_div before used

[Sasha Levin]

From: Alex Hung <alex.h...@amd.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.wentl...@amd.com>
Signed-off-by: Jerry Zuo <jerry....@amd.com>
Signed-off-by: Alex Hung <alex.h...@amd.com>
Tested-by: Daniel Wheeler <daniel.whee...@amd.com>
Signed-off-by: Alex Deucher <alexander.deuc...@amd.com>
Signed-off-by: Sasha Levin <sas...@kernel.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 2c6caddf1de34..b7d2fa77d828b 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -6765,7 +6765,7 @@ 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