drivers/net/wireless/ti/wlcore/main.c:700:9: sparse: sparse: context imbalance in 'wlcore_irq' - different lock contexts for basic block

From: kernel test robot
Date: Tue Aug 11 2020 - 08:24:32 EST

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tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 00e4db51259a5f936fec1424b884f029479d3981
commit: 35fba0f0fd762a8b87d403ae3c723e0061c4aa25 wlcore: Use spin_trylock in wlcore_irq() to see if we need to queue tx
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 35fba0f0fd762a8b87d403ae3c723e0061c4aa25
# 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@xxxxxxxxx>

sparse warnings: (new ones prefixed by >>)

drivers/net/wireless/ti/wlcore/main.c:643:34: sparse: sparse: context imbalance in 'wlcore_irq_locked' - different lock contexts for basic block
>> drivers/net/wireless/ti/wlcore/main.c:700:9: sparse: sparse: context imbalance in 'wlcore_irq' - different lock contexts for basic block

vim +/wlcore_irq +700 drivers/net/wireless/ti/wlcore/main.c

b5b45b3cbd5616 drivers/net/wireless/ti/wlcore/main.c Arik Nemtsov 2012-06-21 649
b5b45b3cbd5616 drivers/net/wireless/ti/wlcore/main.c Arik Nemtsov 2012-06-21 650 static irqreturn_t wlcore_irq(int irq, void *cookie)
b5b45b3cbd5616 drivers/net/wireless/ti/wlcore/main.c Arik Nemtsov 2012-06-21 651 {
b5b45b3cbd5616 drivers/net/wireless/ti/wlcore/main.c Arik Nemtsov 2012-06-21 652 int ret;
b5b45b3cbd5616 drivers/net/wireless/ti/wlcore/main.c Arik Nemtsov 2012-06-21 653 unsigned long flags;
b5b45b3cbd5616 drivers/net/wireless/ti/wlcore/main.c Arik Nemtsov 2012-06-21 654 struct wl1271 *wl = cookie;
35fba0f0fd762a drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2020-07-02 655 bool queue_tx_work = true;
b5b45b3cbd5616 drivers/net/wireless/ti/wlcore/main.c Arik Nemtsov 2012-06-21 656
eb215c33f308ce drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2020-07-02 657 set_bit(WL1271_FLAG_IRQ_RUNNING, &wl->flags);
eb215c33f308ce drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2020-07-02 658
97236a0656034e drivers/net/wireless/ti/wlcore/main.c Luciano Coelho 2013-03-08 659 /* complete the ELP completion */
eb215c33f308ce drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2020-07-02 660 if (test_bit(WL1271_FLAG_IN_ELP, &wl->flags)) {
97236a0656034e drivers/net/wireless/ti/wlcore/main.c Luciano Coelho 2013-03-08 661 spin_lock_irqsave(&wl->wl_lock, flags);
eb215c33f308ce drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2020-07-02 662 if (wl->elp_compl)
97236a0656034e drivers/net/wireless/ti/wlcore/main.c Luciano Coelho 2013-03-08 663 complete(wl->elp_compl);
eb215c33f308ce drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2020-07-02 664 spin_unlock_irqrestore(&wl->wl_lock, flags);
97236a0656034e drivers/net/wireless/ti/wlcore/main.c Luciano Coelho 2013-03-08 665 }
97236a0656034e drivers/net/wireless/ti/wlcore/main.c Luciano Coelho 2013-03-08 666
97236a0656034e drivers/net/wireless/ti/wlcore/main.c Luciano Coelho 2013-03-08 667 if (test_bit(WL1271_FLAG_SUSPENDED, &wl->flags)) {
97236a0656034e drivers/net/wireless/ti/wlcore/main.c Luciano Coelho 2013-03-08 668 /* don't enqueue a work right now. mark it as pending */
97236a0656034e drivers/net/wireless/ti/wlcore/main.c Luciano Coelho 2013-03-08 669 set_bit(WL1271_FLAG_PENDING_WORK, &wl->flags);
97236a0656034e drivers/net/wireless/ti/wlcore/main.c Luciano Coelho 2013-03-08 670 wl1271_debug(DEBUG_IRQ, "should not enqueue work");
eb215c33f308ce drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2020-07-02 671 spin_lock_irqsave(&wl->wl_lock, flags);
97236a0656034e drivers/net/wireless/ti/wlcore/main.c Luciano Coelho 2013-03-08 672 disable_irq_nosync(wl->irq);
97236a0656034e drivers/net/wireless/ti/wlcore/main.c Luciano Coelho 2013-03-08 673 pm_wakeup_event(wl->dev, 0);
97236a0656034e drivers/net/wireless/ti/wlcore/main.c Luciano Coelho 2013-03-08 674 spin_unlock_irqrestore(&wl->wl_lock, flags);
4633d30b61ac14 drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2019-10-09 675 goto out_handled;
97236a0656034e drivers/net/wireless/ti/wlcore/main.c Luciano Coelho 2013-03-08 676 }
97236a0656034e drivers/net/wireless/ti/wlcore/main.c Luciano Coelho 2013-03-08 677
