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vhost/vsock: split out vhost_vsock_drop_backends helper

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Split the actual backend dropping part from vhost_vsock_stop.  We're
going to need it for the VHOST_RESET_OWNER implementation in the
following patch, when vsock->dev.mutex is already taken and owner is
checked.

Signed-off-by: Pavel Tikhomirov <ptikhomirov@virtuozzo.com>
Signed-off-by: Andrey Drobyshev <andrey.drobyshev@virtuozzo.com>
Reviewed-by: Pavel Tikhomirov <ptikhomirov@virtuozzo.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-ID: <20260724114542.734623-2-andrey.drobyshev@virtuozzo.com>
This commit is contained in:
Pavel Tikhomirov 2026-07-24 14:45:38 +03:00 committed by Michael S. Tsirkin
parent ac7360d486
commit 01b8354fa2
1 changed files with 17 additions and 9 deletions
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26
drivers/vhost/vsock.c
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@ -664,9 +664,24 @@ static int vhost_vsock_start(struct vhost_vsock *vsock)
return ret;
}
static void vhost_vsock_drop_backends(struct vhost_vsock *vsock)
{
struct vhost_virtqueue *vq;
size_t i;
lockdep_assert_held(&vsock->dev.mutex);
for (i = 0; i < ARRAY_SIZE(vsock->vqs); i++) {
vq = &vsock->vqs[i];
mutex_lock(&vq->mutex);
vhost_vq_set_backend(vq, NULL);
mutex_unlock(&vq->mutex);
}
}
static int vhost_vsock_stop(struct vhost_vsock *vsock, bool check_owner)
{
size_t i;
int ret = 0;
mutex_lock(&vsock->dev.mutex);
@ -677,14 +692,7 @@ static int vhost_vsock_stop(struct vhost_vsock *vsock, bool check_owner)
goto err;
}
for (i = 0; i < ARRAY_SIZE(vsock->vqs); i++) {
struct vhost_virtqueue *vq = &vsock->vqs[i];
mutex_lock(&vq->mutex);
vhost_vq_set_backend(vq, NULL);
mutex_unlock(&vq->mutex);
}
vhost_vsock_drop_backends(vsock);
err:
mutex_unlock(&vsock->dev.mutex);
return ret;