linux-kernel - Re: drivers/spmi/spmi-pmic-arb.c:1782 spmi_pmic_arb_register_buses() error: uninitialized symbol 'ret'.

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Message-ID: <92d5e28d2e7013ff393ed5d0ce1538fd.sboyd@kernel.org>
Date: Wed, 09 Oct 2024 15:58:54 -0700
From: Stephen Boyd <sboyd@...nel.org>
To: Abel Vesa <abel.vesa@...aro.org>, Dan Carpenter <dan.carpenter@...aro.org>, oe-kbuild@...ts.linux.dev
Cc: lkp@...el.com, oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org, Neil Armstrong <neil.armstrong@...aro.org>
Subject: Re: drivers/spmi/spmi-pmic-arb.c:1782 spmi_pmic_arb_register_buses() error: uninitialized symbol 'ret'.

Quoting Dan Carpenter (2024-09-18 03:29:07)
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   adfc3ded5c33d67e822525f95404ef0becb099b8
> commit: 9799873717398e8fa1727482e578b9d777da645e spmi: pmic-arb: Add multi bus support
> config: mips-randconfig-r072-20240916 (https://download.01.org/0day-ci/archive/20240916/202409162313.TnpH4qKB-lkp@intel.com/config)
> compiler: mips64-linux-gcc (GCC) 14.1.0
> 
> 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@...el.com>
> | Reported-by: Dan Carpenter <dan.carpenter@...aro.org>
> | Closes: https://lore.kernel.org/r/202409162313.TnpH4qKB-lkp@intel.com/
> 
> smatch warnings:
> drivers/spmi/spmi-pmic-arb.c:1782 spmi_pmic_arb_register_buses() error: uninitialized symbol 'ret'.
> 
> vim +/ret +1782 drivers/spmi/spmi-pmic-arb.c
> 
> 9799873717398e8 Abel Vesa 2024-05-07  1762  static int spmi_pmic_arb_register_buses(struct spmi_pmic_arb *pmic_arb,
> 9799873717398e8 Abel Vesa 2024-05-07  1763                                      struct platform_device *pdev)
> 9799873717398e8 Abel Vesa 2024-05-07  1764  {
> 9799873717398e8 Abel Vesa 2024-05-07  1765      struct device *dev = &pdev->dev;
> 9799873717398e8 Abel Vesa 2024-05-07  1766      struct device_node *node = dev->of_node;
> 9799873717398e8 Abel Vesa 2024-05-07  1767      struct device_node *child;
> 9799873717398e8 Abel Vesa 2024-05-07  1768      int ret;
> 9799873717398e8 Abel Vesa 2024-05-07  1769  
> 9799873717398e8 Abel Vesa 2024-05-07  1770      /* legacy mode doesn't provide child node for the bus */
> 9799873717398e8 Abel Vesa 2024-05-07  1771      if (of_device_is_compatible(node, "qcom,spmi-pmic-arb"))
> 9799873717398e8 Abel Vesa 2024-05-07  1772              return spmi_pmic_arb_bus_init(pdev, node, pmic_arb);
> 9799873717398e8 Abel Vesa 2024-05-07  1773  
> 9799873717398e8 Abel Vesa 2024-05-07  1774      for_each_available_child_of_node(node, child) {
> 9799873717398e8 Abel Vesa 2024-05-07  1775              if (of_node_name_eq(child, "spmi")) {
> 9799873717398e8 Abel Vesa 2024-05-07  1776                      ret = spmi_pmic_arb_bus_init(pdev, child, pmic_arb);
> 9799873717398e8 Abel Vesa 2024-05-07  1777                      if (ret)
> 9799873717398e8 Abel Vesa 2024-05-07  1778                              return ret;
> 9799873717398e8 Abel Vesa 2024-05-07  1779              }
> 9799873717398e8 Abel Vesa 2024-05-07  1780      }
> 9799873717398e8 Abel Vesa 2024-05-07  1781  
> 9799873717398e8 Abel Vesa 2024-05-07 @1782      return ret;
> 
> Is it possible to not have an spmi node?

I'm amendable to a 'return 0' here.