Patch "gpiolib: of: Correct error handling in of_get_named_gpiod_flags" has been added to the 3.10-stable tree

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This is a note to let you know that I've just added the patch titled

    gpiolib: of: Correct error handling in of_get_named_gpiod_flags

to the 3.10-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     gpiolib-of-correct-error-handling-in-of_get_named_gpiod_flags.patch
and it can be found in the queue-3.10 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From 7b8792bbdffdff3abda704f89c6a45ea97afdc62 Mon Sep 17 00:00:00 2001
From: Hans Holmberg <hans.holmberg@xxxxxxxxx>
Date: Fri, 9 Jan 2015 09:40:43 +0100
Subject: gpiolib: of: Correct error handling in of_get_named_gpiod_flags

From: Hans Holmberg <hans.holmberg@xxxxxxxxx>

commit 7b8792bbdffdff3abda704f89c6a45ea97afdc62 upstream.

of_get_named_gpiod_flags fails with -EPROBE_DEFER in cases
where the gpio chip is available and the GPIO translation fails.

This causes drivers to be re-probed erroneusly, and hides the
real problem(i.e. the GPIO number being out of range).

Signed-off-by: Hans Holmberg <hans.holmberg@xxxxxxxxx>
Reviewed-by: Alexandre Courbot <acourbot@xxxxxxxxxx>
Signed-off-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 drivers/gpio/gpiolib-of.c |   10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

--- a/drivers/gpio/gpiolib-of.c
+++ b/drivers/gpio/gpiolib-of.c
@@ -42,8 +42,14 @@ static int of_gpiochip_find_and_xlate(st
 		return false;
 
 	ret = gc->of_xlate(gc, &gg_data->gpiospec, gg_data->flags);
-	if (ret < 0)
-		return false;
+	if (ret < 0) {
+		/* We've found the gpio chip, but the translation failed.
+		 * Return true to stop looking and return the translation
+		 * error via out_gpio
+		 */
+		gg_data->out_gpio = ERR_PTR(ret);
+		return true;
+	 }
 
 	gg_data->out_gpio = ret + gc->base;
 	return true;


Patches currently in stable-queue which might be from hans.holmberg@xxxxxxxxx are

queue-3.10/gpiolib-of-correct-error-handling-in-of_get_named_gpiod_flags.patch
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