linux-kernel - [PATCH v2] drm/amd/display: Add otg_master NULL check within init_pipe_slice_table_from

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Message-Id: <20240709091012.3123409-1-make24@iscas.ac.cn>
Date: Tue,  9 Jul 2024 17:10:12 +0800
From: Ma Ke <make24@...as.ac.cn>
To: harry.wentland@....com,
	sunpeng.li@....com,
	Rodrigo.Siqueira@....com,
	alexander.deucher@....com,
	christian.koenig@....com,
	Xinhui.Pan@....com,
	airlied@...il.com,
	daniel@...ll.ch,
	daniel.vetter@...ll.ch,
	alvin.lee2@....com,
	wenjing.liu@....com,
	chaitanya.dhere@....com,
	hamza.mahfooz@....com,
	sohaib.nadeem@....com,
	samson.tam@....com,
	Qingqing.Zhuo@....com,
	dillon.varone@....com,
	stylon.wang@....com,
	akpm@...ux-foundation.org
Cc: amd-gfx@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	Ma Ke <make24@...as.ac.cn>,
	stable@...r.kernel.org
Subject: [PATCH v2] drm/amd/display: Add otg_master NULL check within init_pipe_slice_table_from_context

To avoid reports of NULL_RETURN warning, we should add
otg_master NULL check.

Cc: stable@...r.kernel.org
Fixes: c51d87202d1f ("drm/amd/display: do not attempt ODM power optimization if minimal transition doesn't exist")
Signed-off-by: Ma Ke <make24@...as.ac.cn>
---
Changes in v2:
- added the recipient's email address, due to the prolonged absence of a 
response from the recipient.
- added Cc stable.
---
 drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c b/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c
index f6fe0a64beac..8972598ca77f 100644
--- a/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c
+++ b/drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c
@@ -1177,6 +1177,9 @@ static void init_pipe_slice_table_from_context(
 		stream = context->streams[i];
 		otg_master = resource_get_otg_master_for_stream(
 				&context->res_ctx, stream);
+		if (!otg_master)
+			continue;
+
 		count = resource_get_odm_slice_count(otg_master);
 		update_slice_table_for_stream(table, stream, count);
 
-- 
2.25.1