Re: [PATCH v5 2/5] phy: stm32: Add support for STM32MP25 COMBOPHY.

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

Hi Christian,

kernel test robot noticed the following build warnings:

[auto build test WARNING on atorgue-stm32/stm32-next]
[also build test WARNING on robh/for-next linus/master v6.11-rc6 next-20240904]
[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/Christian-Bruel/dt-bindings-phy-Add-STM32MP25-COMBOPHY-bindings/20240903-201737
base:   https://git.kernel.org/pub/scm/linux/kernel/git/atorgue/stm32.git stm32-next
patch link:    https://lore.kernel.org/r/20240903121303.2953150-3-christian.bruel%40foss.st.com
patch subject: [PATCH v5 2/5] phy: stm32: Add support for STM32MP25 COMBOPHY.
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20240904/202409041913.v0xzfcJ2-lkp@intel.com/config)
compiler: clang version 18.1.5 (https://github.com/llvm/llvm-project 617a15a9eac96088ae5e9134248d8236e34b91b1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240904/202409041913.v0xzfcJ2-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/202409041913.v0xzfcJ2-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/phy/st/phy-stm32-combophy.c:524:10: warning: variable 'ret' is uninitialized when used here [-Wuninitialized]
     524 |                 return ret;
         |                        ^~~
   drivers/phy/st/phy-stm32-combophy.c:509:9: note: initialize the variable 'ret' to silence this warning
     509 |         int ret, irq;
         |                ^
         |                 = 0
   1 warning generated.


vim +/ret +524 drivers/phy/st/phy-stm32-combophy.c

   503	
   504	static int stm32_combophy_probe(struct platform_device *pdev)
   505	{
   506		struct stm32_combophy *combophy;
   507		struct device *dev = &pdev->dev;
   508		struct phy_provider *phy_provider;
   509		int ret, irq;
   510	
   511		combophy = devm_kzalloc(dev, sizeof(*combophy), GFP_KERNEL);
   512		if (!combophy)
   513			return -ENOMEM;
   514	
   515		combophy->dev = dev;
   516	
   517		dev_set_drvdata(dev, combophy);
   518	
   519		combophy->base = devm_platform_ioremap_resource(pdev, 0);
   520		if (IS_ERR(combophy->base))
   521			return PTR_ERR(combophy->base);
   522	
   523		if (stm32_combophy_get_clocks(combophy))
 > 524			return ret;
   525	
   526		combophy->phy_reset = devm_reset_control_get(dev, "phy");
   527		if (IS_ERR(combophy->phy_reset))
   528			return dev_err_probe(dev, PTR_ERR(combophy->phy_reset),
   529					     "Failed to get PHY reset\n");
   530	
   531		combophy->regmap = syscon_regmap_lookup_by_compatible("st,stm32mp25-syscfg");
   532		if (IS_ERR(combophy->regmap))
   533			return dev_err_probe(dev, PTR_ERR(combophy->regmap),
   534					     "No syscfg specified\n");
   535	
   536		combophy->phy = devm_phy_create(dev, NULL, &stm32_combophy_phy_data);
   537		if (IS_ERR(combophy->phy))
   538			return dev_err_probe(dev, PTR_ERR(combophy->phy),
   539					     "failed to create PCIe/USB3 ComboPHY\n");
   540	
   541		if (device_property_read_bool(dev, "wakeup-source")) {
   542			irq = platform_get_irq(pdev, 0);
   543			if (irq < 0)
   544				return dev_err_probe(dev, irq, "failed to get IRQ\n");
   545			combophy->irq_wakeup = irq;
   546	
   547			ret = devm_request_threaded_irq(dev, combophy->irq_wakeup, NULL,
   548							stm32_combophy_irq_wakeup_handler, IRQF_ONESHOT,
   549							NULL, NULL);
   550			if (ret)
   551				return dev_err_probe(dev, ret, "unable to request wake IRQ %d\n",
   552							 combophy->irq_wakeup);
   553		}
   554	
   555		ret = devm_pm_runtime_enable(dev);
   556		if (ret)
   557			return dev_err_probe(dev, ret, "Failed to enable pm runtime\n");
   558	
   559		phy_set_drvdata(combophy->phy, combophy);
   560	
   561		phy_provider = devm_of_phy_provider_register(dev, stm32_combophy_xlate);
   562	
   563		return PTR_ERR_OR_ZERO(phy_provider);
   564	}
   565	

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