From 6a99ad4a2e1b1693ffe8e40cc0dddfc633ce2a50 Mon Sep 17 00:00:00 2001
From: Jon Povey <jon.povey@racelogic.co.uk>
Date: Tue, 27 Jul 2010 13:18:06 -0700
Subject: [PATCH] gpio: fix spurious printk when freeing a gpio
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>
Acked-by: Uwe Kleine-K?nig <u.kleine-koenig@pengutronix.de>
Cc: Gregory Bean <gbean@codeaurora.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
drivers/gpio/gpiolib.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 3ca36542e338..4e51fe3c1fc4 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -893,10 +893,12 @@ EXPORT_SYMBOL_GPL(gpio_sysfs_set_active_low);
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;
}
--
GitLab