From: Alexandre Courbot <acourbot@nvidia.com>
Date: Fri, 4 Oct 2013 17:59:58 +0000 (-0700)
Subject: gpiolib: let gpiod_request() return -EPROBE_DEFER
X-Git-Tag: v3.12-rc6~14^2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0204df470d6db830f0f2f5654ec582be84d81588;p=pandora-kernel.git

gpiolib: let gpiod_request() return -EPROBE_DEFER

Patch be1a4b brought some improvements to the GPIO error handling code,
but also changed the return value of gpiod_request() when called on a
not yet initialized GPIO descriptor: it now returns -EINVAL instead of
-EPROBE_DEFER, and this affects some drivers.

This patch restores the original behavior for gpiod_request(). It is
safe to do so now that desc_to_gpio() does not rely on the GPIO
descriptor to be initialized. Other functions changed by patch be1a4b
do not see their return value affected, so these are not reverted.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Reported-by: Dr. H. Nikolaus Schaller <hns@goldelico.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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