gpio: sysfs: fix gpio device-attribute leak
authorJohan Hovold <johan@kernel.org>
Tue, 13 Jan 2015 12:00:05 +0000 (13:00 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 30 Jan 2015 01:40:55 +0000 (17:40 -0800)
commita9808403cc6086147f99e3d6f27961fa108f4fe3
tree07e14d814a2b82092e95291044d7bb00b6d057b9
parentaa35a487040862e568968dbcf34aad0827eba588
gpio: sysfs: fix gpio device-attribute leak

commit 0915e6feb38de8d3601819992a5bd050201a56fa upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/gpio/gpiolib.c