linux-kernel - [PATCH AUTOSEL 6.10 075/121] drm/amd/display: Correct the defined value for AMDGPU_DMUB_NOTIFICATION

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Message-ID: <20240801000834.3930818-75-sashal@kernel.org>
Date: Wed, 31 Jul 2024 20:00:13 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Wayne Lin <wayne.lin@....com>,
	Jerry Zuo <jerry.zuo@....com>,
	Zaeem Mohamed <zaeem.mohamed@....com>,
	Daniel Wheeler <daniel.wheeler@....com>,
	Alex Deucher <alexander.deucher@....com>,
	Sasha Levin <sashal@...nel.org>,
	harry.wentland@....com,
	sunpeng.li@....com,
	Rodrigo.Siqueira@....com,
	christian.koenig@....com,
	Xinhui.Pan@....com,
	airlied@...il.com,
	daniel@...ll.ch,
	alex.hung@....com,
	mwen@...lia.com,
	joshua@...ggi.es,
	Roman.Li@....com,
	mario.limonciello@....com,
	Bhawanpreet.Lakha@....com,
	rdunlap@...radead.org,
	amd-gfx@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 6.10 075/121] drm/amd/display: Correct the defined value for AMDGPU_DMUB_NOTIFICATION_MAX

From: Wayne Lin <wayne.lin@....com>

[ Upstream commit ad28d7c3d989fc5689581664653879d664da76f0 ]

[Why & How]
It actually exposes '6' types in enum dmub_notification_type. Not 5. Using smaller
number to create array dmub_callback & dmub_thread_offload has potential to access
item out of array bound. Fix it.

Reviewed-by: Jerry Zuo <jerry.zuo@....com>
Acked-by: Zaeem Mohamed <zaeem.mohamed@....com>
Signed-off-by: Wayne Lin <wayne.lin@....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/amdgpu_dm/amdgpu_dm.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
index 09519b7abf67b..5c9d32dff8538 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h
@@ -50,7 +50,7 @@
 
 #define AMDGPU_DM_MAX_NUM_EDP 2
 
-#define AMDGPU_DMUB_NOTIFICATION_MAX 5
+#define AMDGPU_DMUB_NOTIFICATION_MAX 6
 
 #define HDMI_AMD_VENDOR_SPECIFIC_DATA_BLOCK_IEEE_REGISTRATION_ID 0x00001A
 #define AMD_VSDB_VERSION_3_FEATURECAP_REPLAYMODE 0x40
-- 
2.43.0