linux-kernel - [PATCH AUTOSEL 6.10 023/121] drm/amd/display: Add otg_master NULL check within resource_log_pipe_topology

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Message-ID: <20240801000834.3930818-23-sashal@kernel.org>
Date: Wed, 31 Jul 2024 19:59:21 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Hersen Wu <hersenxs.wu@....com>,
	Harry Wentland <harry.wentland@....com>,
	Tom Chung <chiahsuan.chung@....com>,
	Daniel Wheeler <daniel.wheeler@....com>,
	Alex Deucher <alexander.deucher@....com>,
	Sasha Levin <sashal@...nel.org>,
	sunpeng.li@....com,
	Rodrigo.Siqueira@....com,
	christian.koenig@....com,
	Xinhui.Pan@....com,
	airlied@...il.com,
	daniel@...ll.ch,
	wenjing.liu@....com,
	jun.lei@....com,
	alex.hung@....com,
	hamza.mahfooz@....com,
	alvin.lee2@....com,
	george.shen@....com,
	dillon.varone@....com,
	amd-gfx@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 6.10 023/121] drm/amd/display: Add otg_master NULL check within resource_log_pipe_topology_update

From: Hersen Wu <hersenxs.wu@....com>

[ Upstream commit 871cd9d881fa791d3f82885000713de07041c0ae ]

[Why]
Coverity reports NULL_RETURN warning.

[How]
Add otg_master NULL check.

Reviewed-by: Harry Wentland <harry.wentland@....com>
Acked-by: Tom Chung <chiahsuan.chung@....com>
Signed-off-by: Hersen Wu <hersenxs.wu@....com>
Tested-by: Daniel Wheeler <daniel.wheeler@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/amd/display/dc/core/dc_resource.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
index 693d05a98c6fb..76a8e90da0d56 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
@@ -2279,6 +2279,9 @@ void resource_log_pipe_topology_update(struct dc *dc, struct dc_state *state)
 					state->stream_status[stream_idx].mall_stream_config.paired_stream);
 			otg_master = resource_get_otg_master_for_stream(
 					&state->res_ctx, state->streams[phantom_stream_idx]);
+			if (!otg_master)
+				continue;
+
 			resource_log_pipe_for_stream(dc, state, otg_master, stream_idx);
 		}
 	}
-- 
2.43.0