Hi Ivan,

kernel test robot noticed the following build warnings:

[auto build test WARNING on net-next/main]

url:    https://github.com/intel-lab-lkp/linux/commits/Ivan-Vecera/dpll-zl3073x-Store-raw-register-values-instead-of-parsed-state/20251111-020236
base:   net-next/main
patch link:    https://lore.kernel.org/r/20251110175818.1571610-6-ivecera%40redhat.com
patch subject: [PATCH net-next 5/6] dpll: zl3073x: Cache all output properties in zl3073x_out
config: sparc64-allmodconfig (https://download.01.org/0day-ci/archive/20251111/202511111809.FLxbtr0Z-lkp@intel.com/config)
compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 996639d6ebb86ff15a8c99b67f1c2e2117636ae7)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251111/202511111809.FLxbtr0Z-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 [off-list ref]
| Closes: https://lore.kernel.org/oe-kbuild-all/202511111809.FLxbtr0Z-lkp@intel.com/ (local)

All warnings (new ones prefixed by >>):

quoted

drivers/dpll/zl3073x/dpll.c:1488:43: warning: variable 'name' is uninitialized when used here [-Wuninitialized]

    1488 |                                 "%s%u is driven by different DPLL\n", name,
         |                                                                       ^~~~
   drivers/dpll/zl3073x/dpll.c:1467:18: note: initialize the variable 'name' to silence this warning
    1467 |         const char *name;
         |                         ^
         |                          = NULL
   drivers/dpll/zl3073x/dpll.c:1651:28: warning: variable 'ref' set but not used [-Wunused-but-set-variable]
    1651 |         const struct zl3073x_ref *ref;
         |                                   ^
   2 warnings generated.


