+ gpio-fix-spurious-printk-when-freeing-a-gpio.patch added to -mm tree

[akpm@linux-foundation.org]

The patch titled
     gpio: fix spurious printk when freeing a gpio
has been added to the -mm tree.  Its filename is
     gpio-fix-spurious-printk-when-freeing-a-gpio.patch

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See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find
out what to do about this

The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/

------------------------------------------------------
Subject: gpio: fix spurious printk when freeing a gpio
From: Jon Povey <jon.povey@racelogic.co.uk>

When freeing a gpio that has not been exported, gpio_unexport() prints a
debug message when it should just fall through silently.

Example spurious message:

	gpio_unexport: gpio0 status -22

Signed-off-by: Jon Povey <jon.povey@racelogic.co.uk>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/gpio/gpiolib.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff -puN drivers/gpio/gpiolib.c~gpio-fix-spurious-printk-when-freeing-a-gpio drivers/gpio/gpiolib.c
--- a/drivers/gpio/gpiolib.c~gpio-fix-spurious-printk-when-freeing-a-gpio
+++ a/drivers/gpio/gpiolib.c
@@ -893,10 +893,12 @@ EXPORT_SYMBOL_GPL(gpio_sysfs_set_active_
 void gpio_unexport(unsigned gpio)
 {
 	struct gpio_desc	*desc;
-	int			status = -EINVAL;
+	int			status = 0;
 
-	if (!gpio_is_valid(gpio))
+	if (!gpio_is_valid(gpio)) {
+		status = -EINVAL;
 		goto done;
+	}
 
 	mutex_lock(&sysfs_lock);
 
@@ -911,7 +913,6 @@ void gpio_unexport(unsigned gpio)
 			clear_bit(FLAG_EXPORT, &desc->flags);
 			put_device(dev);
 			device_unregister(dev);
-			status = 0;
 		} else
 			status = -ENODEV;
 	}
_

Patches currently in -mm which might be from jon.povey@racelogic.co.uk are

gpio-fix-spurious-printk-when-freeing-a-gpio.patch