From: Johan Hovold <johan@kernel.org>
Date: Tue, 13 Jan 2015 12:00:05 +0000 (+0100)
Subject: gpio: sysfs: fix gpio device-attribute leak
X-Git-Tag: omap-for-v4.1/prcm-dts-mfd-syscon-fix~257^2~2
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=0915e6feb38de8d3601819992a5bd050201a56fa;p=pandora-kernel.git

gpio: sysfs: fix gpio device-attribute leak

The gpio device attributes were never destroyed when the gpio was
unexported (or on export failures).

Use device_create_with_groups() to create the default device attributes
of the gpio class device. Note that this also fixes the
attribute-creation race with userspace for these attributes.

Remove contingent attributes in export error path and on unexport.

Fixes: d8f388d8dc8d ("gpio: sysfs interface")
Cc: stable <stable@vger.kernel.org>	# v2.6.27+
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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