From: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Date: Thu, 13 Feb 2014 22:05:28 +0000 (+0100)
Subject: w1-gpio: handle of_get_gpio() returning -EPROBE_DEFER better
X-Git-Tag: v3.15-rc1~141^2~66
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0b336cea56ccd9949dc9bd6f24bd3bb9d212ffad;p=pandora-kernel.git

w1-gpio: handle of_get_gpio() returning -EPROBE_DEFER better

of_get_gpio() might return -EPROBE_DEFER meaning that the driver
providing the gpio isn't ready yet. If that happens for the first gpio
the resulting kernel output without this patch is:

	w1-gpio somename: Failed to parse DT
	platform somename: Driver w1-gpio requests probe deferral

The first message is misleading and so is suppressed with this patch.

Further if determining the gpio to switch the external pullup yields
-EPROBE_DEFER this error should be passed back to the caller instead of
just continuing without pullup.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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