Hi Bhaumik, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on linus/master] [also build test WARNING on v5.11 next-20210219] [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/Bhaumik-Bhatt/Serialize-execution-environment-changes-for-MHI/20210220-071426 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git f40ddce88593482919761f74910f42f4b84c004b config: mips-randconfig-r033-20210219 (attached as .config) compiler: mipsel-linux-gcc (GCC) 9.3.0 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 # https://github.com/0day-ci/linux/commit/e38872b38ede9c5c1706cd11bf5792f8dc436fcf git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Bhaumik-Bhatt/Serialize-execution-environment-changes-for-MHI/20210220-071426 git checkout e38872b38ede9c5c1706cd11bf5792f8dc436fcf # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=mips 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/mhi/core/main.c: In function 'mhi_intvec_threaded_handler': >> drivers/bus/mhi/core/main.c:436:17: warning: this statement may fall through [-Wimplicit-fallthrough=] 436 | mhi_cntrl->ee = ee; | ~~~~~~~~~~~~~~^~~~ drivers/bus/mhi/core/main.c:438:2: note: here 438 | default: | ^~~~~~~ vim +436 drivers/bus/mhi/core/main.c 392 393 irqreturn_t mhi_intvec_threaded_handler(int irq_number, void *priv) 394 { 395 struct mhi_controller *mhi_cntrl = priv; 396 struct device *dev = &mhi_cntrl->mhi_dev->dev; 397 enum mhi_state state = MHI_STATE_MAX; 398 enum mhi_pm_state pm_state = 0; 399 enum mhi_ee_type ee = MHI_EE_MAX; 400 401 write_lock_irq(&mhi_cntrl->pm_lock); 402 if (!MHI_REG_ACCESS_VALID(mhi_cntrl->pm_state)) { 403 write_unlock_irq(&mhi_cntrl->pm_lock); 404 goto exit_intvec; 405 } 406 407 state = mhi_get_mhi_state(mhi_cntrl); 408 ee = mhi_get_exec_env(mhi_cntrl); 409 dev_dbg(dev, "local ee:%s device ee:%s dev_state:%s\n", 410 TO_MHI_EXEC_STR(mhi_cntrl->ee), TO_MHI_EXEC_STR(ee), 411 TO_MHI_STATE_STR(state)); 412 413 if (state == MHI_STATE_SYS_ERR) { 414 dev_dbg(dev, "System error detected\n"); 415 pm_state = mhi_tryset_pm_state(mhi_cntrl, 416 MHI_PM_SYS_ERR_DETECT); 417 } 418 write_unlock_irq(&mhi_cntrl->pm_lock); 419 420 if (pm_state != MHI_PM_SYS_ERR_DETECT || ee == mhi_cntrl->ee) 421 goto exit_intvec; 422 423 switch (ee) { 424 case MHI_EE_RDDM: 425 /* proceed if power down is not already in progress */ 426 if (mhi_cntrl->rddm_image && mhi_is_active(mhi_cntrl)) { 427 mhi_cntrl->status_cb(mhi_cntrl, MHI_CB_EE_RDDM); 428 mhi_cntrl->ee = ee; 429 wake_up_all(&mhi_cntrl->state_event); 430 } 431 break; 432 case MHI_EE_PBL: 433 case MHI_EE_EDL: 434 case MHI_EE_PTHRU: 435 mhi_cntrl->status_cb(mhi_cntrl, MHI_CB_FATAL_ERROR); > 436 mhi_cntrl->ee = ee; 437 /* continue */ 438 default: 439 mhi_pm_sys_err_handler(mhi_cntrl); 440 wake_up_all(&mhi_cntrl->state_event); 441 break; 442 } 443 444 exit_intvec: 445 446 return IRQ_HANDLED; 447 } 448 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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