| Message ID | 20221113181147.1626585-2-dario.binacchi@amarulasolutions.com |
|---|---|
| State | New |
| Headers | show |
| Series |
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| Related | show |
Quoting Dario Binacchi (2022-11-13 10:11:47) > 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> > > --- Applied to clk-next
diff --git a/drivers/clk/ti/clk-dra7-atl.c b/drivers/clk/ti/clk-dra7-atl.c index 1c576599f6db..d964e3affd42 100644 --- 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);
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> --- (no changes since v3) Changes in v3: - Add the "clk: ti: add of_ti_clk_register() helper" patch to the series. - Use a variable of type struct clk_parent_data to furthermore simplify the code. - Update the commit message. Changes in v2: - Fix compiling error - Add kernel test robot's Reported-by tag. drivers/clk/ti/clk-dra7-atl.c | 14 ++------------ 1 file changed, 2 insertions(+), 12 deletions(-)