tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 00e4db51259a5f936fec1424b884f029479d3981 commit: f0325e38ab39c2e270770b72c79795772ac3b49e wlcore: Use spin_trylock in wlcore_irq_locked() for running the queue date: 4 weeks ago config: mips-randconfig-s032-20200811 (attached as .config) compiler: mips64-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.2-168-g9554805c-dirty git checkout f0325e38ab39c2e270770b72c79795772ac3b49e # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=mips If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) vim +/wlcore_irq_locked +643 drivers/net/wireless/ti/wlcore/main.c 1e73eb62cec7cf drivers/net/wireless/wl12xx/wl1271_main.c Juuso Oikarinen 2010-02-22 518 b5b45b3cbd5616 drivers/net/wireless/ti/wlcore/main.c Arik Nemtsov 2012-06-21 519 static int wlcore_irq_locked(struct wl1271 *wl) f5fc0f86b02afe drivers/net/wireless/wl12xx/wl1271_main.c Luciano Coelho 2009-08-06 520 { b5b45b3cbd5616 drivers/net/wireless/ti/wlcore/main.c Arik Nemtsov 2012-06-21 521 int ret = 0; c15f63bffabb99 drivers/net/wireless/wl12xx/wl1271_main.c Juuso Oikarinen 2009-10-12 522 u32 intr; 1e73eb62cec7cf drivers/net/wireless/wl12xx/wl1271_main.c Juuso Oikarinen 2010-02-22 523 int loopcount = WL1271_IRQ_MAX_LOOPS; f0325e38ab39c2 drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2020-07-02 524 bool run_tx_queue = true; a620865edf62ea drivers/net/wireless/wl12xx/main.c Ido Yariv 2011-03-01 525 bool done = false; a620865edf62ea drivers/net/wireless/wl12xx/main.c Ido Yariv 2011-03-01 526 unsigned int defer_count; b07d4037051318 drivers/net/wireless/wl12xx/main.c Ido Yariv 2011-03-01 527 unsigned long flags; b07d4037051318 drivers/net/wireless/wl12xx/main.c Ido Yariv 2011-03-01 528 341b7cde6ccc60 drivers/net/wireless/wl12xx/main.c Ido Yariv 2011-03-31 529 /* 341b7cde6ccc60 drivers/net/wireless/wl12xx/main.c Ido Yariv 2011-03-31 530 * In case edge triggered interrupt must be used, we cannot iterate 341b7cde6ccc60 drivers/net/wireless/wl12xx/main.c Ido Yariv 2011-03-31 531 * more than once without introducing race conditions with the hardirq. 341b7cde6ccc60 drivers/net/wireless/wl12xx/main.c Ido Yariv 2011-03-31 532 */ 6f921fab584494 drivers/net/wireless/ti/wlcore/main.c Luciano Coelho 2015-03-18 533 if (wl->irq_flags & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)) 341b7cde6ccc60 drivers/net/wireless/wl12xx/main.c Ido Yariv 2011-03-31 534 loopcount = 1; 341b7cde6ccc60 drivers/net/wireless/wl12xx/main.c Ido Yariv 2011-03-31 535 f5fc0f86b02afe drivers/net/wireless/wl12xx/wl1271_main.c Luciano Coelho 2009-08-06 536 wl1271_debug(DEBUG_IRQ, "IRQ work"); f5fc0f86b02afe drivers/net/wireless/wl12xx/wl1271_main.c Luciano Coelho 2009-08-06 537 4cc533830b7e6b drivers/net/wireless/ti/wlcore/main.c Ido Yariv 2012-07-24 538 if (unlikely(wl->state != WLCORE_STATE_ON)) f5fc0f86b02afe drivers/net/wireless/wl12xx/wl1271_main.c Luciano Coelho 2009-08-06 539 goto out; f5fc0f86b02afe