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Date: Tue, 6 Dec 2022 06:55:08 +0800
From: kernel test robot <lkp@...el.com>
To: Dawei Li <set_pte_at@...look.com>, gregkh@...uxfoundation.org
Cc: oe-kbuild-all@...ts.linux.dev, johannes@...solutions.net,
robert.jarzmik@...e.fr, jgross@...e.com, sstabellini@...nel.org,
oleksandr_tyshchenko@...m.com, roger.pau@...rix.com,
srinivas.kandagatla@...aro.org, bgoswami@...cinc.com,
mpe@...erman.id.au, npiggin@...il.com, christophe.leroy@...roup.eu,
kys@...rosoft.com, haiyangz@...rosoft.com, wei.liu@...nel.org,
decui@...rosoft.com, alsa-devel@...a-project.org,
linuxppc-dev@...ts.ozlabs.org, xen-devel@...ts.xenproject.org,
linux-hyperv@...r.kernel.org, linux-kernel@...r.kernel.org,
Dawei Li <set_pte_at@...look.com>
Subject: Re: [PATCH 1/6] hyperv: Make remove callback of hyperv driver void
returned
Hi Dawei,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on xen-tip/linux-next]
[also build test WARNING on linus/master v6.1-rc8 next-20221205]
[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#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Dawei-Li/hyperv-Make-remove-callback-of-hyperv-driver-void-returned/20221205-233927
base: https://git.kernel.org/pub/scm/linux/kernel/git/xen/tip.git linux-next
patch link: https://lore.kernel.org/r/TYCP286MB232373567792ED1AC5E0849FCA189%40TYCP286MB2323.JPNP286.PROD.OUTLOOK.COM
patch subject: [PATCH 1/6] hyperv: Make remove callback of hyperv driver void returned
config: x86_64-rhel-8.3-syz
compiler: gcc-11 (Debian 11.3.0-8) 11.3.0
reproduce (this is a W=1 build):
# https://github.com/intel-lab-lkp/linux/commit/19dc60f1e539ba31e531b89e5f57b9ce584be2f1
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Dawei-Li/hyperv-Make-remove-callback-of-hyperv-driver-void-returned/20221205-233927
git checkout 19dc60f1e539ba31e531b89e5f57b9ce584be2f1
# save the config file
mkdir build_dir && cp config build_dir/.config
make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash drivers/pci/controller/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
drivers/pci/controller/pci-hyperv.c: In function 'hv_pci_remove':
>> drivers/pci/controller/pci-hyperv.c:3822:13: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
3822 | int ret;
| ^~~
vim +/ret +3822 drivers/pci/controller/pci-hyperv.c
17978524a636d00 drivers/pci/host/pci-hyperv.c Dexuan Cui 2016-11-10 3812
17978524a636d00 drivers/pci/host/pci-hyperv.c Dexuan Cui 2016-11-10 3813 /**
17978524a636d00 drivers/pci/host/pci-hyperv.c Dexuan Cui 2016-11-10 3814 * hv_pci_remove() - Remove routine for this VMBus channel
17978524a636d00 drivers/pci/host/pci-hyperv.c Dexuan Cui 2016-11-10 3815 * @hdev: VMBus's tracking struct for this root PCI bus
17978524a636d00 drivers/pci/host/pci-hyperv.c Dexuan Cui 2016-11-10 3816 *
17978524a636d00 drivers/pci/host/pci-hyperv.c Dexuan Cui 2016-11-10 3817 * Return: 0 on success, -errno on failure
17978524a636d00 drivers/pci/host/pci-hyperv.c Dexuan Cui 2016-11-10 3818 */
19dc60f1e539ba3 drivers/pci/controller/pci-hyperv.c Dawei Li 2022-12-05 3819 static void hv_pci_remove(struct hv_device *hdev)
17978524a636d00 drivers/pci/host/pci-hyperv.c Dexuan Cui 2016-11-10 3820 {
17978524a636d00 drivers/pci/host/pci-hyperv.c Dexuan Cui 2016-11-10 3821 struct hv_pcibus_device *hbus;
a8e37506e79a7a0 drivers/pci/controller/pci-hyperv.c Dexuan Cui 2019-11-24 @3822 int ret;
4daace0d8ce851f drivers/pci/host/pci-hyperv.c Jake Oshins 2016-02-16 3823
17978524a636d00 drivers/pci/host/pci-hyperv.c Dexuan Cui 2016-11-10 3824 hbus = hv_get_drvdata(hdev);
4daace0d8ce851f drivers/pci/host/pci-hyperv.c Jake Oshins 2016-02-16 3825 if (hbus->state == hv_pcibus_installed) {
94d22763207ac66 drivers/pci/controller/pci-hyperv.c Long Li 2021-05-12 3826 tasklet_disable(&hdev->channel->callback_event);
94d22763207ac66 drivers/pci/controller/pci-hyperv.c Long Li 2021-05-12 3827 hbus->state = hv_pcibus_removing;
94d22763207ac66 drivers/pci/controller/pci-hyperv.c Long Li 2021-05-12 3828 tasklet_enable(&hdev->channel->callback_event);
94d22763207ac66 drivers/pci/controller/pci-hyperv.c Long Li 2021-05-12 3829 destroy_workqueue(hbus->wq);
94d22763207ac66 drivers/pci/controller/pci-hyperv.c Long Li 2021-05-12 3830 hbus->wq = NULL;
94d22763207ac66 drivers/pci/controller/pci-hyperv.c Long Li 2021-05-12 3831 /*
94d22763207ac66 drivers/pci/controller/pci-hyperv.c Long Li 2021-05-12 3832 * At this point, no work is running or can be scheduled
94d22763207ac66 drivers/pci/controller/pci-hyperv.c Long Li 2021-05-12 3833 * on hbus-wq. We can't race with hv_pci_devices_present()
94d22763207ac66 drivers/pci/controller/pci-hyperv.c Long Li 2021-05-12 3834 * or hv_pci_eject_device(), it's safe to proceed.
