Hi Linus, I love your patch! Perhaps something to improve: [auto build test WARNING on backlight/for-backlight-next] [also build test WARNING on arm-soc/for-next spi/for-next tegra-drm/drm/tegra/for-next v5.7-rc3 next-20200428] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Linus-Walleij/backlight-lms283gf05-Convert-to-GPIO-descriptors/20200429-181222 base: https://git.kernel.org/pub/scm/linux/kernel/git/lee/backlight.git for-backlight-next config: c6x-allyesconfig (attached as .config) compiler: c6x-elf-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day GCC_VERSION=9.3.0 make.cross ARCH=c6x If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp@xxxxxxxxx> All warnings (new ones prefixed by >>): drivers/video/backlight/lms283gf05.c: In function 'lms283gf05_probe': drivers/video/backlight/lms283gf05.c:151:6: warning: unused variable 'ret' [-Wunused-variable] 151 | int ret = 0; | ^~~ >> drivers/video/backlight/lms283gf05.c:153:12: warning: 'st' is used uninitialized in this function [-Wuninitialized] 153 | st->reset = gpiod_get_optional(&spi->dev, "reset", GPIOD_OUT_HIGH); | ~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ vim +/st +153 drivers/video/backlight/lms283gf05.c 146 147 static int lms283gf05_probe(struct spi_device *spi) 148 { 149 struct lms283gf05_state *st; 150 struct lcd_device *ld; > 151 int ret = 0; 152 > 153 st->reset = gpiod_get_optional(&spi->dev, "reset", GPIOD_OUT_HIGH); 154 if (st->reset) 155 gpiod_set_consumer_name(st->reset, "LMS283GF05 RESET"); 156 157 st = devm_kzalloc(&spi->dev, sizeof(struct lms283gf05_state), 158 GFP_KERNEL); 159 if (st == NULL) 160 return -ENOMEM; 161 162 ld = devm_lcd_device_register(&spi->dev, "lms283gf05", &spi->dev, st, 163 &lms_ops); 164 if (IS_ERR(ld)) 165 return PTR_ERR(ld); 166 167 st->spi = spi; 168 st->ld = ld; 169 170 spi_set_drvdata(spi, st); 171 172 /* kick in the LCD */ 173 if (st->reset) 174 lms283gf05_reset(st->reset); 175 lms283gf05_toggle(spi, disp_initseq, ARRAY_SIZE(disp_initseq)); 176 177 return 0; 178 } 179 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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