Thread (9 messages) 9 messages, 3 authors, 2024-02-29

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

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STALE955d LANDED

From: Daniel Thompson <hidden>
Date: 2024-02-20 15:35:45
Also in: dri-devel, lkml
Subsystem: backlight class/subsystem, framebuffer layer, the rest · Maintainers: Lee Jones, Daniel Thompson, Jingoo Han, Helge Deller, Linus Torvalds

Revision resend of 2 in this series; landed in mainline as 392346827fbe on 2024-03-07.

Revisions (2)
  1. v1 [diff vs current]
  2. resend current
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 <redacted>
---
 drivers/video/backlight/lp8788_bl.c | 1 +
 1 file changed, 1 insertion(+)
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;
 
-- 
2.43.0
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