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From: Daniel Thompson <daniel.thompson@linaro.org>
To: Lee Jones <lee.jones@linaro.org>,
	Jingoo Han <jingoohan1@gmail.com>
Cc: Daniel Thompson <daniel.thompson@linaro.org>,
	Luca Weiss <luca@z3ntu.xyz>,
	dri-devel@lists.freedesktop.org,
	linux-fbdev@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH 2/4] backlight: lm3639: Fully initialize backlight_properties during probe
Date: Tue, 20 Feb 2024 15:30:06 +0000
Message-ID: <20240220153010.76238-3-daniel.thompson@linaro.org>
In-Reply-To: <20240220153010.76238-1-daniel.thompson@linaro.org>
References: <20240220153010.76238-1-daniel.thompson@linaro.org>
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props is stack allocated and the fields that are not explcitly set
by the probe function need to be zeroed or we'll get undefined behaviour
(especially so power/blank states)!

Fixes: 0f59858d5119 ("backlight: add new lm3639 backlight driver")
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
---
 drivers/video/backlight/lm3639_bl.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/video/backlight/lm3639_bl.c b/drivers/video/backlight/lm3639_bl.c
index 5246c171497d6..564f62acd7211 100644
--- a/drivers/video/backlight/lm3639_bl.c
+++ b/drivers/video/backlight/lm3639_bl.c
@@ -338,6 +338,7 @@ static int lm3639_probe(struct i2c_client *client)
 	}
 
 	/* backlight */
+	memset(&props, 0, sizeof(struct backlight_properties));
 	props.type = BACKLIGHT_RAW;
 	props.brightness = pdata->init_brt_led;
 	props.max_brightness = pdata->max_brt_led;
-- 
2.43.0