linux-kernel - [PATCH 5.14 067/172] drm/amd/display: initialize backlight_ramping

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Message-Id: <20211004125047.154908306@linuxfoundation.org>
Date:   Mon,  4 Oct 2021 14:51:57 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Roman Li <Roman.Li@....com>,
        Anson Jacob <Anson.Jacob@....com>,
        Josip Pavic <Josip.Pavic@....com>,
        Daniel Wheeler <daniel.wheeler@....com>,
        Alex Deucher <alexander.deucher@....com>
Subject: [PATCH 5.14 067/172] drm/amd/display: initialize backlight_ramping_override to false

From: Josip Pavic <Josip.Pavic@....com>

commit 467a51b69d0828887fb1b6719159a6b16da688f8 upstream.

[Why]
Stack variable params.backlight_ramping_override is uninitialized, so it
contains junk data

[How]
Initialize the variable to false

Reviewed-by: Roman Li <Roman.Li@....com>
Acked-by: Anson Jacob <Anson.Jacob@....com>
Signed-off-by: Josip Pavic <Josip.Pavic@....com>
Tested-by: Daniel Wheeler <daniel.wheeler@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Cc: stable@...r.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -1724,6 +1724,7 @@ static int dm_late_init(void *handle)
 		linear_lut[i] = 0xFFFF * i / 15;
 
 	params.set = 0;
+	params.backlight_ramping_override = false;
 	params.backlight_ramping_start = 0xCCCC;
 	params.backlight_ramping_reduction = 0xCCCCCCCC;
 	params.backlight_lut_array_size = 16;