tmakin/ack-tegra
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

hisi_acc_vfio_pci: bugfix the problem of uninstalling driver

Browse Source 
[ Upstream commit db6525a8573957faea28850392f4744e5f8f7a53 ]

In a live migration scenario. If the number of VFs at the
destination is greater than the source, the recovery operation
will fail and qemu will not be able to complete the process and
exit after shutting down the device FD.

This will cause the driver to be unable to be unloaded normally due
to abnormal reference counting of the live migration driver caused
by the abnormal closing operation of fd.

Therefore, make sure the migration file descriptor references are
always released when the device is closed.

Fixes: b0eed08590 ("hisi_acc_vfio_pci: Add support for VFIO live migration")
Signed-off-by: Longfang Liu <liulongfang@huawei.com>
Reviewed-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
Link: https://lore.kernel.org/r/20250510081155.55840-5-liulongfang@huawei.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Longfang Liu
2025-07-05 21:45:06 -04:00
committed by Greg Kroah-Hartman
parent bac4641756
commit be1e0287ac
1 changed files with 1 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c
View File

@@ -1359,6 +1359,7 @@ static void hisi_acc_vfio_pci_close_device(struct vfio_device *core_vdev)
struct hisi_acc_vf_core_device, core_device.vdev);
struct hisi_qm *vf_qm = &hisi_acc_vdev->vf_qm;
hisi_acc_vf_disable_fds(hisi_acc_vdev);
iounmap(vf_qm->io_base);
vfio_pci_core_close_device(core_vdev);
}