linux-kernel - [RFC PATCH 07/10] vfio/pci: Notify on device release

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Message-ID: <161401271528.16443.2318400142031983698.stgit@gimli.home>
Date:   Mon, 22 Feb 2021 09:51:55 -0700
From:   Alex Williamson <alex.williamson@...hat.com>
To:     alex.williamson@...hat.com
Cc:     cohuck@...hat.com, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, jgg@...dia.com, peterx@...hat.com
Subject: [RFC PATCH 07/10] vfio/pci: Notify on device release

Trigger a release notifier call when open reference count is zero.

Signed-off-by: Alex Williamson <alex.williamson@...hat.com>
---
 drivers/vfio/pci/vfio_pci.c |    1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/vfio/pci/vfio_pci.c b/drivers/vfio/pci/vfio_pci.c
index f9529bac6c97..fb8307430e24 100644
--- a/drivers/vfio/pci/vfio_pci.c
+++ b/drivers/vfio/pci/vfio_pci.c
@@ -560,6 +560,7 @@ static void vfio_pci_release(void *device_data)
 	mutex_lock(&vdev->reflck->lock);
 
 	if (!(--vdev->refcnt)) {
+		vfio_device_notifier_call(vdev->device, VFIO_DEVICE_RELEASE);
 		vfio_pci_vf_token_user_add(vdev, -1);
 		vfio_spapr_pci_eeh_release(vdev->pdev);
 		vfio_pci_disable(vdev);