[PATCH 6.18 298/752] hisi_acc_vfio_pci: resolve duplicate migration states

Sasha Levin
2026-02-28T17:52:17Z

From: Longfang Liu <liulongfang@huawei.com>

[ Upstream commit 8c6ac1730a977234dff74cc1753b4a953f59be7b ]

In special scenarios involving duplicate migrations, after the
first migration is completed, if the original VF device is used
again and then migrated to another destination, the state indicating
data migration completion for the VF device is not reset.
This results in the second migration to the destination being skipped
without performing data migration.
After the modification, it ensures that a complete data migration
is performed after the subsequent migration.

Signed-off-by: Longfang Liu <liulongfang@huawei.com>
Link: https://lore.kernel.org/r/20260122020205.2884497-4-liulongfang@huawei.com
Signed-off-by: Alex Williamson <alex@shazbot.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c b/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c
index ed2ae035deb16..c7559f1d4e2f2 100644
--- a/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c
+++ b/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c
@@ -1529,6 +1529,7 @@ static int hisi_acc_vfio_pci_open_device(struct vfio_device *core_vdev)
}
hisi_acc_vdev->mig_state = VFIO_DEVICE_STATE_RUNNING;
hisi_acc_vdev->dev_opened = true;
+ hisi_acc_vdev->match_done = 0;
mutex_unlock(&hisi_acc_vdev->open_mutex);
}

--
2.51.0