linux-kernel - Re: [PATCH 4/5] hisi_acc_vfio_pci: bugfix the problem of uninstalling driver

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Message-ID: <20241209134953.GA1888283@ziepe.ca>
Date: Mon, 9 Dec 2024 09:49:53 -0400
From: Jason Gunthorpe <jgg@...pe.ca>
To: Longfang Liu <liulongfang@...wei.com>
Cc: alex.williamson@...hat.com, shameerali.kolothum.thodi@...wei.com,
	jonathan.cameron@...wei.com, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org, linuxarm@...neuler.org
Subject: Re: [PATCH 4/5] hisi_acc_vfio_pci: bugfix the problem of
 uninstalling driver

On Fri, Dec 06, 2024 at 05:33:11PM +0800, Longfang Liu wrote:
> 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.
> 
> Signed-off-by: Longfang Liu <liulongfang@...wei.com>
> ---
>  drivers/vfio/pci/hisilicon/hisi_acc_vfio_pci.c | 1 +
>  1 file changed, 1 insertion(+)

This one needs a fixes line and probably cc stable

Jason