[ 3.5.y.z extended stable ] Patch "gpiolib: Don't return -EPROBE_DEFER to sysfs, or for invalid" has been added to staging queue

[Herton Ronaldo Krzesinski]

This is a note to let you know that I have just added a patch titled

    gpiolib: Don't return -EPROBE_DEFER to sysfs, or for invalid

to the linux-3.5.y-queue branch of the 3.5.y.z extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.5.y.z tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Herton

------

>From cc67df3009f4c273092c1e5c1d9ebc04eac6cffb Mon Sep 17 00:00:00 2001
From: Mathias Nyman <mathias.nyman at linux.intel.com>
Date: Thu, 25 Oct 2012 14:03:03 +0300
Subject: [PATCH] gpiolib: Don't return -EPROBE_DEFER to sysfs, or for invalid
 gpios
X-Extended-Stable: 3.5

commit ad2fab36d7922401c4576fb7ea9b21a47a29a17f upstream.

gpios requested with invalid numbers, or gpios requested from userspace via sysfs
should not try to be deferred on failure.

Signed-off-by: Mathias Nyman <mathias.nyman at linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij at linaro.org>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski at canonical.com>
---
 drivers/gpio/gpiolib.c |   10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 120b2a0..bd76017 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -623,9 +623,11 @@ static ssize_t export_store(struct class *class,
 	 */

 	status = gpio_request(gpio, "sysfs");
-	if (status < 0)
+	if (status < 0) {
+		if (status == -EPROBE_DEFER)
+			status = -ENODEV;
 		goto done;
-
+	}
 	status = gpio_export(gpio, true);
 	if (status < 0)
 		gpio_free(gpio);
@@ -1191,8 +1193,10 @@ int gpio_request(unsigned gpio, const char *label)

 	spin_lock_irqsave(&gpio_lock, flags);

-	if (!gpio_is_valid(gpio))
+	if (!gpio_is_valid(gpio)) {
+		status = -EINVAL;
 		goto done;
+	}
 	desc = &gpio_desc[gpio];
 	chip = desc->chip;
 	if (chip == NULL)
--
1.7.9.5