linux-kernel - Re: [PATCH 3.10 25/50] gpiolib: of: Correct error handling in of_get_named_gpiod

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Message-ID: <20150125213149.GA3313@roeck-us.net>
Date:	Sun, 25 Jan 2015 13:31:49 -0800
From:	Guenter Roeck <linux@...ck-us.net>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:	linux-kernel@...r.kernel.org, stable@...r.kernel.org,
	Hans Holmberg <hans.holmberg@...el.com>,
	Alexandre Courbot <acourbot@...dia.com>,
	Linus Walleij <linus.walleij@...aro.org>
Subject: Re: [PATCH 3.10 25/50] gpiolib: of: Correct error handling in
 of_get_named_gpiod_flags

On Sun, Jan 25, 2015 at 10:07:15AM -0800, Greg Kroah-Hartman wrote:
> 3.10-stable review patch.  If anyone has any objections, please let me know.
> 
> ------------------
> 
> From: Hans Holmberg <hans.holmberg@...el.com>
> 
> 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@...el.com>
> Reviewed-by: Alexandre Courbot <acourbot@...dia.com>
> Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
> Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> 

This patch is causing several build failures.

Error log:
drivers/gpio/gpiolib-of.c: In function 'of_gpiochip_find_and_xlate':
drivers/gpio/gpiolib-of.c:50:3: error: implicit declaration of function 'ERR_PTR'

since "#include <linux/err.h>" is missing in drivers/gpio/gpiolib-of.c
in the 3.10 kernel.

Guenter
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