[PATCH 34/45] clk: stm32: 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.

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

Signed-off-by: Geert Uytterhoeven <geert+renesas at glider.be>
---
Compile-tested only.
---
 drivers/clk/clk-stm32f4.c        | 4 ++--
 drivers/clk/clk-stm32h7.c        | 2 +-
 drivers/clk/stm32/clk-stm32mp1.c | 4 ++--
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/clk/clk-stm32f4.c b/drivers/clk/clk-stm32f4.c
index 565b4d99bebb06e8..6603d4815514151a 100644
--- a/drivers/clk/clk-stm32f4.c
+++ b/drivers/clk/clk-stm32f4.c
@@ -485,8 +485,8 @@ static struct clk *clk_register_apb_mul(struct device *dev, const char *name,
 					const char *parent_name,
 					unsigned long flags, u8 bit_idx)
 {
+	struct clk_init_data init = {};
 	struct clk_apb_mul *am;
-	struct clk_init_data init;
 	struct clk *clk;
 
 	am = kzalloc_obj(*am);
@@ -810,8 +810,8 @@ static struct clk_hw *clk_register_pll_div(const char *name,
 		struct clk_hw *pll_hw, spinlock_t *lock)
 {
 	struct stm32f4_pll_div *pll_div;
+	struct clk_init_data init = {};
 	struct clk_hw *hw;
-	struct clk_init_data init;
 	int ret;
 
 	/* allocate the divider */
diff --git a/drivers/clk/clk-stm32h7.c b/drivers/clk/clk-stm32h7.c
index 82e0789cf189c7cb..c6afa9b202351c04 100644
--- a/drivers/clk/clk-stm32h7.c
+++ b/drivers/clk/clk-stm32h7.c
@@ -462,8 +462,8 @@ static struct clk_hw *clk_register_stm32_timer_ker(struct device *dev,
 		u8 dppre_shift,
 		spinlock_t *lock)
 {
+	struct clk_init_data init = {};
 	struct timer_ker *element;
-	struct clk_init_data init;
 	struct clk_hw *hw;
 	int err;
 
diff --git a/drivers/clk/stm32/clk-stm32mp1.c b/drivers/clk/stm32/clk-stm32mp1.c
index 2d9ccd96ec98c05e..b265e3f3e94c2805 100644
--- a/drivers/clk/stm32/clk-stm32mp1.c
+++ b/drivers/clk/stm32/clk-stm32mp1.c
@@ -902,8 +902,8 @@ static struct clk_hw *clk_register_pll(struct device *dev, const char *name,
 				       unsigned long flags,
 				       spinlock_t *lock)
 {
+	struct clk_init_data init = {};
 	struct stm32_pll_obj *element;
-	struct clk_init_data init;
 	struct clk_hw *hw;
 	int err;
 
@@ -1041,8 +1041,8 @@ static struct clk_hw *clk_register_cktim(struct device *dev, const char *name,
 					 void __iomem *timpre,
 					 spinlock_t *lock)
 {
+	struct clk_init_data init = {};
 	struct timer_cker *tim_ker;
-	struct clk_init_data init;
 	struct clk_hw *hw;
 	int err;
 
-- 
2.43.0