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Message-ID: <202312070522.71CNBJ25-lkp@intel.com>
Date: Thu, 7 Dec 2023 05:41:51 +0800
From: kernel test robot <lkp@...el.com>
To: Rouven Czerwinski <r.czerwinski@...gutronix.de>,
Josua Mayer <josua@...id-run.com>,
Johannes Berg <johannes.berg@...el.com>,
linux-wireless@...r.kernel.org, netdev@...r.kernel.org,
linux-kernel@...r.kernel.org
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
kernel@...gutronix.de,
Rouven Czerwinski <r.czerwinski@...gutronix.de>,
stable@...r.kernel.org, Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>
Subject: Re: [PATCH] net: rfkill: gpio: set GPIO direction
Hi Rouven,
kernel test robot noticed the following build warnings:
[auto build test WARNING on 994d5c58e50e91bb02c7be4a91d5186292a895c8]
url: https://github.com/intel-lab-lkp/linux/commits/Rouven-Czerwinski/net-rfkill-gpio-set-GPIO-direction/20231206-211525
base: 994d5c58e50e91bb02c7be4a91d5186292a895c8
patch link: https://lore.kernel.org/r/20231206131336.3099727-1-r.czerwinski%40pengutronix.de
patch subject: [PATCH] net: rfkill: gpio: set GPIO direction
config: powerpc-allmodconfig (https://download.01.org/0day-ci/archive/20231207/202312070522.71CNBJ25-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231207/202312070522.71CNBJ25-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202312070522.71CNBJ25-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> net/rfkill/rfkill-gpio.c:129:6: warning: variable 'ret' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized]
129 | if (rfkill->reset_gpio)
| ^~~~~~~~~~~~~~~~~~
net/rfkill/rfkill-gpio.c:131:6: note: uninitialized use occurs here
131 | if (ret)
| ^~~
net/rfkill/rfkill-gpio.c:129:2: note: remove the 'if' if its condition is always true
129 | if (rfkill->reset_gpio)
| ^~~~~~~~~~~~~~~~~~~~~~~
130 | ret = gpiod_direction_output(rfkill->reset_gpio, true);
| ~~~~~~~~~~~~~~~~
net/rfkill/rfkill-gpio.c:82:9: note: initialize the variable 'ret' to silence this warning
82 | int ret;
| ^
| = 0
1 warning generated.
vim +129 net/rfkill/rfkill-gpio.c
74
75 static int rfkill_gpio_probe(struct platform_device *pdev)
76 {
77 struct rfkill_gpio_data *rfkill;
78 struct gpio_desc *gpio;
79 const char *name_property;
80 const char *type_property;
81 const char *type_name;
82 int ret;
83
84 rfkill = devm_kzalloc(&pdev->dev, sizeof(*rfkill), GFP_KERNEL);
85 if (!rfkill)
86 return -ENOMEM;
87
88 if (dev_of_node(&pdev->dev)) {
89 name_property = "label";
90 type_property = "radio-type";
91 } else {
92 name_property = "name";
93 type_property = "type";
94 }
95 device_property_read_string(&pdev->dev, name_property, &rfkill->name);
96 device_property_read_string(&pdev->dev, type_property, &type_name);
97
98 if (!rfkill->name)
99 rfkill->name = dev_name(&pdev->dev);
100
101 rfkill->type = rfkill_find_type(type_name);
102
103 if (ACPI_HANDLE(&pdev->dev)) {
104 ret = rfkill_gpio_acpi_probe(&pdev->dev, rfkill);
105 if (ret)
106 return ret;
107 }
108
109 rfkill->clk = devm_clk_get(&pdev->dev, NULL);
110
111 gpio = devm_gpiod_get_optional(&pdev->dev, "reset", GPIOD_ASIS);
112 if (IS_ERR(gpio))
113 return PTR_ERR(gpio);
114
115 rfkill->reset_gpio = gpio;
116
117 gpio = devm_gpiod_get_optional(&pdev->dev, "shutdown", GPIOD_ASIS);
118 if (IS_ERR(gpio))
119 return PTR_ERR(gpio);
120
121 rfkill->shutdown_gpio = gpio;
122
123 /* Make sure at-least one GPIO is defined for this instance */
124 if (!rfkill->reset_gpio && !rfkill->shutdown_gpio) {
125 dev_err(&pdev->dev, "invalid platform data\n");
126 return -EINVAL;
127 }
128
> 129 if (rfkill->reset_gpio)
130 ret = gpiod_direction_output(rfkill->reset_gpio, true);
131 if (ret)
132 return ret;
133
134 if (rfkill->shutdown_gpio)
135 ret = gpiod_direction_output(rfkill->shutdown_gpio, true);
136 if (ret)
137 return ret;
138
139 rfkill->rfkill_dev = rfkill_alloc(rfkill->name, &pdev->dev,
140 rfkill->type, &rfkill_gpio_ops,
141 rfkill);
142 if (!rfkill->rfkill_dev)
143 return -ENOMEM;
144
145 ret = rfkill_register(rfkill->rfkill_dev);
146 if (ret < 0)
147 goto err_destroy;
148
149 platform_set_drvdata(pdev, rfkill);
150
151 dev_info(&pdev->dev, "%s device registered.\n", rfkill->name);
152
153 return 0;
154
155 err_destroy:
156 rfkill_destroy(rfkill->rfkill_dev);
157
158 return ret;
159 }
160
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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