net: qrtr: Handle IPCR control port format of older targets

The destination port value in the IPCR control buffer on older
targets is 0xFFFF. Handle the same by updating the dst_port to
QRTR_PORT_CTRL.

Change-Id: Ia70ce1c078ea84f0de47240f6fc3e764f4ae7a6f
Signed-off-by: Ajay Agarwal <ajaya@codeaurora.org>

net/qrtr/qrtr.c

@@ -36,6 +36,8 @@
 #define QRTR_MIN_EPH_SOCKET 0x4000
 #define QRTR_MAX_EPH_SOCKET 0x7fff
 
+#define QRTR_PORT_CTRL_LEGACY 0xffff
+
 /* qrtr socket states */
 #define QRTR_STATE_MULTI	-2
 #define QRTR_STATE_INIT	-1
@@ -668,6 +670,9 @@ int qrtr_endpoint_post(struct qrtr_endpoint *ep, const void *data, size_t len)
 		goto err;
 	}
 
+	if (cb->dst_port == QRTR_PORT_CTRL_LEGACY)
+		cb->dst_port = QRTR_PORT_CTRL;
+
 	if (len != ALIGN(size, 4) + hdrlen)
 		goto err;