clk: ti: dra7-atl: don't allocate `parent_names' variable

The `parent_names' variable was freed also in case of kzalloc() error.
Instead of modifying the code to perform a proper memory release, I
decided to fix the bug by not allocating memory.
Since only one parent name is referenced, it is not necessary to
allocate this variable at runtime and therefore you can avoid calling
the kzalloc() function. This simplifies the code (even calls to kfree
can be removed) and improves the performance of the routine.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Reported-by: kernel test robot <lkp@intel.com>
Link: https://lore.kernel.org/r/20221113181147.1626585-2-dario.binacchi@amarulasolutions.com
Tested-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

diff --git a/drivers/clk/ti/clk-dra7-atl.c b/drivers/clk/ti/clk-dra7-atl.c
index 1c576599f6dbdd42918ce849524d28629163aef4..d964e3affd42cea42c02dadc7aa220360e3fba22 100644 (file)
--- a/drivers/clk/ti/clk-dra7-atl.c
+++ b/drivers/clk/ti/clk-dra7-atl.c
@@ -163,8 +163,8 @@ static const struct clk_ops atl_clk_ops = {
 static void __init of_dra7_atl_clock_setup(struct device_node *node)
 {
        struct dra7_atl_desc *clk_hw = NULL;
+       struct clk_parent_data pdata = { .index = 0 };
        struct clk_init_data init = { NULL };
-       const char **parent_names = NULL;
        const char *name;
        struct clk *clk;
 
@@ -188,24 +188,14 @@ static void __init of_dra7_atl_clock_setup(struct device_node *node)
                goto cleanup;
        }
 
-       parent_names = kzalloc(sizeof(char *), GFP_KERNEL);
-
-       if (!parent_names)
-               goto cleanup;
-
-       parent_names[0] = of_clk_get_parent_name(node, 0);
-
-       init.parent_names = parent_names;
-
+       init.parent_data = &pdata;
        clk = of_ti_clk_register(node, &clk_hw->hw, name);
 
        if (!IS_ERR(clk)) {
                of_clk_add_provider(node, of_clk_src_simple_get, clk);
-               kfree(parent_names);
                return;
        }
 cleanup:
-       kfree(parent_names);
        kfree(clk_hw);
 }
 CLK_OF_DECLARE(dra7_atl_clock, "ti,dra7-atl-clock", of_dra7_atl_clock_setup);