[PATCH treewide 4/5] iio: frequency: adf4377: Make sure clk_init_data is fully initialized

[Geert Uytterhoeven]

The clk_init_data structure contains several mutually-exclusive members
for different methods to specify the possible parents of a clock,
prompting drivers to initialize only the members they need.  However,
not initializing all members may cause subtle issues, which are only
exposed when CONFIG_INIT_STACK_ALL_PATTERN or CONFIG_INIT_STACK_NONE is
enabled.

adf4377_clk_register() fills in init.parent_data, and assumes that
init.parent_names is NULL.  However, the latter in uninitialized, and
thus may cause a crash.

Make sure all members are fully initialized, to fix such bugs, and to
avoid future breakage when converting drivers to a different method for
specifying the parents.

Fixes: 60e5448ddbec2dc2 ("iio: frequency: adf4377: add clk provider support")
Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
---
Compile-tested only.
---
 drivers/iio/frequency/adf4377.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/iio/frequency/adf4377.c b/drivers/iio/frequency/adf4377.c
index 4dd19a9aa9943c57..f4eb9ba5878e1893 100644
--- a/drivers/iio/frequency/adf4377.c
+++ b/drivers/iio/frequency/adf4377.c
@@ -990,7 +990,7 @@ static int adf4377_clk_register(struct adf4377_state *st)
 {
 	struct spi_device *spi = st->spi;
 	struct device *dev = &spi->dev;
-	struct clk_init_data init;
+	struct clk_init_data init = {};
 	struct clk_parent_data parent_data;
 	int ret;
 
-- 
2.43.0