94d22763207ac66 drivers/pci/controller/pci-hyperv.c Long Li 2021-05-12 3835 */
94d22763207ac66 drivers/pci/controller/pci-hyperv.c Long Li 2021-05-12 3836
4daace0d8ce851f drivers/pci/host/pci-hyperv.c Jake Oshins 2016-02-16 3837 /* Remove the bus from PCI's point of view. */
4daace0d8ce851f drivers/pci/host/pci-hyperv.c Jake Oshins 2016-02-16 3838 pci_lock_rescan_remove();
418cb6c8e051119 drivers/pci/controller/pci-hyperv.c Arnd Bergmann 2021-07-27 3839 pci_stop_root_bus(hbus->bridge->bus);
15becc2b56c6eda drivers/pci/controller/pci-hyperv.c Dexuan Cui 2019-03-04 3840 hv_pci_remove_slots(hbus);
418cb6c8e051119 drivers/pci/controller/pci-hyperv.c Arnd Bergmann 2021-07-27 3841 pci_remove_root_bus(hbus->bridge->bus);
4daace0d8ce851f drivers/pci/host/pci-hyperv.c Jake Oshins 2016-02-16 3842 pci_unlock_rescan_remove();
4daace0d8ce851f drivers/pci/host/pci-hyperv.c Jake Oshins 2016-02-16 3843 }
4daace0d8ce851f drivers/pci/host/pci-hyperv.c Jake Oshins 2016-02-16 3844
a8e37506e79a7a0 drivers/pci/controller/pci-hyperv.c Dexuan Cui 2019-11-24 3845 ret = hv_pci_bus_exit(hdev, false);
deb22e5c84c884a drivers/pci/host/pci-hyperv.c Vitaly Kuznetsov 2016-04-29 3846
4daace0d8ce851f drivers/pci/host/pci-hyperv.c Jake Oshins 2016-02-16 3847 vmbus_close(hdev->channel);
4daace0d8ce851f drivers/pci/host/pci-hyperv.c Jake Oshins 2016-02-16 3848
4daace0d8ce851f drivers/pci/host/pci-hyperv.c Jake Oshins 2016-02-16 3849 iounmap(hbus->cfg_addr);
4daace0d8ce851f drivers/pci/host/pci-hyperv.c Jake Oshins 2016-02-16 3850 hv_free_config_window(hbus);
4daace0d8ce851f drivers/pci/host/pci-hyperv.c Jake Oshins 2016-02-16 3851 hv_pci_free_bridge_windows(hbus);
4daace0d8ce851f drivers/pci/host/pci-hyperv.c Jake Oshins 2016-02-16 3852 irq_domain_remove(hbus->irq_domain);
9e7f9178ab4943b drivers/pci/controller/pci-hyperv.c Boqun Feng 2021-07-27 3853 irq_domain_free_fwnode(hbus->fwnode);
be700103efd1050 drivers/pci/controller/pci-hyperv.c Haiyang Zhang 2019-08-15 3854
38c0d266dc80b81 drivers/pci/controller/pci-hyperv.c Boqun Feng 2021-07-27 3855 hv_put_dom_num(hbus->bridge->domain_nr);
be700103efd1050 drivers/pci/controller/pci-hyperv.c Haiyang Zhang 2019-08-15 3856
877b911a5ba0733 drivers/pci/controller/pci-hyperv.c Dexuan Cui 2019-11-24 3857 kfree(hbus);
4daace0d8ce851f drivers/pci/host/pci-hyperv.c Jake Oshins 2016-02-16 3858 }
4daace0d8ce851f drivers/pci/host/pci-hyperv.c Jake Oshins 2016-02-16 3859
--
0-DAY CI Kernel Test Service
https://01.org/lkp
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