From: jsg <jsg@openbsd.org>
Date: Tue, 19 Sep 2023 12:54:40 +0000 (+0000)
Subject: drm/amd/display: Fix a bug when searching for insert_above_mpcc
X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=f052e0f682b7d4eb02abdb624d8a53afc3453374;p=openbsd

drm/amd/display: Fix a bug when searching for insert_above_mpcc

From Wesley Chalmers
77b49370a261c9c79587d4a83960d5db39ee6cfa in linux-6.1.y/6.1.54
3d028d5d60d516c536de1ddd3ebf3d55f3f8983b in mainline linux
---

diff --git a/sys/dev/pci/drm/amd/display/dc/dcn10/dcn10_mpc.c b/sys/dev/pci/drm/amd/display/dc/dcn10/dcn10_mpc.c
index 8e9384094f6..f2f55565e98 100644
--- a/sys/dev/pci/drm/amd/display/dc/dcn10/dcn10_mpc.c
+++ b/sys/dev/pci/drm/amd/display/dc/dcn10/dcn10_mpc.c
@@ -212,8 +212,9 @@ struct mpcc *mpc1_insert_plane(
 		/* check insert_above_mpcc exist in tree->opp_list */
 		struct mpcc *temp_mpcc = tree->opp_list;
 
-		while (temp_mpcc && temp_mpcc->mpcc_bot != insert_above_mpcc)
-			temp_mpcc = temp_mpcc->mpcc_bot;
+		if (temp_mpcc != insert_above_mpcc)
+			while (temp_mpcc && temp_mpcc->mpcc_bot != insert_above_mpcc)
+				temp_mpcc = temp_mpcc->mpcc_bot;
 		if (temp_mpcc == NULL)
 			return NULL;
 	}