tree 27ae47155f3191b532a6dff8f54ea4bc492bd5f1
parent ae3fd2f96322e1d0d570c2fb1495703d13434f8c
author Johan Hovold <johan@kernel.org> 1421150405 +0100
committer chrmhoffmann <chrmhoffmann@gmail.com> 1586074868 +0200

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")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
[lizf: Backported to 3.4:
 - adjust filename
 - adjust context]
Signed-off-by: Zefan Li <lizefan@huawei.com>