From: jsg <jsg@openbsd.org>
Date: Mon, 27 May 2024 00:51:31 +0000 (+0000)
Subject: drm/amd/display: Fix division by zero in setup_dsc_config
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=a682ea72191ddaaa78a7a85eb6d0ee90a1454d74;p=openbsd

drm/amd/display: Fix division by zero in setup_dsc_config

From Jose Fernandez
7e4f50dfc98c49b3dc6875a35c3112522fb25639 in linux-6.6.y/6.6.32
130afc8a886183a94cf6eab7d24f300014ff87ba in mainline linux
---

diff --git a/sys/dev/pci/drm/amd/display/dc/dsc/dc_dsc.c b/sys/dev/pci/drm/amd/display/dc/dsc/dc_dsc.c
index 3966845c769..230be292ff3 100644
--- a/sys/dev/pci/drm/amd/display/dc/dsc/dc_dsc.c
+++ b/sys/dev/pci/drm/amd/display/dc/dsc/dc_dsc.c
@@ -1033,7 +1033,12 @@ static bool setup_dsc_config(
 	if (!is_dsc_possible)
 		goto done;
 
-	dsc_cfg->num_slices_v = pic_height/slice_height;
+	if (slice_height > 0) {
+		dsc_cfg->num_slices_v = pic_height / slice_height;
+	} else {
+		is_dsc_possible = false;
+		goto done;
+	}
 
 	if (target_bandwidth_kbps > 0) {
 		is_dsc_possible = decide_dsc_target_bpp_x16(