linux-kernel - [PATCH 2/9] backlight: atmel-pwm-bl: fix gpio polarity in remove

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 23 Oct 2013 11:55:36 +0200
From:	Johan Hovold <jhovold@...il.com>
To:	Richard Purdie <rpurdie@...ys.net>,
	Jingoo Han <jg1.han@...sung.com>
Cc:	Nicolas Ferre <nicolas.ferre@...el.com>,
	Tomi Valkeinen <tomi.valkeinen@...com>,
	Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-fbdev@...r.kernel.org, linux-kernel@...r.kernel.org,
	Johan Hovold <jhovold@...il.com>, stable@...r.kernel.org
Subject: [PATCH 2/9] backlight: atmel-pwm-bl: fix gpio polarity in remove

Make sure to honour gpio polarity also at remove so that the backlight
is actually disabled on boards with active-low enable pin.

Cc: stable@...r.kernel.org
Acked-by: Jingoo Han <jg1.han@...sung.com>
Signed-off-by: Johan Hovold <jhovold@...il.com>
---
 drivers/video/backlight/atmel-pwm-bl.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/video/backlight/atmel-pwm-bl.c b/drivers/video/backlight/atmel-pwm-bl.c
index 8aac273..3cb0094 100644
--- a/drivers/video/backlight/atmel-pwm-bl.c
+++ b/drivers/video/backlight/atmel-pwm-bl.c
@@ -205,8 +205,10 @@ static int atmel_pwm_bl_remove(struct platform_device *pdev)
 {
 	struct atmel_pwm_bl *pwmbl = platform_get_drvdata(pdev);
 
-	if (pwmbl->gpio_on != -1)
-		gpio_set_value(pwmbl->gpio_on, 0);
+	if (pwmbl->gpio_on != -1) {
+		gpio_set_value(pwmbl->gpio_on,
+					0 ^ pwmbl->pdata->on_active_low);
+	}
 	pwm_channel_disable(&pwmbl->pwmc);
 	pwm_channel_free(&pwmbl->pwmc);
 
-- 
1.8.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/