[frank-w-bpi-r2-4.14:6.12-rsslro 62/70] drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c:614:11: warning: variable 'pd' is used uninitialized whenever 'if' condition is false

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

tree:   https://github.com/frank-w/BPI-R2-4.14 6.12-rsslro
head:   edb2a7a8be4be71a6502d19afd5b069f6d9fbacc
commit: de758cbe68d93ad88b262742e65efc2aa7490ecf [62/70] pinctrl: mediatek: add changes suggested by angelo
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20241028/202410281900.W3HLtP1B-lkp@intel.com/config)
compiler: clang version 19.1.2 (https://github.com/llvm/llvm-project 7ba7d8e2f7b6445b60679da826210cdde29eaf8b)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241028/202410281900.W3HLtP1B-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202410281900.W3HLtP1B-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c:606:6: warning: unused variable 'err' [-Wunused-variable]
     606 |         int err, pd;
         |             ^~~
>> drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c:614:11: warning: variable 'pd' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
     614 |         else if (!pullup)
         |                  ^~~~~~~
   drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c:620:56: note: uninitialized use occurs here
     620 |         return mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_PD, pd);
         |                                                               ^~
   drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c:614:7: note: remove the 'if' if its condition is always true
     614 |         else if (!pullup)
         |              ^~~~~~~~~~~~
     615 |                 pd = 1;
   drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c:606:13: note: initialize the variable 'pd' to silence this warning
     606 |         int err, pd;
         |                    ^
         |                     = 0
   drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c:602:12: warning: unused function 'mtk_pinconf_bias_set_pd' [-Wunused-function]
     602 | static int mtk_pinconf_bias_set_pd(struct mtk_pinctrl *hw,
         |            ^~~~~~~~~~~~~~~~~~~~~~~
   3 warnings generated.

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for MODVERSIONS
   Depends on [n]: MODULES [=y] && !COMPILE_TEST [=y]
   Selected by [y]:
   - RANDSTRUCT_FULL [=y] && (CC_HAS_RANDSTRUCT [=y] || GCC_PLUGINS [=n]) && MODULES [=y]


vim +614 drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c

   601	
   602	static int mtk_pinconf_bias_set_pd(struct mtk_pinctrl *hw,
   603					const struct mtk_pin_desc *desc,
   604					u32 pullup, u32 arg)
   605	{
   606		int err, pd;
   607	
   608		if (arg != MTK_DISABLE && arg != MTK_ENABLE)
   609			return -EINVAL;
   610	
   611		/* Either this */
   612		if (arg == MTK_DISABLE || pullup)
   613			pd = 0;
 > 614		else if (!pullup)
   615			pd = 1;
   616	
   617		/* Or this (but it's probably a bit too cryptic) */
   618		//pd = !(arg == MTK_DISABLE || pullup);
   619	
   620		return mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_PD, pd);
   621	

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