6.1-stable review patch. If anyone has any objections, please let me know.
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From: Alex Hung alex.hung@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.wentland@amd.com Signed-off-by: Jerry Zuo jerry.zuo@amd.com Signed-off-by: Alex Hung alex.hung@amd.com Tested-by: Daniel Wheeler daniel.wheeler@amd.com Signed-off-by: Alex Deucher alexander.deucher@amd.com Signed-off-by: Sasha Levin sashal@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 0be1a1149a3f..393e32259a77 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -6767,7 +6767,7 @@ 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);