vim +/name +1488 drivers/dpll/zl3073x/dpll.c

75a71ecc24125f9 Ivan Vecera 2025-07-04  1446  
75a71ecc24125f9 Ivan Vecera 2025-07-04  1447  /**
75a71ecc24125f9 Ivan Vecera 2025-07-04  1448   * zl3073x_dpll_pin_is_registrable - check if the pin is registrable
75a71ecc24125f9 Ivan Vecera 2025-07-04  1449   * @zldpll: pointer to zl3073x_dpll structure
75a71ecc24125f9 Ivan Vecera 2025-07-04  1450   * @dir: pin direction
75a71ecc24125f9 Ivan Vecera 2025-07-04  1451   * @index: pin index
75a71ecc24125f9 Ivan Vecera 2025-07-04  1452   *
75a71ecc24125f9 Ivan Vecera 2025-07-04  1453   * Checks if the given pin can be registered to given DPLL. For both
75a71ecc24125f9 Ivan Vecera 2025-07-04  1454   * directions the pin can be registered if it is enabled. In case of
75a71ecc24125f9 Ivan Vecera 2025-07-04  1455   * differential signal type only P-pin is reported as registrable.
75a71ecc24125f9 Ivan Vecera 2025-07-04  1456   * And additionally for the output pin, the pin can be registered only
75a71ecc24125f9 Ivan Vecera 2025-07-04  1457   * if it is connected to synthesizer that is driven by given DPLL.
75a71ecc24125f9 Ivan Vecera 2025-07-04  1458   *
75a71ecc24125f9 Ivan Vecera 2025-07-04  1459   * Return: true if the pin is registrable, false if not
75a71ecc24125f9 Ivan Vecera 2025-07-04  1460   */
75a71ecc24125f9 Ivan Vecera 2025-07-04  1461  static bool
75a71ecc24125f9 Ivan Vecera 2025-07-04  1462  zl3073x_dpll_pin_is_registrable(struct zl3073x_dpll *zldpll,
75a71ecc24125f9 Ivan Vecera 2025-07-04  1463  				enum dpll_pin_direction dir, u8 index)
75a71ecc24125f9 Ivan Vecera 2025-07-04  1464  {
75a71ecc24125f9 Ivan Vecera 2025-07-04  1465  	struct zl3073x_dev *zldev = zldpll->dev;
75a71ecc24125f9 Ivan Vecera 2025-07-04  1466  	bool is_diff, is_enabled;
75a71ecc24125f9 Ivan Vecera 2025-07-04  1467  	const char *name;
75a71ecc24125f9 Ivan Vecera 2025-07-04  1468  
75a71ecc24125f9 Ivan Vecera 2025-07-04  1469  	if (dir == DPLL_PIN_DIRECTION_INPUT) {
b35db42141ccf2a Ivan Vecera 2025-11-10  1470  		u8 ref_id = zl3073x_input_pin_ref_get(index);
b35db42141ccf2a Ivan Vecera 2025-11-10  1471  		const struct zl3073x_ref *ref;
75a71ecc24125f9 Ivan Vecera 2025-07-04  1472  
75a71ecc24125f9 Ivan Vecera 2025-07-04  1473  		/* Skip the pin if the DPLL is running in NCO mode */
75a71ecc24125f9 Ivan Vecera 2025-07-04  1474  		if (zldpll->refsel_mode == ZL_DPLL_MODE_REFSEL_MODE_NCO)
75a71ecc24125f9 Ivan Vecera 2025-07-04  1475  			return false;
75a71ecc24125f9 Ivan Vecera 2025-07-04  1476  
b35db42141ccf2a Ivan Vecera 2025-11-10  1477  		name = "REF";
b35db42141ccf2a Ivan Vecera 2025-11-10  1478  		ref = zl3073x_ref_state_get(zldev, ref_id);
b35db42141ccf2a Ivan Vecera 2025-11-10  1479  		is_diff = zl3073x_ref_is_diff(ref);
b35db42141ccf2a Ivan Vecera 2025-11-10  1480  		is_enabled = zl3073x_ref_is_enabled(ref);
75a71ecc24125f9 Ivan Vecera 2025-07-04  1481  	} else {
75a71ecc24125f9 Ivan Vecera 2025-07-04  1482  		/* Output P&N pair shares single HW output */
75a71ecc24125f9 Ivan Vecera 2025-07-04  1483  		u8 out = zl3073x_output_pin_out_get(index);
75a71ecc24125f9 Ivan Vecera 2025-07-04  1484  
75a71ecc24125f9 Ivan Vecera 2025-07-04  1485  		/* Skip the pin if it is connected to different DPLL channel */
65b8e8e3bf41fda Ivan Vecera 2025-11-10  1486  		if (zl3073x_dev_out_dpll_get(zldev, out) != zldpll->id) {
75a71ecc24125f9 Ivan Vecera 2025-07-04  1487  			dev_dbg(zldev->dev,
75a71ecc24125f9 Ivan Vecera 2025-07-04 @1488  				"%s%u is driven by different DPLL\n", name,
75a71ecc24125f9 Ivan Vecera 2025-07-04  1489  				out);
75a71ecc24125f9 Ivan Vecera 2025-07-04  1490  
75a71ecc24125f9 Ivan Vecera 2025-07-04  1491  			return false;
75a71ecc24125f9 Ivan Vecera 2025-07-04  1492  		}
75a71ecc24125f9 Ivan Vecera 2025-07-04  1493  
11e61915b41b996 Ivan Vecera 2025-11-10  1494  		name = "OUT";
65b8e8e3bf41fda Ivan Vecera 2025-11-10  1495  		is_diff = zl3073x_dev_out_is_diff(zldev, out);
65b8e8e3bf41fda Ivan Vecera 2025-11-10  1496  		is_enabled = zl3073x_dev_output_pin_is_enabled(zldev, index);
75a71ecc24125f9 Ivan Vecera 2025-07-04  1497  	}
75a71ecc24125f9 Ivan Vecera 2025-07-04  1498  
75a71ecc24125f9 Ivan Vecera 2025-07-04  1499  	/* Skip N-pin if the corresponding input/output is differential */
75a71ecc24125f9 Ivan Vecera 2025-07-04  1500  	if (is_diff && zl3073x_is_n_pin(index)) {
75a71ecc24125f9 Ivan Vecera 2025-07-04  1501  		dev_dbg(zldev->dev, "%s%u is differential, skipping N-pin\n",
75a71ecc24125f9 Ivan Vecera 2025-07-04  1502  			name, index / 2);
75a71ecc24125f9 Ivan Vecera 2025-07-04  1503  
75a71ecc24125f9 Ivan Vecera 2025-07-04  1504  		return false;
75a71ecc24125f9 Ivan Vecera 2025-07-04  1505  	}
75a71ecc24125f9 Ivan Vecera 2025-07-04  1506  
75a71ecc24125f9 Ivan Vecera 2025-07-04  1507  	/* Skip the pin if it is disabled */
75a71ecc24125f9 Ivan Vecera 2025-07-04  1508  	if (!is_enabled) {
75a71ecc24125f9 Ivan Vecera 2025-07-04  1509  		dev_dbg(zldev->dev, "%s%u%c is disabled\n", name, index / 2,
75a71ecc24125f9 Ivan Vecera 2025-07-04  1510  			zl3073x_is_p_pin(index) ? 'P' : 'N');
75a71ecc24125f9 Ivan Vecera 2025-07-04  1511  
75a71ecc24125f9 Ivan Vecera 2025-07-04  1512  		return false;
75a71ecc24125f9 Ivan Vecera 2025-07-04  1513  	}
75a71ecc24125f9 Ivan Vecera 2025-07-04  1514  
75a71ecc24125f9 Ivan Vecera 2025-07-04  1515  	return true;
75a71ecc24125f9 Ivan Vecera 2025-07-04  1516  }
75a71ecc24125f9 Ivan Vecera 2025-07-04  1517  

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki