From: Michael Strauss <michael.strauss@amd.com>
Date: Mon, 16 Aug 2021 20:15:36 +0000 (-0400)
Subject: drm/amd/display: Initialize lt_settings on instantiation
X-Git-Tag: v6.6.17~6802^2~8^2~90
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b278b738c3be4f383796d09ef8fb6e49fee2091f;p=platform%2Fkernel%2Flinux-rpi.git

drm/amd/display: Initialize lt_settings on instantiation

[WHY]
lt_settings' pointers remain uninitialized but nonzero if display fails
to light up with no DPCD/EDID info populated, leading to a hang on access

Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Alan Liu <HaoPing.Liu@amd.com>
Signed-off-by: Michael Strauss <michael.strauss@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dpia.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dpia.c
index 3b8acda50701..468e39589ed8 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dpia.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dpia.c
@@ -960,7 +960,7 @@ enum link_training_result dc_link_dpia_perform_link_training(
 	bool skip_video_pattern)
 {
 	enum link_training_result result;
-	struct link_training_settings lt_settings;
+	struct link_training_settings lt_settings = {0};
 	uint8_t repeater_cnt = 0; /* Number of hops/repeaters in display path. */
 	int8_t repeater_id; /* Current hop. */