* kernel test robot <lkp@xxxxxxxxx> [210524 10:00]: > tree: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master > head: 674dc447b09fb668976c6ab1356b11e02ff209ed > commit: ec527f23e06a0521cd5b043aa31a4ccdf6cea549 [2881/4780] bus: ti-sysc: Fix am335x resume hang for usb otg module > config: arm-randconfig-r035-20210524 (attached as .config) > compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 93d1e5822ed64abd777eb94ea9899e96c4c39fbe) > 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 arm cross compiling tool for clang build > # apt-get install binutils-arm-linux-gnueabi > # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=ec527f23e06a0521cd5b043aa31a4ccdf6cea549 > git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git > git fetch --no-tags linux-next master > git checkout ec527f23e06a0521cd5b043aa31a4ccdf6cea549 > # save the attached .config to linux build tree > COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm > > If you fix the issue, kindly add following tag as appropriate > Reported-by: kernel test robot <lkp@xxxxxxxxx> > > All warnings (new ones prefixed by >>): > > >> drivers/bus/ti-sysc.c:1398:13: warning: variable 'error' is used uninitialized whenever 'if' condition is false [-Wsometimes-uninitialized] > } else if (ddata->needs_resume) { > ^~~~~~~~~~~~~~~~~~~ > drivers/bus/ti-sysc.c:1406:9: note: uninitialized use occurs here > return error; > ^~~~~ > drivers/bus/ti-sysc.c:1398:9: note: remove the 'if' if its condition is always true > } else if (ddata->needs_resume) { > ^~~~~~~~~~~~~~~~~~~~~~~~~ > drivers/bus/ti-sysc.c:1386:11: note: initialize the variable 'error' to silence this warning > int error; > ^ > = 0 > 1 warning generated. > > > vim +1398 drivers/bus/ti-sysc.c > > 1382 > 1383 static int __maybe_unused sysc_noirq_resume(struct device *dev) > 1384 { > 1385 struct sysc *ddata; > 1386 int error; > 1387 > 1388 ddata = dev_get_drvdata(dev); > 1389 > 1390 if (ddata->cfg.quirks & > 1391 (SYSC_QUIRK_LEGACY_IDLE | SYSC_QUIRK_NO_IDLE)) > 1392 return 0; > 1393 > 1394 if (ddata->cfg.quirks & SYSC_QUIRK_REINIT_ON_RESUME) { > 1395 error = sysc_reinit_module(ddata, ddata->needs_resume); > 1396 if (error) > 1397 dev_warn(dev, "noirq_resume failed: %i\n", error); > > 1398 } else if (ddata->needs_resume) { > 1399 error = sysc_runtime_resume(dev); > 1400 if (error) > 1401 dev_warn(dev, "noirq_resume failed: %i\n", error); > 1402 } > 1403 > 1404 ddata->needs_resume = 0; > 1405 > 1406 return error; > 1407 } > 1408 Thanks for the report, I'll update the patch to init error = 0 here. Regards, Tony