b5b45b3cbd5616 drivers/net/wireless/ti/wlcore/main.c Arik Nemtsov 2012-06-21 678 /* TX might be handled here, avoid redundant work */
b5b45b3cbd5616 drivers/net/wireless/ti/wlcore/main.c Arik Nemtsov 2012-06-21 679 set_bit(WL1271_FLAG_TX_PENDING, &wl->flags);
b5b45b3cbd5616 drivers/net/wireless/ti/wlcore/main.c Arik Nemtsov 2012-06-21 680 cancel_work_sync(&wl->tx_work);
b5b45b3cbd5616 drivers/net/wireless/ti/wlcore/main.c Arik Nemtsov 2012-06-21 681
b5b45b3cbd5616 drivers/net/wireless/ti/wlcore/main.c Arik Nemtsov 2012-06-21 682 mutex_lock(&wl->mutex);
b5b45b3cbd5616 drivers/net/wireless/ti/wlcore/main.c Arik Nemtsov 2012-06-21 683
b5b45b3cbd5616 drivers/net/wireless/ti/wlcore/main.c Arik Nemtsov 2012-06-21 684 ret = wlcore_irq_locked(wl);
b5b45b3cbd5616 drivers/net/wireless/ti/wlcore/main.c Arik Nemtsov 2012-06-21 685 if (ret)
b5b45b3cbd5616 drivers/net/wireless/ti/wlcore/main.c Arik Nemtsov 2012-06-21 686 wl12xx_queue_recovery_work(wl);
b5b45b3cbd5616 drivers/net/wireless/ti/wlcore/main.c Arik Nemtsov 2012-06-21 687
35fba0f0fd762a drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2020-07-02 688 /* In case TX was not handled in wlcore_irq_locked(), queue TX work */
b07d4037051318 drivers/net/wireless/wl12xx/main.c Ido Yariv 2011-03-01 689 clear_bit(WL1271_FLAG_TX_PENDING, &wl->flags);
35fba0f0fd762a drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2020-07-02 690 if (!test_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags)) {
35fba0f0fd762a drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2020-07-02 691 if (spin_trylock_irqsave(&wl->wl_lock, flags)) {
35fba0f0fd762a drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2020-07-02 692 if (!wl1271_tx_total_queue_count(wl))
35fba0f0fd762a drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2020-07-02 693 queue_tx_work = false;
b07d4037051318 drivers/net/wireless/wl12xx/main.c Ido Yariv 2011-03-01 694 spin_unlock_irqrestore(&wl->wl_lock, flags);
35fba0f0fd762a drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2020-07-02 695 }
35fba0f0fd762a drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2020-07-02 696 if (queue_tx_work)
35fba0f0fd762a drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2020-07-02 697 ieee80211_queue_work(wl->hw, &wl->tx_work);
35fba0f0fd762a drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2020-07-02 698 }
b07d4037051318 drivers/net/wireless/wl12xx/main.c Ido Yariv 2011-03-01 699
f5fc0f86b02afe drivers/net/wireless/wl12xx/wl1271_main.c Luciano Coelho 2009-08-06 @700 mutex_unlock(&wl->mutex);
a620865edf62ea drivers/net/wireless/wl12xx/main.c Ido Yariv 2011-03-01 701
4633d30b61ac14 drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2019-10-09 702 out_handled:
4633d30b61ac14 drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2019-10-09 703 spin_lock_irqsave(&wl->wl_lock, flags);
4633d30b61ac14 drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2019-10-09 704 clear_bit(WL1271_FLAG_IRQ_RUNNING, &wl->flags);
4633d30b61ac14 drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2019-10-09 705 spin_unlock_irqrestore(&wl->wl_lock, flags);
4633d30b61ac14 drivers/net/wireless/ti/wlcore/main.c Tony Lindgren 2019-10-09 706
a620865edf62ea drivers/net/wireless/wl12xx/main.c Ido Yariv 2011-03-01 707 return IRQ_HANDLED;
f5fc0f86b02afe drivers/net/wireless/wl12xx/wl1271_main.c Luciano Coelho 2009-08-06 708 }
f5fc0f86b02afe drivers/net/wireless/wl12xx/wl1271_main.c Luciano Coelho 2009-08-06 709

:::::: The code at line 700 was first introduced by commit
:::::: f5fc0f86b02afef1119b523623b4cde41475bc8c wl1271: add wl1271 driver files

:::::: TO: Luciano Coelho <luciano.coelho@xxxxxxxxx>
:::::: CC: John W. Linville <linville@xxxxxxxxxxxxx>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

Attachment: .config.gz
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Next message: kernel test robot: "Re: [PATCH] net: untag pointer in sockptr_is_kernel"
Previous message: Mauro Carvalho Chehab: "Re: [RFC][PATCH v3 11/11] misc: hisi_hikey_usb: Driver to support usb functionality of Hikey960"
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