Re: [PATCH 2/3] clk: Introduce 'critical-clocks' property

[kernel test robot <lkp@intel.com>]

Hi Marek,

I love your patch! Perhaps something to improve:

[auto build test WARNING on clk/clk-next]
[also build test WARNING on v5.17-rc4 next-20220215]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Marek-Vasut/dt-bindings-clk-Introduce-critical-clocks-property/20220215-164757
base:   https://git.kernel.org/pub/scm/linux/kernel/git/clk/linux.git clk-next
config: x86_64-randconfig-a002-20220214 (https://download.01.org/0day-ci/archive/20220215/202202152152.8a7M9Tkv-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 37f422f4ac31c8b8041c6b62065263314282dab6)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/aded04bc3dec13df3f940621d94d84e32ff8a5ea
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Marek-Vasut/dt-bindings-clk-Introduce-critical-clocks-property/20220215-164757
        git checkout aded04bc3dec13df3f940621d94d84e32ff8a5ea
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/clk/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> drivers/clk/clk.c:3881:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
           int ret, i, index;
               ^
   1 warning generated.


vim +/ret +3881 drivers/clk/clk.c

  3874	
  3875	static void
  3876	__clk_register_critical_clock(struct device_node *np, struct clk_core *core,
  3877				      struct clk_hw *hw)
  3878	{
  3879		struct of_phandle_args clkspec;
  3880		u32 clksize, clktotal;
> 3881		int ret, i, index;
  3882	
  3883		if (!np)
  3884			return;
  3885	
  3886		if (!core->ops->match_clkspec)
  3887			return;
  3888	
  3889		if (of_property_read_u32(np, "#clock-cells", &clksize))
  3890			return;
  3891	
  3892		/* Clock node with #clock-cells = <0> uses critical-clocks; */
  3893		if (clksize == 0) {
  3894			if (of_property_read_bool(np, "critical-clocks") &&
  3895			    !core->ops->match_clkspec(hw, &clkspec))
  3896				core->flags |= CLK_IS_CRITICAL;
  3897			return;
  3898		}
  3899	
  3900		clkspec.np = np;
  3901		clktotal = of_property_count_u32_elems(np, "critical-clocks");
  3902		clktotal /= clksize;
  3903		for (index = 0; index < clktotal; index++) {
  3904			for (i = 0; i < clksize; i++) {
  3905				ret = of_property_read_u32_index(np, "critical-clocks",
  3906								 (index * clksize) + i,
  3907								 &(clkspec.args[i]));
  3908			}
  3909			if (!core->ops->match_clkspec(hw, &clkspec))
  3910				core->flags |= CLK_IS_CRITICAL;
  3911		}
  3912	}
  3913	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org