Re: [PATCH v1 2/2] hwmon: Driver for Nuvoton NCT736X

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

Hi,

kernel test robot noticed the following build warnings:

[auto build test WARNING on linus/master]
[also build test WARNING on v6.7-rc4 next-20231205]
[cannot apply to groeck-staging/hwmon-next]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/baneric926-gmail-com/dt-bindings-hwmon-Add-nct736x-bindings/20231204-135942
base:   linus/master
patch link:    https://lore.kernel.org/r/20231204055650.788388-3-kcfeng0%40nuvoton.com
patch subject: [PATCH v1 2/2] hwmon: Driver for Nuvoton NCT736X
config: um-randconfig-001-20231205 (https://download.01.org/0day-ci/archive/20231205/202312052243.AbRqbNyT-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-12) 11.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231205/202312052243.AbRqbNyT-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/202312052243.AbRqbNyT-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/hwmon/nct736x.c: In function 'nct736x_init_chip.constprop':
>> drivers/hwmon/nct736x.c:367:15: warning: 'gpio0_3' is used uninitialized [-Wuninitialized]
     367 |         ret = nct736x_write_reg(client, NCT736X_REG_GPIO_0_3, gpio0_3);
         |               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/gpio0_3 +367 drivers/hwmon/nct736x.c

   334	
   335	static int nct736x_init_chip(struct i2c_client *client,
   336				     u32 pwm_mask, u32 fanin_mask, u32 wdt_cfg)
   337	{
   338		const struct i2c_device_id *id = i2c_match_id(nct736x_id, client);
   339		u8 i, gpio0_3, gpio4_7, gpio10_13, gpio14_17;
   340		int ret;
   341	
   342		for (i = 0; i < NCT736X_PWM_COUNT; i++) {
   343			if (i < 4) {
   344				if (pwm_mask & BIT_CHECK(i))
   345					gpio0_3 |= PWM_SEL(i);
   346				if (fanin_mask & BIT_CHECK(i))
   347					gpio10_13 |= FANIN_SEL(i);
   348			} else if (i < 8) {
   349				if (pwm_mask & BIT_CHECK(i))
   350					gpio4_7 |= PWM_SEL(i);
   351				if (fanin_mask & BIT_CHECK(i))
   352					gpio14_17 |= FANIN_SEL(i);
   353			} else if (i < 12) {
   354				if (pwm_mask & BIT_CHECK(i))
   355					gpio10_13 |= PWM_SEL(i);
   356				if (fanin_mask & BIT_CHECK(i))
   357					gpio0_3 |= FANIN_SEL(i);
   358			} else {
   359				if (pwm_mask & BIT_CHECK(i))
   360					gpio14_17 |= PWM_SEL(i);
   361				if (fanin_mask & BIT_CHECK(i))
   362					gpio4_7 |= FANIN_SEL(i);
   363			}
   364		}
   365	
   366		/* Pin Function Configuration */
 > 367		ret = nct736x_write_reg(client, NCT736X_REG_GPIO_0_3, gpio0_3);
   368		if (ret < 0)
   369			return ret;
   370		ret = nct736x_write_reg(client, NCT736X_REG_GPIO_4_7, gpio4_7);
   371		if (ret < 0)
   372			return ret;
   373		ret = nct736x_write_reg(client, NCT736X_REG_GPIO_10_13, gpio10_13);
   374		if (ret < 0)
   375			return ret;
   376		ret = nct736x_write_reg(client, NCT736X_REG_GPIO_14_17, gpio14_17);
   377		if (ret < 0)
   378			return ret;
   379	
   380		/* PWM and FANIN Monitoring Enable */
   381		ret = nct736x_write_reg(client, NCT736X_REG_PWMEN_0_7,
   382					pwm_mask & 0xff);
   383		if (ret < 0)
   384			return ret;
   385		ret = nct736x_write_reg(client,
   386					NCT736X_REG_PWMEN_8_15, (pwm_mask >> 8) & 0xff);
   387		if (ret < 0)
   388			return ret;
   389		ret = nct736x_write_reg(client, NCT736X_REG_FANINEN_0_7,
   390					fanin_mask & 0xff);
   391		if (ret < 0)
   392			return ret;
   393		ret = nct736x_write_reg(client, NCT736X_REG_FANINEN_8_15,
   394					(fanin_mask >> 8) & 0xff);
   395		if (ret < 0)
   396			return ret;
   397	
   398		/* Watchdog Timer Configuration */
   399		if (wdt_cfg != 0xff && id->driver_data == nct7363) {
   400			ret = nct736x_write_reg(client, NCT7363_REG_WDT, wdt_cfg);
   401			if (ret < 0)
   402				return ret;
   403		}
   404	
   405		return 0;
   406	}
   407	

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