From: kbuild test robot <lkp@intel.com>
To: Liu Yi L <yi.l.liu@intel.com>
Cc: kbuild-all@lists.01.org, alex.williamson@redhat.com,
kwankhede@nvidia.com, linux-kernel@vger.kernel.org,
kvm@vger.kernel.org, kevin.tian@intel.com, joro@8bytes.org,
peterx@redhat.com, baolu.lu@linux.intel.com,
Liu Yi L <yi.l.liu@intel.com>
Subject: Re: [PATCH v4 07/12] vfio_pci: shrink vfio_pci.c
Date: Wed, 8 Jan 2020 19:24:10 +0800 [thread overview]
Message-ID: <202001081944.Ax1eyQdP%lkp@intel.com> (raw)
In-Reply-To: <1578398509-26453-8-git-send-email-yi.l.liu@intel.com>
Hi Liu,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on v5.5-rc5]
[also build test WARNING on next-20200106]
[cannot apply to vfio/next]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]
url: https://github.com/0day-ci/linux/commits/Liu-Yi-L/vfio_pci-wrap-pci-device-as-a-mediated-device/20200108-020930
base: c79f46a282390e0f5b306007bf7b11a46d529538
reproduce:
# apt-get install sparse
# sparse version: v0.6.1-129-g341daf20-dirty
make ARCH=x86_64 allmodconfig
make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__'
If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@intel.com>
sparse warnings: (new ones prefixed by >>)
>> drivers/vfio/pci/vfio_pci_common.c:201:25: sparse: sparse: restricted pci_power_t degrades to integer
drivers/vfio/pci/vfio_pci_common.c:201:43: sparse: sparse: restricted pci_power_t degrades to integer
drivers/vfio/pci/vfio_pci_common.c:201:56: sparse: sparse: restricted pci_power_t degrades to integer
drivers/vfio/pci/vfio_pci_common.c:201:65: sparse: sparse: restricted pci_power_t degrades to integer
drivers/vfio/pci/vfio_pci_common.c:206:25: sparse: sparse: restricted pci_power_t degrades to integer
drivers/vfio/pci/vfio_pci_common.c:206:44: sparse: sparse: restricted pci_power_t degrades to integer
drivers/vfio/pci/vfio_pci_common.c:206:57: sparse: sparse: restricted pci_power_t degrades to integer
drivers/vfio/pci/vfio_pci_common.c:206:66: sparse: sparse: restricted pci_power_t degrades to integer
drivers/vfio/pci/vfio_pci_common.c:214:39: sparse: sparse: restricted pci_power_t degrades to integer
drivers/vfio/pci/vfio_pci_common.c:214:58: sparse: sparse: restricted pci_power_t degrades to integer
vim +201 drivers/vfio/pci/vfio_pci_common.c
8db581db521ec0 Liu Yi L 2020-01-07 186
8db581db521ec0 Liu Yi L 2020-01-07 187 /*
8db581db521ec0 Liu Yi L 2020-01-07 188 * pci_set_power_state() wrapper handling devices which perform a soft reset on
8db581db521ec0 Liu Yi L 2020-01-07 189 * D3->D0 transition. Save state prior to D0/1/2->D3, stash it on the vdev,
8db581db521ec0 Liu Yi L 2020-01-07 190 * restore when returned to D0. Saved separately from pci_saved_state for use
8db581db521ec0 Liu Yi L 2020-01-07 191 * by PM capability emulation and separately from pci_dev internal saved state
8db581db521ec0 Liu Yi L 2020-01-07 192 * to avoid it being overwritten and consumed around other resets.
8db581db521ec0 Liu Yi L 2020-01-07 193 */
8db581db521ec0 Liu Yi L 2020-01-07 194 int vfio_pci_set_power_state(struct vfio_pci_device *vdev, pci_power_t state)
8db581db521ec0 Liu Yi L 2020-01-07 195 {
8db581db521ec0 Liu Yi L 2020-01-07 196 struct pci_dev *pdev = vdev->pdev;
8db581db521ec0 Liu Yi L 2020-01-07 197 bool needs_restore = false, needs_save = false;
8db581db521ec0 Liu Yi L 2020-01-07 198 int ret;
8db581db521ec0 Liu Yi L 2020-01-07 199
8db581db521ec0 Liu Yi L 2020-01-07 200 if (vdev->needs_pm_restore) {
8db581db521ec0 Liu Yi L 2020-01-07 @201 if (pdev->current_state < PCI_D3hot && state >= PCI_D3hot) {
8db581db521ec0 Liu Yi L 2020-01-07 202 pci_save_state(pdev);
8db581db521ec0 Liu Yi L 2020-01-07 203 needs_save = true;
8db581db521ec0 Liu Yi L 2020-01-07 204 }
8db581db521ec0 Liu Yi L 2020-01-07 205
