* Re: [PATCH 1/2] drm/sitronix/st7571-spi: Add support for ST75156 controller
[not found] <20261022-add_st75156_support-v1-1-582525a39a39@axis.com>
@ 2026-10-23 9:46 ` kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2026-10-23 9:46 UTC (permalink / raw)
To: Lars Rask, Marcus Folkesson, Maarten Lankhorst, Maxime Ripard,
Thomas Zimmermann, David Airlie, Simona Vetter, Rob Herring,
Krzysztof Kozlowski, Conor Dooley
Cc: llvm, oe-kbuild-all, dri-devel, linux-kernel, devicetree, kernel,
Lars Rask
Hi Lars,
kernel test robot noticed the following build warnings:
[auto build test WARNING on 8d3ae59288f1e7d58d76558a6ee96d533bc5019f]
url: https://github.com/intel-lab-lkp/linux/commits/Lars-Rask/drm-sitronix-st7571-spi-Add-support-for-ST75156-controller/20261022-173105
base: 8d3ae59288f1e7d58d76558a6ee96d533bc5019f
patch link: https://lore.kernel.org/r/20261022-add_st75156_support-v1-1-582525a39a39%40axis.com
patch subject: [PATCH 1/2] drm/sitronix/st7571-spi: Add support for ST75156 controller
config: i386-buildonly-randconfig-1001-20261023 (https://download.01.org/0day-ci/archive/20261023/202610231738.0gNssMIn-lkp@intel.com/config)
compiler: clang version 22.1.8 (https://github.com/llvm/llvm-project ca7933e47d3a3451d81e72ac174dcb5aa28b59d1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20261023/202610231738.0gNssMIn-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/202610231738.0gNssMIn-lkp@intel.com/
All warnings (new ones prefixed by >>):
>> drivers/gpu/drm/sitronix/st7571-spi.c:121:43: warning: variable 'regmap' is uninitialized when used here [-Wuninitialized]
121 | return dev_err_probe(&spi->dev, PTR_ERR(regmap),
| ^~~~~~
drivers/gpu/drm/sitronix/st7571-spi.c:116:23: note: initialize the variable 'regmap' to silence this warning
116 | struct regmap *regmap;
| ^
| = NULL
1 warning generated.
vim +/regmap +121 drivers/gpu/drm/sitronix/st7571-spi.c
112
113 static int st7571_spi_probe(struct spi_device *spi)
114 {
115 struct st7571_device *st7571;
116 struct regmap *regmap;
117 struct spi_device_data *spi_data;
118
119 spi_data = devm_kzalloc(&spi->dev, sizeof(*spi_data), GFP_KERNEL);
120 if (IS_ERR(spi_data))
> 121 return dev_err_probe(&spi->dev, PTR_ERR(regmap),
122 "Failed to initialize spi data\n");
123
124 spi_data->spi = spi;
125 spi_data->dc_gpio = devm_gpiod_get(&spi->dev, "dc", GPIOD_OUT_LOW);
126
127 if (IS_ERR(spi_data->dc_gpio))
128 /* init regmap for 3 line SPI */
129 regmap = devm_regmap_init_spi(spi, &st7571_spi_regmap_config);
130 else
131 /* init regmap for 4 line SPI */
132 regmap = devm_regmap_init(&spi->dev, ®map_spi_dc_bus,
133 spi_data, &st7571_spi_regmap_config);
134
135 if (IS_ERR(regmap))
136 return dev_err_probe(&spi->dev, PTR_ERR(regmap),
137 "Failed to initialize regmap\n");
138
139 st7571 = st7571_probe(&spi->dev, regmap);
140 if (IS_ERR(st7571))
141 return dev_err_probe(&spi->dev, PTR_ERR(st7571),
142 "Failed to initialize regmap\n");
143
144 st7571->spi_data = spi_data;
145 spi_set_drvdata(spi, st7571);
146
147 return 0;
148 }
149
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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