clk: spear: 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>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Message-ID: <d4500d249021013d52aa87407f875dc203a251df.1787239813.git.geert+renesas@glider.be>
Signed-off-by: Brian Masney <bmasney@redhat.com>

drivers/clk/spear/clk-aux-synth.c

@@ -138,8 +138,8 @@ struct clk *clk_register_aux(const char *aux_name, const char *gate_name,
 	        const struct aux_clk_masks *masks, struct aux_rate_tbl *rtbl,
 		u8 rtbl_cnt, spinlock_t *lock, struct clk **gate_clk)
 {
+	struct clk_init_data init = {};
 	struct clk_aux *aux;
-	struct clk_init_data init;
 	struct clk *clk;
 
 	if (!aux_name || !parent_name || !reg || !rtbl || !rtbl_cnt) {

drivers/clk/spear/clk-frac-synth.c

@@ -125,7 +125,7 @@ struct clk *clk_register_frac(const char *name, const char *parent_name,
 		unsigned long flags, void __iomem *reg,
 		struct frac_rate_tbl *rtbl, u8 rtbl_cnt, spinlock_t *lock)
 {
-	struct clk_init_data init;
+	struct clk_init_data init = {};
 	struct clk_frac *frac;
 	struct clk *clk;
 

drivers/clk/spear/clk-gpt-synth.c

@@ -114,7 +114,7 @@ struct clk *clk_register_gpt(const char *name, const char *parent_name, unsigned
 		long flags, void __iomem *reg, struct gpt_rate_tbl *rtbl, u8
 		rtbl_cnt, spinlock_t *lock)
 {
-	struct clk_init_data init;
+	struct clk_init_data init = {};
 	struct clk_gpt *gpt;
 	struct clk *clk;
 

drivers/clk/spear/clk-vco-pll.c

@@ -284,7 +284,7 @@ struct clk *clk_register_vco_pll(const char *vco_name, const char *pll_name,
 	struct clk_vco *vco;
 	struct clk_pll *pll;
 	struct clk *vco_clk, *tpll_clk, *tvco_gate_clk;
-	struct clk_init_data vco_init, pll_init;
+	struct clk_init_data vco_init = {}, pll_init = {};
 	const char **vco_parent_name;
 
 	if (!vco_name || !pll_name || !parent_name || !mode_reg || !cfg_reg ||