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Groups > linux.kernel > #1214745 > unrolled thread

[PATCH] backlight: lp855x: Make sure props struct is zeroed

Started byBjorn Andersson <bjorn.andersson@sonymobile.com>
First post2015-08-27 19:50 +0200
Last post2015-08-28 01:00 +0200
Articles 3 — 3 participants

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  [PATCH] backlight: lp855x: Make sure props struct is zeroed Bjorn Andersson <bjorn.andersson@sonymobile.com> - 2015-08-27 19:50 +0200
    Re: [PATCH] backlight: lp855x: Make sure props struct is zeroed "Kim, Milo" <milo.kim@ti.com> - 2015-08-28 00:50 +0200
      RE: [PATCH] backlight: lp855x: Make sure props struct is zeroed "Johansson, Werner" <Werner.Johansson@sonymobile.com> - 2015-08-28 01:00 +0200

#1214745 — [PATCH] backlight: lp855x: Make sure props struct is zeroed

FromBjorn Andersson <bjorn.andersson@sonymobile.com>
Date2015-08-27 19:50 +0200
Subject[PATCH] backlight: lp855x: Make sure props struct is zeroed
Message-ID<q29tg-330-9@gated-at.bofh.it>
From: Werner Johansson <werner.johansson@sonymobile.com>

The driver occasionally got stuck in suspend mode or other strange
states as those parts of the props struct were never initialized.

Signed-off-by: Werner Johansson <werner.johansson@sonymobile.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@sonymobile.com>
---
 drivers/video/backlight/lp855x_bl.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/video/backlight/lp855x_bl.c b/drivers/video/backlight/lp855x_bl.c
index 88116b493f3b..0a7f88ce1ab0 100644
--- a/drivers/video/backlight/lp855x_bl.c
+++ b/drivers/video/backlight/lp855x_bl.c
@@ -282,6 +282,7 @@ static int lp855x_backlight_register(struct lp855x *lp)
 	struct lp855x_platform_data *pdata = lp->pdata;
 	const char *name = pdata->name ? : DEFAULT_BL_NAME;
 
+	memset(&props, 0, sizeof(props));
 	props.type = BACKLIGHT_PLATFORM;
 	props.max_brightness = MAX_BRIGHTNESS;
 
-- 
1.8.2.2

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#1214976

From"Kim, Milo" <milo.kim@ti.com>
Date2015-08-28 00:50 +0200
Message-ID<q2e9C-1mE-69@gated-at.bofh.it>
In reply to#1214745
On 8/28/2015 2:41 AM, Bjorn Andersson wrote:
> From: Werner Johansson <werner.johansson@sonymobile.com>
>
> The driver occasionally got stuck in suspend mode or other strange
> states as those parts of the props struct were never initialized.

Acked-by: Milo Kim <milo.kim@ti.com>

Thanks for catching this.
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#1214985

From"Johansson, Werner" <Werner.Johansson@sonymobile.com>
Date2015-08-28 01:00 +0200
Message-ID<q2ejf-1y1-15@gated-at.bofh.it>
In reply to#1214976
> > From: Werner Johansson <werner.johansson@sonymobile.com>
> >
> > The driver occasionally got stuck in suspend mode or other strange
> > states as those parts of the props struct were never initialized.
> 
> Acked-by: Milo Kim <milo.kim@ti.com>
> 
> Thanks for catching this.

You're most welcome! These issues can be difficult to track down, the stack is unpredictable.. 

/wj 
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