drivers/net/wireless/wl12xx/wl1271_main.c Luciano Coelho 2009-08-06 540 fa2648a34e73fb drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2018-06-19 541 ret = pm_runtime_get_sync(wl->dev); fa2648a34e73fb drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2018-06-19 542 if (ret < 0) { fa2648a34e73fb drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2018-06-19 543 pm_runtime_put_noidle(wl->dev); f5fc0f86b02afe drivers/net/wireless/wl12xx/wl1271_main.c Luciano Coelho 2009-08-06 544 goto out; fa2648a34e73fb drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2018-06-19 545 } f5fc0f86b02afe drivers/net/wireless/wl12xx/wl1271_main.c Luciano Coelho 2009-08-06 546 a620865edf62ea drivers/net/wireless/wl12xx/main.c Ido Yariv 2011-03-01 547 while (!done && loopcount--) { 4e857c58efeb99 drivers/net/wireless/ti/wlcore/main.c Peter Zijlstra 2014-03-17 548 smp_mb__after_atomic(); 1e73eb62cec7cf drivers/net/wireless/wl12xx/wl1271_main.c Juuso Oikarinen 2010-02-22 549 75fb4df7f80422 drivers/net/wireless/ti/wlcore/main.c Eliad Peller 2014-02-10 550 ret = wlcore_fw_status(wl, wl->fw_status); b5b45b3cbd5616 drivers/net/wireless/ti/wlcore/main.c Arik Nemtsov 2012-06-21 551 if (ret < 0) da74b6933b3ba2 drivers/net/wireless/ti/wlcore/main.c Dinghao Liu 2020-05-22 552 goto err_ret; 53d67a50cd17ac drivers/net/wireless/ti/wlcore/main.c Arik Nemtsov 2011-12-12 553 53d67a50cd17ac drivers/net/wireless/ti/wlcore/main.c Arik Nemtsov 2011-12-12 554 wlcore_hw_tx_immediate_compl(wl); 53d67a50cd17ac drivers/net/wireless/ti/wlcore/main.c Arik Nemtsov 2011-12-12 555 75fb4df7f80422 drivers/net/wireless/ti/wlcore/main.c Eliad Peller 2014-02-10 556 intr = wl->fw_status->intr; f5755fe96cb010 drivers/net/wireless/ti/wlcore/main.c Ido Reis 2012-04-23 557 intr &= WLCORE_ALL_INTR_MASK; f5fc0f86b02afe drivers/net/wireless/wl12xx/wl1271_main.c Luciano Coelho 2009-08-06 558 if (!intr) { a620865edf62ea drivers/net/wireless/wl12xx/main.c Ido Yariv 2011-03-01 559 done = true; 1e73eb62cec7cf drivers/net/wireless/wl12xx/wl1271_main.c Juuso Oikarinen 2010-02-22 560 continue; f5fc0f86b02afe drivers/net/wireless/wl12xx/wl1271_main.c Luciano Coelho 2009-08-06 561 } f5fc0f86b02afe drivers/net/wireless/wl12xx/wl1271_main.c Luciano Coelho 2009-08-06 562 ccc83b046c0337 drivers/net/wireless/wl12xx/wl1271_main.c Eliad Peller 2010-10-27 563 if (unlikely(intr & WL1271_ACX_INTR_WATCHDOG)) { f5755fe96cb010 drivers/net/wireless/ti/wlcore/main.c Ido Reis 2012-04-23 564 wl1271_error("HW watchdog interrupt received! starting recovery."); f5755fe96cb010 drivers/net/wireless/ti/wlcore/main.c Ido Reis 2012-04-23 565 wl->watchdog_recovery = true; b5b45b3cbd5616 drivers/net/wireless/ti/wlcore/main.c Arik Nemtsov 2012-06-21 566 ret = -EIO; f5755fe96cb010 drivers/net/wireless/ti/wlcore/main.c Ido Reis 2012-04-23 567 f5755fe96cb010 drivers/net/wireless/ti/wlcore/main.c Ido Reis 2012-04-23 568 /* restarting the chip. ignore any