v4.19.13 snapshot.
diff --git a/net/qrtr/smd.c b/net/qrtr/smd.c
new file mode 100644
index 0000000..9cf089b
--- /dev/null
+++ b/net/qrtr/smd.c
@@ -0,0 +1,119 @@
+/*
+ * Copyright (c) 2015, Sony Mobile Communications Inc.
+ * Copyright (c) 2013, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/skbuff.h>
+#include <linux/rpmsg.h>
+
+#include "qrtr.h"
+
+struct qrtr_smd_dev {
+ struct qrtr_endpoint ep;
+ struct rpmsg_endpoint *channel;
+ struct device *dev;
+};
+
+/* from smd to qrtr */
+static int qcom_smd_qrtr_callback(struct rpmsg_device *rpdev,
+ void *data, int len, void *priv, u32 addr)
+{
+ struct qrtr_smd_dev *qdev = dev_get_drvdata(&rpdev->dev);
+ int rc;
+
+ if (!qdev)
+ return -EAGAIN;
+
+ rc = qrtr_endpoint_post(&qdev->ep, data, len);
+ if (rc == -EINVAL) {
+ dev_err(qdev->dev, "invalid ipcrouter packet\n");
+ /* return 0 to let smd drop the packet */
+ rc = 0;
+ }
+
+ return rc;
+}
+
+/* from qrtr to smd */
+static int qcom_smd_qrtr_send(struct qrtr_endpoint *ep, struct sk_buff *skb)
+{
+ struct qrtr_smd_dev *qdev = container_of(ep, struct qrtr_smd_dev, ep);
+ int rc;
+
+ rc = skb_linearize(skb);
+ if (rc)
+ goto out;
+
+ rc = rpmsg_send(qdev->channel, skb->data, skb->len);
+
+out:
+ if (rc)
+ kfree_skb(skb);
+ else
+ consume_skb(skb);
+ return rc;
+}
+
+static int qcom_smd_qrtr_probe(struct rpmsg_device *rpdev)
+{
+ struct qrtr_smd_dev *qdev;
+ int rc;
+
+ qdev = devm_kzalloc(&rpdev->dev, sizeof(*qdev), GFP_KERNEL);
+ if (!qdev)
+ return -ENOMEM;
+
+ qdev->channel = rpdev->ept;
+ qdev->dev = &rpdev->dev;
+ qdev->ep.xmit = qcom_smd_qrtr_send;
+
+ rc = qrtr_endpoint_register(&qdev->ep, QRTR_EP_NID_AUTO);
+ if (rc)
+ return rc;
+
+ dev_set_drvdata(&rpdev->dev, qdev);
+
+ dev_dbg(&rpdev->dev, "Qualcomm SMD QRTR driver probed\n");
+
+ return 0;
+}
+
+static void qcom_smd_qrtr_remove(struct rpmsg_device *rpdev)
+{
+ struct qrtr_smd_dev *qdev = dev_get_drvdata(&rpdev->dev);
+
+ qrtr_endpoint_unregister(&qdev->ep);
+
+ dev_set_drvdata(&rpdev->dev, NULL);
+}
+
+static const struct rpmsg_device_id qcom_smd_qrtr_smd_match[] = {
+ { "IPCRTR" },
+ {}
+};
+
+static struct rpmsg_driver qcom_smd_qrtr_driver = {
+ .probe = qcom_smd_qrtr_probe,
+ .remove = qcom_smd_qrtr_remove,
+ .callback = qcom_smd_qrtr_callback,
+ .id_table = qcom_smd_qrtr_smd_match,
+ .drv = {
+ .name = "qcom_smd_qrtr",
+ },
+};
+
+module_rpmsg_driver(qcom_smd_qrtr_driver);
+
+MODULE_ALIAS("rpmsg:IPCRTR");
+MODULE_DESCRIPTION("Qualcomm IPC-Router SMD interface driver");
+MODULE_LICENSE("GPL v2");