From: jsg <jsg@openbsd.org>
Date: Thu, 12 Sep 2024 23:36:35 +0000 (+0000)
Subject: drm/amd/display: Check denominator pbn_div before used
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=f759fef40101bc0796e5628c1dce60ae2c8a7e87;p=openbsd

drm/amd/display: Check denominator pbn_div before used

From Alex Hung
dfafee0a7b51c7c9612edd2d991401294964d02f in linux-6.6.y/6.6.51
116a678f3a9abc24f5c9d2525b7393d18d9eb58e in mainline linux
---

diff --git a/sys/dev/pci/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/sys/dev/pci/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 4773734d8e6..9688dc53952 100644
--- a/sys/dev/pci/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/sys/dev/pci/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -6941,7 +6941,7 @@ 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);