other interrupt. */ da74b6933b3ba2 drivers/net/wireless/ti/wlcore/main.c Dinghao Liu 2020-05-22 569 goto err_ret; f5755fe96cb010 drivers/net/wireless/ti/wlcore/main.c Ido Reis 2012-04-23 570 } f5755fe96cb010 drivers/net/wireless/ti/wlcore/main.c Ido Reis 2012-04-23 571 f5755fe96cb010 drivers/net/wireless/ti/wlcore/main.c Ido Reis 2012-04-23 572 if (unlikely(intr & WL1271_ACX_SW_INTR_WATCHDOG)) { f5755fe96cb010 drivers/net/wireless/ti/wlcore/main.c Ido Reis 2012-04-23 573 wl1271_error("SW watchdog interrupt received! " ccc83b046c0337 drivers/net/wireless/wl12xx/wl1271_main.c Eliad Peller 2010-10-27 574 "starting recovery."); afbe37185c0eca drivers/net/wireless/ti/wlcore/main.c Yoni Divinsky 2012-05-16 575 wl->watchdog_recovery = true; b5b45b3cbd5616 drivers/net/wireless/ti/wlcore/main.c Arik Nemtsov 2012-06-21 576 ret = -EIO; ccc83b046c0337 drivers/net/wireless/wl12xx/wl1271_main.c Eliad Peller 2010-10-27 577 ccc83b046c0337 drivers/net/wireless/wl12xx/wl1271_main.c Eliad Peller 2010-10-27 578 /* restarting the chip. ignore any other interrupt. */ da74b6933b3ba2 drivers/net/wireless/ti/wlcore/main.c Dinghao Liu 2020-05-22 579 goto err_ret; ccc83b046c0337 drivers/net/wireless/wl12xx/wl1271_main.c Eliad Peller 2010-10-27 580 } ccc83b046c0337 drivers/net/wireless/wl12xx/wl1271_main.c Eliad Peller 2010-10-27 581 a620865edf62ea drivers/net/wireless/wl12xx/main.c Ido Yariv 2011-03-01 582 if (likely(intr & WL1271_ACX_INTR_DATA)) { 1e73eb62cec7cf drivers/net/wireless/wl12xx/wl1271_main.c Juuso Oikarinen 2010-02-22 583 wl1271_debug(DEBUG_IRQ, "WL1271_ACX_INTR_DATA"); 1e73eb62cec7cf drivers/net/wireless/wl12xx/wl1271_main.c Juuso Oikarinen 2010-02-22 584 75fb4df7f80422 drivers/net/wireless/ti/wlcore/main.c Eliad Peller 2014-02-10 585 ret = wlcore_rx(wl, wl->fw_status); b5b45b3cbd5616 drivers/net/wireless/ti/wlcore/main.c Arik Nemtsov 2012-06-21 586 if (ret < 0) da74b6933b3ba2 drivers/net/wireless/ti/wlcore/main.c Dinghao Liu 2020-05-22 587 goto err_ret; 1e73eb62cec7cf drivers/net/wireless/wl12xx/wl1271_main.c Juuso Oikarinen 2010-02-22 588 a522550a283de3 drivers/net/wireless/wl12xx/wl1271_main.c Ido Yariv 2010-10-12 589 /* Check if any tx blocks were freed */ f0325e38ab39c2 drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2020-07-02 590 if (!test_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags)) { f0325e38ab39c2 drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2020-07-02 591 if (spin_trylock_irqsave(&wl->wl_lock, flags)) { f0325e38ab39c2 drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2020-07-02 592 if (!wl1271_tx_total_queue_count(wl)) f0325e38ab39c2 drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2020-07-02 593 run_tx_queue = false; b07d4037051318 drivers/net/wireless/wl12xx/main.c Ido Yariv 2011-03-01 594 spin_unlock_irqrestore(&wl->wl_lock, flags); f0325e38ab39c2 drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2020-07-02 595 } f0325e38ab39c2 drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2020-07-02 596 a522550a283de3 drivers/net/wireless/wl12xx/wl1271_main.c Ido Yariv 2010-10-12 597 /* a522550a283de3 drivers/net/wireless/wl12xx/wl1271_main.c Ido Yariv 2010-10-12 598 * In order to avoid starvation of the TX path, a522550a283de3 drivers/net/wireless/wl12xx/wl1271_main.c Ido Yariv 2010-10-12 599 * call the work function directly. a522550a283de3 drivers/net/wireless/wl12xx/wl1271_main.c Ido Yariv 2010-10-12 600 */ f0325e38ab39c2 drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2020-07-02 601 if (run_tx_queue) { eb96f841b9563b drivers/net/wireless/ti/wlcore/main.c Ido Yariv 2012-06-18 602 ret = wlcore_tx_work_locked(wl); b5b45b3cbd5616 drivers/net/wireless/ti/wlcore/main.c Arik Nemtsov 2012-06-21 603 if (ret < 0) da74b6933b3ba2 drivers/net/wireless/ti/wlcore/main.c Dinghao Liu 2020-05-22 604 goto err_ret; f0325e38ab39c2 drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2020-07-02 605 } a522550a283de3 drivers/net/wireless/wl12xx/wl1271_main.c Ido Yariv 2010-10-12 606 } a522550a283de3 drivers/net/wireless/wl12xx/wl1271_main.c Ido Yariv 2010-10-12 607 8aad24642a7c06 drivers/net/wireless/wl12xx/main.c Ido Yariv 2011-03-01 608 /* check for tx results */ 045b9b5f4172b2 drivers/net/wireless/ti/wlcore/main.c Ido Yariv 2012-06-18 609 ret = wlcore_hw_tx_delayed_compl(wl); b5b45b3cbd5616 drivers/net/wireless/ti/wlcore/main.c Arik Nemtsov 2012-06-21 610 if (ret < 0) da74b6933b3ba2 drivers/net/wireless/ti/wlcore/main.c Dinghao Liu 2020-05-22 611 goto err_ret; a620865edf62ea drivers/net/wireless/wl12xx/main.c Ido Yariv 2011-03-01 612 a620865edf62ea drivers/net/wireless/wl12xx/main.c Ido Yariv 2011-03-01 613 /* Make sure the deferred queues don't get too long */ a620865edf62ea drivers/net/wireless/wl12xx/main.c Ido Yariv 2011-03-01 614 defer_count = skb_queue_len(&wl->deferred_tx_queue) + a620865edf62ea drivers/net/wireless/wl12xx/main.c Ido Yariv 2011-03-01 615 skb_queue_len(&wl->deferred_rx_queue); a620865edf62ea drivers/net/wireless/wl12xx/main.c Ido Yariv 2011-03-01 616 if (defer_count > WL1271_DEFERRED_QUEUE_LIMIT) a620865edf62ea drivers/net/wireless/wl12xx/main.c Ido Yariv 2011-03-01 617 wl1271_flush_deferred_work(wl); 1e73eb62cec7cf drivers/net/wireless/wl12xx/wl1271_main.c Juuso Oikarinen 2010-02-22 618 } 1e73eb62cec7cf drivers/net/wireless/wl12xx/wl1271_main.c Juuso Oikarinen 2010-02-22 619 1fd2794f369139 drivers/net/wireless/wl12xx/wl1271_main.c Juuso Oikarinen 2009-10-13 620 if (intr & WL1271_ACX_INTR_EVENT_A) { 1fd2794f369139 drivers/net/wireless/wl12xx/wl1271_main.c Juuso Oikarinen 2009-10-13 621 wl1271_debug(DEBUG_IRQ, "WL1271_ACX_INTR_EVENT_A"); 045b9b5f4172b2 drivers/net/wireless/ti/wlcore/main.c Ido Yariv 2012-06-18 622 ret = wl1271_event_handle(wl, 0); b5b45b3cbd5616 drivers/net/wireless/ti/wlcore/main.c Arik Nemtsov 2012-06-21 623 if (ret < 0) da74b6933b3ba2 drivers/net/wireless/ti/wlcore/main.c