8db581db521ec0 Liu Yi L 2020-01-07 206 if (pdev->current_state >= PCI_D3hot && state <= PCI_D0)
8db581db521ec0 Liu Yi L 2020-01-07 207 needs_restore = true;
8db581db521ec0 Liu Yi L 2020-01-07 208 }
8db581db521ec0 Liu Yi L 2020-01-07 209
8db581db521ec0 Liu Yi L 2020-01-07 210 ret = pci_set_power_state(pdev, state);
8db581db521ec0 Liu Yi L 2020-01-07 211
8db581db521ec0 Liu Yi L 2020-01-07 212 if (!ret) {
8db581db521ec0 Liu Yi L 2020-01-07 213 /* D3 might be unsupported via quirk, skip unless in D3 */
8db581db521ec0 Liu Yi L 2020-01-07 214 if (needs_save && pdev->current_state >= PCI_D3hot) {
8db581db521ec0 Liu Yi L 2020-01-07 215 vdev->pm_save = pci_store_saved_state(pdev);
8db581db521ec0 Liu Yi L 2020-01-07 216 } else if (needs_restore) {
8db581db521ec0 Liu Yi L 2020-01-07 217 pci_load_and_free_saved_state(pdev, &vdev->pm_save);
8db581db521ec0 Liu Yi L 2020-01-07 218 pci_restore_state(pdev);
8db581db521ec0 Liu Yi L 2020-01-07 219 }
8db581db521ec0 Liu Yi L 2020-01-07 220 }
8db581db521ec0 Liu Yi L 2020-01-07 221
8db581db521ec0 Liu Yi L 2020-01-07 222 return ret;
8db581db521ec0 Liu Yi L 2020-01-07 223 }
8db581db521ec0 Liu Yi L 2020-01-07 224
:::::: The code at line 201 was first introduced by commit
:::::: 8db581db521ec047e12946a9c933f085c4d680ba vfio_pci: duplicate vfio_pci.c
:::::: TO: Liu Yi L <yi.l.liu@intel.com>
:::::: CC: 0day robot <lkp@intel.com>
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org Intel Corporation
next prev parent reply other threads:[~2020-01-08 11:25 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-07 12:01 [PATCH v4 00/12] vfio_pci: wrap pci device as a mediated device Liu Yi L
2020-01-07 12:01 ` [PATCH v4 01/12] vfio_pci: refine user config reference in vfio-pci module Liu Yi L
2020-01-09 22:48 ` Alex Williamson
2020-01-16 12:19 ` Liu, Yi L
2020-01-07 12:01 ` [PATCH v4 02/12] vfio_pci: move vfio_pci_is_vga/vfio_vga_disabled to header file Liu Yi L
2020-01-15 10:43 ` Cornelia Huck
2020-01-16 12:46 ` Liu, Yi L
2020-01-07 12:01 ` [PATCH v4 03/12] vfio_pci: refine vfio_pci_driver reference in vfio_pci.c Liu Yi L
2020-01-09 22:48 ` Alex Williamson
2020-01-10 7:35 ` Liu, Yi L
2020-01-07 12:01 ` [PATCH v4 04/12] vfio_pci: make common functions be extern Liu Yi L
2020-01-15 10:56 ` Cornelia Huck
2020-01-16 12:48 ` Liu, Yi L
2020-01-07 12:01 ` [PATCH v4 05/12] vfio_pci: duplicate vfio_pci.c Liu Yi L
2020-01-15 11:03 ` Cornelia Huck
2020-01-15 15:12 ` Alex Williamson
2020-01-07 12:01 ` [PATCH v4 06/12] vfio_pci: shrink vfio_pci_common.c Liu Yi L
2020-01-07 12:01 ` [PATCH v4 07/12] vfio_pci: shrink vfio_pci.c Liu Yi L
2020-01-08 11:24 ` kbuild test robot [this message]
2020-01-09 22:48 ` Alex Williamson
2020-01-16 12:42 ` Liu, Yi L
2020-01-07 12:01 ` [PATCH v4 08/12] vfio_pci: duplicate vfio_pci_private.h to include/linux Liu Yi L
2020-01-07 12:01 ` [PATCH v4 09/12] vfio: split vfio_pci_private.h into two files Liu Yi L
2020-01-09 22:48 ` Alex Williamson
2020-01-16 11:59 ` Liu, Yi L
2020-01-07 12:01 ` [PATCH v4 10/12] vfio: build vfio_pci_common.c into a kernel module Liu Yi L
2020-01-07 12:01 ` [PATCH v4 11/12] samples: add vfio-mdev-pci driver Liu Yi L
2020-01-09 22:48 ` Alex Williamson
2020-01-16 12:33 ` Liu, Yi L
2020-01-16 21:24 ` Alex Williamson
2020-01-18 14:25 ` Liu, Yi L
2020-01-20 21:07 ` Alex Williamson
2020-01-21 7:43 ` Tian, Kevin
2020-01-21 8:43 ` Yan Zhao
2020-01-21 20:04 ` Alex Williamson
2020-01-21 21:54 ` Yan Zhao
2020-01-23 23:33 ` Alex Williamson
2020-01-31 2:26 ` Yan Zhao
2020-01-15 12:30 ` Cornelia Huck
2020-01-16 13:23 ` Liu, Yi L
2020-01-16 17:40 ` Cornelia Huck
2020-01-18 14:23 ` Liu, Yi L
2020-01-20 8:55 ` Cornelia Huck
2020-01-07 12:01 ` [PATCH v4 12/12] samples: refine " Liu Yi L
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