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[RESEND,3/4] backlight: lp8788: Fully initialize backlight_properties during probe

Message ID 20240220153532.76613-4-daniel.thompson@linaro.org
State Superseded
Headers show
Series Ensure all backlight drivers zero the properties structure | expand

Commit Message

Daniel Thompson Feb. 20, 2024, 3:35 p.m. UTC 
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: c5a51053cf3b ("backlight: add new lp8788 backlight driver")
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
---
 drivers/video/backlight/lp8788_bl.c | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/drivers/video/backlight/lp8788_bl.c b/drivers/video/backlight/lp8788_bl.c
index d1a14b0db265b..31f97230ee506 100644
--- a/drivers/video/backlight/lp8788_bl.c
+++ b/drivers/video/backlight/lp8788_bl.c
@@ -191,6 +191,7 @@  static int lp8788_backlight_register(struct lp8788_bl *bl)
 	int init_brt;
 	char *name;
 
+	memset(&props, 0, sizeof(struct backlight_properties));
 	props.type = BACKLIGHT_PLATFORM;
 	props.max_brightness = MAX_BRIGHTNESS;