clk: mmp: Make sure clk_init_data is fully initialized

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@glider.be>
Message-ID: <c794be8edca2c373b12e925b101f7e298012e5d6.1787239813.git.geert+renesas@glider.be>
Signed-off-by: Brian Masney <bmasney@redhat.com>

drivers/clk/mmp/clk-apbc.c

@@ -120,9 +120,9 @@ struct clk *mmp_clk_register_apbc(const char *name, const char *parent_name,
 		void __iomem *base, unsigned int delay,
 		unsigned int apbc_flags, spinlock_t *lock)
 {
+	struct clk_init_data init = {};
 	struct clk_apbc *apbc;
 	struct clk *clk;
-	struct clk_init_data init;
 
 	apbc = kzalloc_obj(*apbc);
 	if (!apbc)

drivers/clk/mmp/clk-apmu.c

@@ -65,9 +65,9 @@ static const struct clk_ops clk_apmu_ops = {
 struct clk *mmp_clk_register_apmu(const char *name, const char *parent_name,
 		void __iomem *base, u32 enable_mask, spinlock_t *lock)
 {
+	struct clk_init_data init = {};
 	struct clk_apmu *apmu;
 	struct clk *clk;
-	struct clk_init_data init;
 
 	apmu = kzalloc_obj(*apmu);
 	if (!apmu)

drivers/clk/mmp/clk-frac.c

@@ -171,8 +171,8 @@ struct clk *mmp_clk_register_factor(const char *name, const char *parent_name,
 		struct mmp_clk_factor_masks *masks,
 		struct u32_fract *ftbl, unsigned int ftbl_cnt, spinlock_t *lock)
 {
+	struct clk_init_data init = {};
 	struct mmp_clk_factor *factor;
-	struct clk_init_data init;
 	struct clk *clk;
 
 	if (!masks) {

drivers/clk/mmp/clk-gate.c

@@ -94,9 +94,9 @@ struct clk *mmp_clk_register_gate(struct device *dev, const char *name,
 		void __iomem *reg, u32 mask, u32 val_enable, u32 val_disable,
 		unsigned int gate_flags, spinlock_t *lock)
 {
+	struct clk_init_data init = {};
 	struct mmp_clk_gate *gate;
 	struct clk *clk;
-	struct clk_init_data init;
 
 	/* allocate the gate */
 	gate = kzalloc_obj(*gate);

drivers/clk/mmp/clk-mix.c

@@ -444,9 +444,9 @@ struct clk *mmp_clk_register_mix(struct device *dev,
 					struct mmp_clk_mix_config *config,
 					spinlock_t *lock)
 {
+	struct clk_init_data init = {};
 	struct mmp_clk_mix *mix;
 	struct clk *clk;
-	struct clk_init_data init;
 
 	mix = kzalloc_obj(*mix);
 	if (!mix)

drivers/clk/mmp/clk-pll.c

@@ -104,9 +104,9 @@ static struct clk *mmp_clk_register_pll(char *name,
 			unsigned long input_rate,
 			void __iomem *postdiv_reg, u8 postdiv_shift)
 {
+	struct clk_init_data init = {};
 	struct mmp_clk_pll *pll;
 	struct clk *clk;
-	struct clk_init_data init;
 
 	pll = kzalloc_obj(*pll);
 	if (!pll)