From fc8b916572318350c6238b1b0c857e540eba59fb Mon Sep 17 00:00:00 2001
From: Wenjing Liu <wenjing.liu@amd.com>
Date: Tue, 13 Sep 2022 19:04:56 -0400
Subject: drm/amd/display: add missing null check
Git-commit: 567df29f51a582ced8d2f56c7f531757496fe7f4
Patch-mainline: v6.1-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225 jsc#PED-2849

[why]
There is a coding error for a missing null check for stream pointer when iterating through
pipe_ctx.

Reviewed-by: Martin Leung <Martin.Leung@amd.com>
Acked-by: Jasdeep Dhillon <jdhillon@amd.com>
Signed-off-by: Wenjing Liu <wenjing.liu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c
index 7544ac8e33ac..ba45b222d387 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c
@@ -1303,7 +1303,7 @@ static void apply_symclk_on_tx_off_wa(struct dc_link *link)
 	if (link->phy_state.symclk_ref_cnts.otg > 0) {
 		for (i = 0; i < MAX_PIPES; i++) {
 			pipe_ctx = &dc->current_state->res_ctx.pipe_ctx[i];
-			if (pipe_ctx->stream->link == link && pipe_ctx->top_pipe == NULL) {
+			if (pipe_ctx->stream && pipe_ctx->stream->link == link && pipe_ctx->top_pipe == NULL) {
 				pipe_ctx->clock_source->funcs->program_pix_clk(
 						pipe_ctx->clock_source,
 						&pipe_ctx->stream_res.pix_clk_params,
-- 
2.38.1