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From:   Jason Wang <jasowang@redhat.com>
To:     mst@redhat.com, jasowang@redhat.com
Cc:     lulu@redhat.com, kvm@vger.kernel.org,
        virtualization@lists.linux-foundation.org, netdev@vger.kernel.org,
        linux-kernel@vger.kernel.org, rob.miller@broadcom.com,
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        mhabets@solarflare.com, eli@mellanox.com, amorenoz@redhat.com,
        maxime.coquelin@redhat.com, stefanha@redhat.com,
        sgarzare@redhat.com
Subject: [RFC PATCH 04/24] virtio-vdpa: don't set callback if virtio doesn't need it
Date:   Thu, 24 Sep 2020 11:21:05 +0800
Message-Id: <20200924032125.18619-5-jasowang@redhat.com>
In-Reply-To: <20200924032125.18619-1-jasowang@redhat.com>
References: <20200924032125.18619-1-jasowang@redhat.com>
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There's no need for setting callbacks for the driver that doesn't care
about that.

Signed-off-by: Jason Wang <jasowang@redhat.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));
-- 
2.20.1