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iio: sw-device: Fix config group initialization

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Use the IS_ENABLED() helper macro to ensure that the configfs group is
initialized either when configfs is built-in or when configfs is built as a
module. Otherwise software device creation will result in undefined
behaviour when configfs is built as a module since the configfs group for
the device not properly initialized.

Similar to commit b2f0c09664 ("iio: sw-trigger: Fix config group
initialization").

Fixes: 0f3a8c3f34 ("iio: Add support for creating IIO devices via configfs")
Reported-by: Miguel Robles <miguel.robles@farole.net>
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Daniel Baluta <daniel.baluta@gmail.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Lars-Peter Clausen 2017-03-09 17:20:04 +01:00 committed by Jonathan Cameron
parent 3ff861f59f
commit c42f821861
1 changed files with 1 additions and 1 deletions
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2
include/linux/iio/sw_device.h
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@ -62,7 +62,7 @@ void iio_swd_group_init_type_name(struct iio_sw_device *d,
const char *name,
struct config_item_type *type)
{
#ifdef CONFIG_CONFIGFS_FS
#if IS_ENABLED(CONFIG_CONFIGFS_FS)
config_group_init_type_name(&d->group, name, type);
#endif
}