Hi "Uwe, I love your patch! Perhaps something to improve: [auto build test WARNING on tty/tty-testing] [also build test WARNING on next-20210218] [cannot apply to pavel-linux-leds/for-next staging/staging-testing v5.11] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Uwe-Kleine-K-nig/leds-trigger-Fix-error-path-to-not-unlock-the-unlocked-mutex/20210219-163217 base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing config: powerpc-randconfig-r032-20210219 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c9439ca36342fb6013187d0a69aef92736951476) 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 powerpc cross compiling tool for clang build # apt-get install binutils-powerpc-linux-gnu # https://github.com/0day-ci/linux/commit/f13a575b98965827ab968d1c88d98c6b044d4492 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Uwe-Kleine-K-nig/leds-trigger-Fix-error-path-to-not-unlock-the-unlocked-mutex/20210219-163217 git checkout f13a575b98965827ab968d1c88d98c6b044d4492 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc 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/leds/trigger/ledtrig-tty.c:70:1: warning: unused label 'out_unlock' [-Wunused-label] out_unlock: ^~~~~~~~~~~ 1 warning generated. vim +/out_unlock +70 drivers/leds/trigger/ledtrig-tty.c fd4a641ac88fbb Uwe Kleine-König 2021-01-13 39 fd4a641ac88fbb Uwe Kleine-König 2021-01-13 40 static ssize_t ttyname_store(struct device *dev, fd4a641ac88fbb Uwe Kleine-König 2021-01-13 41 struct device_attribute *attr, const char *buf, fd4a641ac88fbb Uwe Kleine-König 2021-01-13 42 size_t size) fd4a641ac88fbb Uwe Kleine-König 2021-01-13 43 { fd4a641ac88fbb Uwe Kleine-König 2021-01-13 44 struct ledtrig_tty_data *trigger_data = led_trigger_get_drvdata(dev); fd4a641ac88fbb Uwe Kleine-König 2021-01-13 45 char *ttyname; fd4a641ac88fbb Uwe Kleine-König 2021-01-13 46 ssize_t ret = size; fd4a641ac88fbb Uwe Kleine-König 2021-01-13 47 bool running; fd4a641ac88fbb Uwe Kleine-König 2021-01-13 48 fd4a641ac88fbb Uwe Kleine-König 2021-01-13 49 if (size > 0 && buf[size - 1] == '\n') fd4a641ac88fbb Uwe Kleine-König 2021-01-13 50 size -= 1; fd4a641ac88fbb Uwe Kleine-König 2021-01-13 51 fd4a641ac88fbb Uwe Kleine-König 2021-01-13 52 if (size) { fd4a641ac88fbb Uwe Kleine-König 2021-01-13 53 ttyname = kmemdup_nul(buf, size, GFP_KERNEL); f13a575b989658 Uwe Kleine-König 2021-02-19 54 if (!ttyname) f13a575b989658 Uwe Kleine-König 2021-02-19 55 return -ENOMEM; fd4a641ac88fbb Uwe Kleine-König 2021-01-13 56 } else { fd4a641ac88fbb Uwe Kleine-König 2021-01-13 57 ttyname = NULL; fd4a641ac88fbb Uwe Kleine-König 2021-01-13 58 } fd4a641ac88fbb Uwe Kleine-König 2021-01-13 59 fd4a641ac88fbb Uwe Kleine-König 2021-01-13 60 mutex_lock(&trigger_data->mutex); fd4a641ac88fbb Uwe Kleine-König 2021-01-13 61 fd4a641ac88fbb Uwe Kleine-König 2021-01-13 62 running = trigger_data->ttyname != NULL; fd4a641ac88fbb Uwe Kleine-König 2021-01-13 63 fd4a641ac88fbb Uwe Kleine-König 2021-01-13 64 kfree(trigger_data->ttyname); fd4a641ac88fbb Uwe Kleine-König 2021-01-13 65 tty_kref_put(trigger_data->tty); fd4a641ac88fbb Uwe Kleine-König 2021-01-13 66 trigger_data->tty = NULL; fd4a641ac88fbb Uwe Kleine-König 2021-01-13 67 fd4a641ac88fbb Uwe Kleine-König 2021-01-13 68 trigger_data->ttyname = ttyname; fd4a641ac88fbb Uwe Kleine-König 2021-01-13 69 fd4a641ac88fbb Uwe Kleine-König 2021-01-13 @70 out_unlock: fd4a641ac88fbb Uwe Kleine-König 2021-01-13 71 mutex_unlock(&trigger_data->mutex); fd4a641ac88fbb Uwe Kleine-König 2021-01-13 72 fd4a641ac88fbb Uwe Kleine-König 2021-01-13 73 if (ttyname && !running) fd4a641ac88fbb Uwe Kleine-König 2021-01-13 74 ledtrig_tty_restart(trigger_data); fd4a641ac88fbb Uwe Kleine-König 2021-01-13 75 fd4a641ac88fbb Uwe Kleine-König 2021-01-13 76 return ret; fd4a641ac88fbb Uwe Kleine-König 2021-01-13 77 } fd4a641ac88fbb Uwe Kleine-König 2021-01-13 78 static DEVICE_ATTR_RW(ttyname); fd4a641ac88fbb Uwe Kleine-König 2021-01-13 79 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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