Dinghao Liu 2020-05-22 624 goto err_ret; 1fd2794f369139 drivers/net/wireless/wl12xx/wl1271_main.c Juuso Oikarinen 2009-10-13 625 } 1fd2794f369139 drivers/net/wireless/wl12xx/wl1271_main.c Juuso Oikarinen 2009-10-13 626 1fd2794f369139 drivers/net/wireless/wl12xx/wl1271_main.c Juuso Oikarinen 2009-10-13 627 if (intr & WL1271_ACX_INTR_EVENT_B) { 1fd2794f369139 drivers/net/wireless/wl12xx/wl1271_main.c Juuso Oikarinen 2009-10-13 628 wl1271_debug(DEBUG_IRQ, "WL1271_ACX_INTR_EVENT_B"); 045b9b5f4172b2 drivers/net/wireless/ti/wlcore/main.c Ido Yariv 2012-06-18 629 ret = wl1271_event_handle(wl, 1); b5b45b3cbd5616 drivers/net/wireless/ti/wlcore/main.c Arik Nemtsov 2012-06-21 630 if (ret < 0) da74b6933b3ba2 drivers/net/wireless/ti/wlcore/main.c Dinghao Liu 2020-05-22 631 goto err_ret; f5fc0f86b02afe drivers/net/wireless/wl12xx/wl1271_main.c Luciano Coelho 2009-08-06 632 } f5fc0f86b02afe drivers/net/wireless/wl12xx/wl1271_main.c Luciano Coelho 2009-08-06 633 f5fc0f86b02afe drivers/net/wireless/wl12xx/wl1271_main.c Luciano Coelho 2009-08-06 634 if (intr & WL1271_ACX_INTR_INIT_COMPLETE) f5fc0f86b02afe drivers/net/wireless/wl12xx/wl1271_main.c Luciano Coelho 2009-08-06 635 wl1271_debug(DEBUG_IRQ, f5fc0f86b02afe drivers/net/wireless/wl12xx/wl1271_main.c Luciano Coelho 2009-08-06 636 "WL1271_ACX_INTR_INIT_COMPLETE"); f5fc0f86b02afe drivers/net/wireless/wl12xx/wl1271_main.c Luciano Coelho 2009-08-06 637 f5fc0f86b02afe drivers/net/wireless/wl12xx/wl1271_main.c Luciano Coelho 2009-08-06 638 if (intr & WL1271_ACX_INTR_HW_AVAILABLE) f5fc0f86b02afe drivers/net/wireless/wl12xx/wl1271_main.c Luciano Coelho 2009-08-06 639 wl1271_debug(DEBUG_IRQ, "WL1271_ACX_INTR_HW_AVAILABLE"); f5fc0f86b02afe drivers/net/wireless/wl12xx/wl1271_main.c Luciano Coelho 2009-08-06 640 } f5fc0f86b02afe drivers/net/wireless/wl12xx/wl1271_main.c Luciano Coelho 2009-08-06 641 da74b6933b3ba2 drivers/net/wireless/ti/wlcore/main.c Dinghao Liu 2020-05-22 642 err_ret: 9b71578de08748 drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2018-06-19 @643 pm_runtime_mark_last_busy(wl->dev); 9b71578de08748 drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2018-06-19 644 pm_runtime_put_autosuspend(wl->dev); f5fc0f86b02afe drivers/net/wireless/wl12xx/wl1271_main.c Luciano Coelho 2009-08-06 645 f5fc0f86b02afe drivers/net/wireless/wl12xx/wl1271_main.c Luciano Coelho 2009-08-06 646 out: b5b45b3cbd5616 drivers/net/wireless/ti/wlcore/main.c Arik Nemtsov 2012-06-21 647 return ret; b5b45b3cbd5616 drivers/net/wireless/ti/wlcore/main.c Arik Nemtsov 2012-06-21 648 } b5b45b3cbd5616 drivers/net/wireless/ti/wlcore/main.c Arik Nemtsov 2012-06-21 649 :::::: The code at line 643 was first introduced by commit :::::: 9b71578de08748defb3bcae3ce8ed1a75cb6a8d7 wlcore: Enable runtime PM autosuspend support :::::: TO: Tony Lindgren <tony(a)atomide.com&gt; :::::: CC: Kalle Valo <kvalo(a)codeaurora.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org