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Subject[PATCH RFC 03/11] clk: sunxi: factors: Add clk cleanup in sunxi_factors_register() error path
Date
sunxi_factors_register() does not check for failures or cleanup after
clk_register_composite() or other clk-related calls.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
---
drivers/clk/sunxi/clk-factors.c | 43 +++++++++++++++++++++++++++--------------
1 file changed, 28 insertions(+), 15 deletions(-)

diff --git a/drivers/clk/sunxi/clk-factors.c b/drivers/clk/sunxi/clk-factors.c
index 928c079da193..1de57c22a358 100644
--- a/drivers/clk/sunxi/clk-factors.c
+++ b/drivers/clk/sunxi/clk-factors.c
@@ -172,7 +172,7 @@ struct clk *sunxi_factors_register(struct device_node *node,
struct clk_hw *mux_hw = NULL;
const char *clk_name = node->name;
const char *parents[FACTORS_MAX_PARENTS];
- int i = 0;
+ int ret, i = 0;

/* if we have a mux, we will have >1 parents */
i = of_clk_parent_fill(node, parents, FACTORS_MAX_PARENTS);
@@ -188,7 +188,7 @@ struct clk *sunxi_factors_register(struct device_node *node,

factors = kzalloc(sizeof(struct clk_factors), GFP_KERNEL);
if (!factors)
- return NULL;
+ goto err_factors;

/* set up factors properties */
factors->reg = reg;
@@ -199,10 +199,8 @@ struct clk *sunxi_factors_register(struct device_node *node,
/* Add a gate if this factor clock can be gated */
if (data->enable) {
gate = kzalloc(sizeof(struct clk_gate), GFP_KERNEL);
- if (!gate) {
- kfree(factors);
- return NULL;
- }
+ if (!gate)
+ goto err_gate;

/* set up gate properties */
gate->reg = reg;
@@ -214,11 +212,8 @@ struct clk *sunxi_factors_register(struct device_node *node,
/* Add a mux if this factor clock can be muxed */
if (data->mux) {
mux = kzalloc(sizeof(struct clk_mux), GFP_KERNEL);
- if (!mux) {
- kfree(factors);
- kfree(gate);
- return NULL;
- }
+ if (!mux)
+ goto err_mux;

/* set up gate properties */
mux->reg = reg;
@@ -233,11 +228,29 @@ struct clk *sunxi_factors_register(struct device_node *node,
mux_hw, &clk_mux_ops,
&factors->hw, &clk_factors_ops,
gate_hw, &clk_gate_ops, 0);
+ if (IS_ERR(clk))
+ goto err_register;

- if (!IS_ERR(clk)) {
- of_clk_add_provider(node, of_clk_src_simple_get, clk);
- clk_register_clkdev(clk, clk_name, NULL);
- }
+ ret = of_clk_add_provider(node, of_clk_src_simple_get, clk);
+ if (ret)
+ goto err_provider;
+
+ ret = clk_register_clkdev(clk, clk_name, NULL);
+ if (ret)
+ goto err_clkdev;

return clk;
+
+err_clkdev:
+ of_clk_del_provider(node);
+err_provider:
+ clk_unregister_composite(clk);
+err_register:
+ kfree(mux);
+err_mux:
+ kfree(gate);
+err_gate:
+ kfree(factors);
+err_factors:
+ return NULL;
}
--
2.7.0
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