Hi Chetan, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: cb690f5238d71f543f4ce874aa59237cf53a877c commit: 8d9be06341816e5fb7e29b2fd44b3ffe8dd3263a net: wwan: iosm: transport layer support for fw flashing/cd date: 7 weeks ago config: x86_64-allyesconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 8d9be06341816e5fb7e29b2fd44b3ffe8dd3263a # save the attached .config to linux build tree make W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): drivers/net/wwan/iosm/iosm_ipc_imem_ops.c: In function 'ipc_imem_sys_devlink_close': 397 | enum ipc_phase curr_phase; | ^~~~~~~~~~ cc1: all warnings being treated as errors vim +/curr_phase +397 drivers/net/wwan/iosm/iosm_ipc_imem_ops.c 389 390 /* Release a SIO channel link to CP. */ 391 void ipc_imem_sys_devlink_close(struct iosm_devlink *ipc_devlink) 392 { 393 struct iosm_imem *ipc_imem = ipc_devlink->pcie->imem; 394 int boot_check_timeout = BOOT_CHECK_DEFAULT_TIMEOUT; 395 enum ipc_mem_exec_stage exec_stage; 396 struct ipc_mem_channel *channel; 398 int status = 0; 399 u32 tail = 0; 400 401 channel = ipc_imem->ipc_devlink->devlink_sio.channel; 402 curr_phase = ipc_imem->phase; 403 /* Increase the total wait time to boot_check_timeout */ 404 do { 405 exec_stage = ipc_mmio_get_exec_stage(ipc_imem->mmio); 406 if (exec_stage == IPC_MEM_EXEC_STAGE_RUN || 407 exec_stage == IPC_MEM_EXEC_STAGE_PSI) 408 break; 409 msleep(20); 410 boot_check_timeout -= 20; 411 } while (boot_check_timeout > 0); 412 413 /* If there are any pending TDs then wait for Timeout/Completion before 414 * closing pipe. 415 */ 416 if (channel->ul_pipe.old_tail != channel->ul_pipe.old_head) { 417 status = wait_for_completion_interruptible_timeout 418 (&ipc_imem->ul_pend_sem, 419 msecs_to_jiffies(IPC_PEND_DATA_TIMEOUT)); 420 if (status == 0) { 421 dev_dbg(ipc_imem->dev, 422 "Data Timeout on UL-Pipe:%d Head:%d Tail:%d", 423 channel->ul_pipe.pipe_nr, 424 channel->ul_pipe.old_head, 425 channel->ul_pipe.old_tail); 426 } 427 } 428 429 ipc_protocol_get_head_tail_index(ipc_imem->ipc_protocol, 430 &channel->dl_pipe, NULL, &tail); 431 432 if (tail != channel->dl_pipe.old_tail) { 433 status = wait_for_completion_interruptible_timeout 434 (&ipc_imem->dl_pend_sem, 435 msecs_to_jiffies(IPC_PEND_DATA_TIMEOUT)); 436 if (status == 0) { 437 dev_dbg(ipc_imem->dev, 438 "Data Timeout on DL-Pipe:%d Head:%d Tail:%d", 439 channel->dl_pipe.pipe_nr, 440 channel->dl_pipe.old_head, 441 channel->dl_pipe.old_tail); 442 } 443 } 444 445 /* Due to wait for completion in messages, there is a small window 446 * between closing the pipe and updating the channel is closed. In this 447 * small window there could be HP update from Host Driver. Hence update 448 * the channel state as CLOSING to aviod unnecessary interrupt 449 * towards CP. 450 */ 451 channel->state = IMEM_CHANNEL_CLOSING; 452 /* Release the pipe resources */ 453 ipc_imem_pipe_cleanup(ipc_imem, &channel->ul_pipe); 454 ipc_imem_pipe_cleanup(ipc_imem, &channel->dl_pipe); 455 } 456 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org