linux-kernel - [PATCH 3/4] hisi_acc_vfio_pci: resolve duplicate migration states

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Message-ID: <20260104070706.4107994-4-liulongfang@huawei.com>
Date: Sun, 4 Jan 2026 15:07:05 +0800
From: Longfang Liu <liulongfang@...wei.com>
To: <alex.williamson@...hat.com>, <jgg@...dia.com>,
	<jonathan.cameron@...wei.com>
CC: <kvm@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<liulongfang@...wei.com>
Subject: [PATCH 3/4] hisi_acc_vfio_pci: resolve duplicate migration states

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@...wei.com>
---
 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 e782c2274871..394f1952a7ed 100644
--- a/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c
+++ b/drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c
@@ -1583,6 +1583,7 @@ 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);
 	}

-- 
2.24.0