linux-kernel - [PATCH 4.0 096/148] gpio: gpio-kempld: Fix get

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Message-Id: <20150603114209.547536215@linuxfoundation.org>
Date:	Wed,  3 Jun 2015 21:09:26 +0900
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org,
	Jochen Henneberg <jh@...neberg-systemdesign.com>,
	Michael Brunner <michael.brunner@...tron.com>,
	Guenter Roeck <linux@...ck-us.net>,
	Linus Walleij <linus.walleij@...aro.org>
Subject: [PATCH 4.0 096/148] gpio: gpio-kempld: Fix get_direction return value

4.0-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Michael Brunner <mibru@....de>

commit f230e8ffc03f17bd9d6b90ea890b8252a8cc1821 upstream.

This patch fixes an inverted return value of the gpio get_direction
function.

The wrong value causes the direction sysfs entry and GPIO debugfs file
to indicate incorrect GPIO direction settings. In some cases it also
prevents setting GPIO output values.

The problem is also present in all other stable kernel versions since
linux-3.12.

Reported-by: Jochen Henneberg <jh@...neberg-systemdesign.com>
Signed-off-by: Michael Brunner <michael.brunner@...tron.com>
Reviewed-by: Guenter Roeck <linux@...ck-us.net>
Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpio/gpio-kempld.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpio/gpio-kempld.c
+++ b/drivers/gpio/gpio-kempld.c
@@ -117,7 +117,7 @@ static int kempld_gpio_get_direction(str
 		= container_of(chip, struct kempld_gpio_data, chip);
 	struct kempld_device_data *pld = gpio->pld;
 
-	return kempld_gpio_get_bit(pld, KEMPLD_GPIO_DIR_NUM(offset), offset);
+	return !kempld_gpio_get_bit(pld, KEMPLD_GPIO_DIR_NUM(offset), offset);
 }
 
 static int kempld_gpio_pincount(struct kempld_device_data *pld)


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