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Date: Sun, 22 Dec 2019 08:52:00 -0800
From: Alexander Duyck <alexander.duyck@...il.com>
To: Nathan Chancellor <natechancellor@...il.com>
Cc: Jeff Kirsher <jeffrey.t.kirsher@...el.com>, kbuild@...ts.01.org,
Nick Desaulniers <ndesaulniers@...gle.com>,
clang-built-linux@...glegroups.com,
kbuild test robot <lkp@...el.com>,
Netdev <netdev@...r.kernel.org>
Subject: Re: [jkirsher-net-queue:dev-queue 5/5] drivers/net/ethernet/intel/e1000e/netdev.c:7604:7:
warning: address of function 'down' will always evaluate to 'true'
Yes, it looks like the patch called out below reverted part of my earlier patch:
commit daee5598e491d8d3979bd4ad6c447d89ce57b446
Author: Alexander Duyck <alexander.h.duyck@...ux.intel.com>
Date: Fri Oct 11 08:34:59 2019 -0700
e1000e: Drop unnecessary __E1000_DOWN bit twiddling
Since we no longer check for __E1000_DOWN in e1000e_close we can drop the
spot where we were restoring the bit. This saves us a bit of unnecessary
complexity.
Signed-off-by: Alexander Duyck <alexander.h.duyck@...ux.intel.com>
Tested-by: Aaron Brown <aaron.f.brown@...el.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
On Sat, Dec 21, 2019 at 7:37 PM Nathan Chancellor
<natechancellor@...il.com> wrote:
>
> Hi Jeff,
>
> We received this build report from the 0day team with clang, seems
> legit. Mind taking a look into it?
>
> Cheers,
> Nathan
>
> On Sun, Dec 22, 2019 at 03:36:15AM +0800, kbuild test robot wrote:
> > CC: kbuild-all@...ts.01.org
> > CC: intel-wired-lan@...ts.osuosl.org
> > TO: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
> >
> > tree: https://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net-queue.git dev-queue
> > head: 831655569c70675c1622f8c52ed271dc7fdce42f
> > commit: 831655569c70675c1622f8c52ed271dc7fdce42f [5/5] e1000e: Revert "e1000e: Make watchdog use delayed work"
> > config: arm64-defconfig (attached as .config)
> > compiler: clang version 10.0.0 (git://gitmirror/llvm_project 3ced23976aa8a86a17017c87821c873b4ca80bc2)
> > reproduce:
> > wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> > chmod +x ~/bin/make.cross
> > git checkout 831655569c70675c1622f8c52ed271dc7fdce42f
> > # save the attached .config to linux build tree
> > make.cross ARCH=arm64
> >
> > If you fix the issue, kindly add following tag
> > Reported-by: kbuild test robot <lkp@...el.com>
> >
> > All warnings (new ones prefixed by >>):
> >
> > >> drivers/net/ethernet/intel/e1000e/netdev.c:7604:7: warning: address of function 'down' will always evaluate to 'true' [-Wpointer-bool-conversion]
> > if (!down)
> > ~^~~~
> > drivers/net/ethernet/intel/e1000e/netdev.c:7604:7: note: prefix with the address-of operator to silence this warning
> > if (!down)
> > ^
> > &
> > 1 warning generated.
> >
> > vim +7604 drivers/net/ethernet/intel/e1000e/netdev.c
> >
> > 7584
> > 7585 /**
> > 7586 * e1000_remove - Device Removal Routine
> > 7587 * @pdev: PCI device information struct
> > 7588 *
> > 7589 * e1000_remove is called by the PCI subsystem to alert the driver
> > 7590 * that it should release a PCI device. The could be caused by a
> > 7591 * Hot-Plug event, or because the driver is going to be removed from
> > 7592 * memory.
> > 7593 **/
> > 7594 static void e1000_remove(struct pci_dev *pdev)
> > 7595 {
> > 7596 struct net_device *netdev = pci_get_drvdata(pdev);
> > 7597 struct e1000_adapter *adapter = netdev_priv(netdev);
> > 7598
> > 7599 e1000e_ptp_remove(adapter);
> > 7600
> > 7601 /* The timers may be rescheduled, so explicitly disable them
> > 7602 * from being rescheduled.
> > 7603 */
> > > 7604 if (!down)
> > 7605 set_bit(__E1000_DOWN, &adapter->state);
> > 7606 del_timer_sync(&adapter->watchdog_timer);
> > 7607 del_timer_sync(&adapter->phy_info_timer);
> > 7608
> > 7609 cancel_work_sync(&adapter->reset_task);
> > 7610 cancel_work_sync(&adapter->watchdog_task);
> > 7611 cancel_work_sync(&adapter->downshift_task);
> > 7612 cancel_work_sync(&adapter->update_phy_task);
> > 7613 cancel_work_sync(&adapter->print_hang_task);
> > 7614
> > 7615 if (adapter->flags & FLAG_HAS_HW_TIMESTAMP) {
> > 7616 cancel_work_sync(&adapter->tx_hwtstamp_work);
> > 7617 if (adapter->tx_hwtstamp_skb) {
> > 7618 dev_consume_skb_any(adapter->tx_hwtstamp_skb);
> > 7619 adapter->tx_hwtstamp_skb = NULL;
> > 7620 }
> > 7621 }
> > 7622
> > 7623 unregister_netdev(netdev);
> > 7624
> > 7625 if (pci_dev_run_wake(pdev))
> > 7626 pm_runtime_get_noresume(&pdev->dev);
> > 7627
> > 7628 /* Release control of h/w to f/w. If f/w is AMT enabled, this
> > 7629 * would have already happened in close and is redundant.
> > 7630 */
> > 7631 e1000e_release_hw_control(adapter);
> > 7632
> > 7633 e1000e_reset_interrupt_capability(adapter);
> > 7634 kfree(adapter->tx_ring);
> > 7635 kfree(adapter->rx_ring);
> > 7636
> > 7637 iounmap(adapter->hw.hw_addr);
> > 7638 if ((adapter->hw.flash_address) &&
> > 7639 (adapter->hw.mac.type < e1000_pch_spt))
> > 7640 iounmap(adapter->hw.flash_address);
> > 7641 pci_release_mem_regions(pdev);
> > 7642
> > 7643 free_netdev(netdev);
> > 7644
> > 7645 /* AER disable */
> > 7646 pci_disable_pcie_error_reporting(pdev);
> > 7647
> > 7648 pci_disable_device(pdev);
> > 7649 }
> > 7650
> >
> > ---
> > 0-DAY kernel test infrastructure Open Source Technology Center
> > https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org Intel Corporation
> >
> > --
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>
>
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