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path: root/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mpc.c
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Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mpc.c')
-rw-r--r--drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mpc.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mpc.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mpc.c
index 769974375b4b..8e9384094f6d 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mpc.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mpc.c
@@ -131,6 +131,12 @@ struct mpcc *mpc1_get_mpcc_for_dpp(struct mpc_tree *tree, int dpp_id)
while (tmp_mpcc != NULL) {
if (tmp_mpcc->dpp_id == dpp_id)
return tmp_mpcc;
+
+ /* avoid circular linked list */
+ ASSERT(tmp_mpcc != tmp_mpcc->mpcc_bot);
+ if (tmp_mpcc == tmp_mpcc->mpcc_bot)
+ break;
+
tmp_mpcc = tmp_mpcc->mpcc_bot;
}
return NULL;