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Date:   Wed, 16 Dec 2020 14:47:59 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     mst@...hat.com, jasowang@...hat.com
Cc:     eperezma@...hat.com, kvm@...r.kernel.org,
        virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, lulu@...hat.com, eli@...lanox.com,
        lingshan.zhu@...el.com, rob.miller@...adcom.com,
        stefanha@...hat.com, sgarzare@...hat.com
Subject: [PATCH 02/21] virtio-vdpa: don't set callback if virtio doesn't need it

There's no need for setting callbacks for the driver that doesn't care
about that.

Signed-off-by: Jason Wang <jasowang@...hat.com>
---
 drivers/virtio/virtio_vdpa.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/virtio/virtio_vdpa.c b/drivers/virtio/virtio_vdpa.c
index 4a9ddb44b2a7..af6ee677f319 100644
--- a/drivers/virtio/virtio_vdpa.c
+++ b/drivers/virtio/virtio_vdpa.c
@@ -175,7 +175,7 @@ virtio_vdpa_setup_vq(struct virtio_device *vdev, unsigned int index,
 	}
 
 	/* Setup virtqueue callback */
-	cb.callback = virtio_vdpa_virtqueue_cb;
+	cb.callback = callback ? virtio_vdpa_virtqueue_cb : NULL;
 	cb.private = info;
 	ops->set_vq_cb(vdpa, index, &cb);
 	ops->set_vq_num(vdpa, index, virtqueue_get_vring_size(vq));
-- 
2.25.1

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