linux-kernel - [PATCH AUTOSEL 5.15 04/47] drm/amd/pm: fix warning using uninitialized value of max_vid

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Message-ID: <20240801003256.3937416-4-sashal@kernel.org>
Date: Wed, 31 Jul 2024 20:30:54 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Jesse Zhang <jesse.zhang@....com>,
	Jesse Zhang <Jesse.Zhang@....com>,
	Tim Huang <Tim.Huang@....com>,
	Alex Deucher <alexander.deucher@....com>,
	Sasha Levin <sashal@...nel.org>,
	kenneth.feng@....com,
	christian.koenig@....com,
	Xinhui.Pan@....com,
	airlied@...il.com,
	daniel@...ll.ch,
	Jun.Ma2@....com,
	kevinyang.wang@....com,
	ruanjinjie@...wei.com,
	mario.limonciello@....com,
	bob.zhou@....com,
	amd-gfx@...ts.freedesktop.org,
	dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 5.15 04/47] drm/amd/pm: fix warning using uninitialized value of max_vid_step

From: Jesse Zhang <jesse.zhang@....com>

[ Upstream commit 17e3bea65cdc453695b2fe4ff26d25d17f5339e9 ]

Check the return of pp_atomfwctrl_get_Voltage_table_v4
as it may fail to initialize max_vid_step
V2: change the check condition (Tim Huang)

Signed-off-by: Jesse Zhang <Jesse.Zhang@....com>
Reviewed-by: Tim Huang <Tim.Huang@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega10_hwmgr.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega10_hwmgr.c b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega10_hwmgr.c
index e6336654c5655..259bf8e702ce2 100644
--- a/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega10_hwmgr.c
+++ b/drivers/gpu/drm/amd/pm/powerplay/hwmgr/vega10_hwmgr.c
@@ -2575,8 +2575,11 @@ static int vega10_init_smc_table(struct pp_hwmgr *hwmgr)
 		}
 	}
 
-	pp_atomfwctrl_get_voltage_table_v4(hwmgr, VOLTAGE_TYPE_VDDC,
+	result = pp_atomfwctrl_get_voltage_table_v4(hwmgr, VOLTAGE_TYPE_VDDC,
 			VOLTAGE_OBJ_SVID2,  &voltage_table);
+	PP_ASSERT_WITH_CODE(!result,
+			"Failed to get voltage table!",
+			return result);
 	pp_table->MaxVidStep = voltage_table.max_vid_step;
 
 	pp_table->GfxDpmVoltageMode =
-- 
2.43.0