From 4e3c021fb995bcbb5d1f814d00584cb80eb904a8 Mon Sep 17 00:00:00 2001 From: Krzysztof Kozlowski Date: Mon, 5 Jan 2015 10:52:40 +0100 Subject: [PATCH] clk: Add clk_unregister_{divider, gate, mux} to close memory leak The common clk_register_{divider,gate,mux} functions allocated memory for internal data which wasn't freed anywhere. Drivers using these helpers could only unregister clocks but the memory would still leak. Add corresponding unregister functions which will release all resources. Signed-off-by: Krzysztof Kozlowski Reviewed-by: Stephen Boyd Signed-off-by: Michael Turquette --- drivers/clk/clk-divider.c | 16 ++++++++++++++++ drivers/clk/clk-gate.c | 16 ++++++++++++++++ drivers/clk/clk-mux.c | 16 ++++++++++++++++ include/linux/clk-provider.h | 4 ++++ 4 files changed, 52 insertions(+) --- a/drivers/clk/clk-divider.c +++ b/drivers/clk/clk-divider.c @@ -461,3 +461,19 @@ struct clk *clk_register_divider_table(s width, clk_divider_flags, table, lock); } EXPORT_SYMBOL_GPL(clk_register_divider_table); + +void clk_unregister_divider(struct clk *clk) +{ + struct clk_divider *div; + struct clk_hw *hw; + + hw = __clk_get_hw(clk); + if (!hw) + return; + + div = to_clk_divider(hw); + + clk_unregister(clk); + kfree(div); +} +EXPORT_SYMBOL_GPL(clk_unregister_divider); --- a/drivers/clk/clk-gate.c +++ b/drivers/clk/clk-gate.c @@ -162,3 +162,19 @@ struct clk *clk_register_gate(struct dev return clk; } EXPORT_SYMBOL_GPL(clk_register_gate); + +void clk_unregister_gate(struct clk *clk) +{ + struct clk_gate *gate; + struct clk_hw *hw; + + hw = __clk_get_hw(clk); + if (!hw) + return; + + gate = to_clk_gate(hw); + + clk_unregister(clk); + kfree(gate); +} +EXPORT_SYMBOL_GPL(clk_unregister_gate); --- a/drivers/clk/clk-mux.c +++ b/drivers/clk/clk-mux.c @@ -177,3 +177,19 @@ struct clk *clk_register_mux(struct devi NULL, lock); } EXPORT_SYMBOL_GPL(clk_register_mux); + +void clk_unregister_mux(struct clk *clk) +{ + struct clk_mux *mux; + struct clk_hw *hw; + + hw = __clk_get_hw(clk); + if (!hw) + return; + + mux = to_clk_mux(hw); + + clk_unregister(clk); + kfree(mux); +} +EXPORT_SYMBOL_GPL(clk_unregister_mux); --- a/include/linux/clk-provider.h +++ b/include/linux/clk-provider.h @@ -294,6 +294,7 @@ struct clk *clk_register_gate(struct dev const char *parent_name, unsigned long flags, void __iomem *reg, u8 bit_idx, u8 clk_gate_flags, spinlock_t *lock); +void clk_unregister_gate(struct clk *clk); struct clk_div_table { unsigned int val; @@ -361,6 +362,7 @@ struct clk *clk_register_divider_table(s void __iomem *reg, u8 shift, u8 width, u8 clk_divider_flags, const struct clk_div_table *table, spinlock_t *lock); +void clk_unregister_divider(struct clk *clk); /** * struct clk_mux - multiplexer clock @@ -414,6 +416,8 @@ struct clk *clk_register_mux_table(struc void __iomem *reg, u8 shift, u32 mask, u8 clk_mux_flags, u32 *table, spinlock_t *lock); +void clk_unregister_mux(struct clk *clk); + void of_fixed_factor_clk_setup(struct device_node *node); /**