Fix the size of receive buffer packing onto VirtIO ring.

Signed-off-by: Venkateswararao Jujjuri "<jvrao@linux.vnet.ibm.com>
Reviewed-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: NEric Van Hensbergen <ericvh@gmail.com>

net/9p/trans_virtio.c

@@ -367,7 +367,7 @@ p9_virtio_request(struct p9_client *client, struct p9_req_t *req)
 		in += inp;
 	} else {
 		in = pack_sg_list(chan->sg, out, VIRTQUEUE_NUM, rdata,
-				client->msize);
+				req->rc->capacity);
 	}
 
 	err = virtqueue_add_buf(chan->vq, chan->sg, out, in, req->tc);