tree: https://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos.git exynos-drm-next head: ef1a179ae8eba0aeaac239a28ecdd0700412052a commit: 84d977a69917c18c9e0a65ed16b43dc889fdd97c [1/3] drm/exynos: Replace legacy gpio interface for gpiod interface config: riscv-randconfig-r006-20211122 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c133fb321f7ca6083ce15b6aa5bf89de6600e649) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install riscv cross compiling tool for clang build # apt-get install binutils-riscv64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos.git/commi... git remote add drm-exynos https://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos.git git fetch --no-tags drm-exynos exynos-drm-next git checkout 84d977a69917c18c9e0a65ed16b43dc889fdd97c # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=riscv

If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot lkp@intel.com

All warnings (new ones prefixed by >>):

...

drivers/gpu/drm/exynos/exynos_drm_dsi.c:1338:6: warning: variable 'ret' is used uninitialized whenever 'if' condition is true [-Wsometimes-uninitialized]

if (IS_ERR(dsi->te_gpio)) { ^~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/exynos/exynos_drm_dsi.c:1355:9: note: uninitialized use occurs here return ret; ^~~ drivers/gpu/drm/exynos/exynos_drm_dsi.c:1338:2: note: remove the 'if' if its condition is always false if (IS_ERR(dsi->te_gpio)) { ^~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/gpu/drm/exynos/exynos_drm_dsi.c:1334:9: note: initialize the variable 'ret' to silence this warning int ret; ^ = 0 1 warning generated.

vim +1338 drivers/gpu/drm/exynos/exynos_drm_dsi.c

1330 1331 static int exynos_dsi_register_te_irq(struct exynos_dsi *dsi, 1332 struct device *panel) 1333 { 1334 int ret; 1335 int te_gpio_irq; 1336 1337 dsi->te_gpio = devm_gpiod_get_optional(dsi->dev, "te", GPIOD_IN);

1338 if (IS_ERR(dsi->te_gpio)) {

1339 dev_err(dsi->dev, "gpio request failed with %ld\n", 1340 PTR_ERR(dsi->te_gpio)); 1341 goto out; 1342 } 1343 1344 te_gpio_irq = gpiod_to_irq(dsi->te_gpio); 1345 1346 ret = request_threaded_irq(te_gpio_irq, exynos_dsi_te_irq_handler, NULL, 1347 IRQF_TRIGGER_RISING | IRQF_NO_AUTOEN, "TE", dsi); 1348 if (ret) { 1349 dev_err(dsi->dev, "request interrupt failed with %d\n", ret); 1350 gpiod_put(dsi->te_gpio); 1351 goto out; 1352 } 1353 1354 out: 1355 return ret; 1356 } 1357

--- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org