4.9-stable review patch. If anyone has any objections, please let me know.
------------------ From: Lars-Peter Clausen <[email protected]> commit c42f8218610aa09d7d3795e5810387673c1f84b6 upstream. 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 b2f0c09664b7 ("iio: sw-trigger: Fix config group initialization"). Fixes: 0f3a8c3f34f7 ("iio: Add support for creating IIO devices via configfs") Reported-by: Miguel Robles <[email protected]> Signed-off-by: Lars-Peter Clausen <[email protected]> Acked-by: Daniel Baluta <[email protected]> Signed-off-by: Jonathan Cameron <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> --- include/linux/iio/sw_device.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/include/linux/iio/sw_device.h +++ b/include/linux/iio/sw_device.h @@ -62,7 +62,7 @@ void iio_swd_group_init_type_name(struct 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 }
