virtio_pmem: fix sparse warning

This patch fixes below sparse warning related to __virtio
type in virtio pmem driver. This is reported by Intel test
bot on linux-next tree.

nd_virtio.c:56:28: warning: incorrect type in assignment
                                (different base types)
nd_virtio.c:56:28:    expected unsigned int [unsigned] [usertype] type
nd_virtio.c:56:28:    got restricted __virtio32
nd_virtio.c:93:59: warning: incorrect type in argument 2
                                (different base types)
nd_virtio.c:93:59:    expected restricted __virtio32 [usertype] val
nd_virtio.c:93:59:    got unsigned int [unsigned] [usertype] ret
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Pankaj Gupta <pagupta@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>

drivers/nvdimm/nd_virtio.c

@@ -53,7 +53,7 @@ static int virtio_pmem_flush(struct nd_region *nd_region)
 	init_waitqueue_head(&req_data->host_acked);
 	init_waitqueue_head(&req_data->wq_buf);
 	INIT_LIST_HEAD(&req_data->list);
-	req_data->req.type = cpu_to_virtio32(vdev, VIRTIO_PMEM_REQ_TYPE_FLUSH);
+	req_data->req.type = cpu_to_le32(VIRTIO_PMEM_REQ_TYPE_FLUSH);
 	sg_init_one(&sg, &req_data->req, sizeof(req_data->req));
 	sgs[0] = &sg;
 	sg_init_one(&ret, &req_data->resp.ret, sizeof(req_data->resp));
@@ -90,7 +90,7 @@ static int virtio_pmem_flush(struct nd_region *nd_region)
 	} else {
 		/* A host repsonse results in "host_ack" getting called */
 		wait_event(req_data->host_acked, req_data->done);
-		err = virtio32_to_cpu(vdev, req_data->resp.ret);
+		err = le32_to_cpu(req_data->resp.ret);
 	}
 
 	kfree(req_data);

include/uapi/linux/virtio_pmem.h

@@ -23,12 +23,12 @@ struct virtio_pmem_config {
 
 struct virtio_pmem_resp {
 	/* Host return status corresponding to flush request */
-	__u32 ret;
+	__le32 ret;
 };
 
 struct virtio_pmem_req {
 	/* command type */
-	__u32 type;
+	__le32 type;
 };
 
 #endif