From 7c95f8bb5fdb0c242e4d39a8b5291b9fa0544fe6 Mon Sep 17 00:00:00 2001
From: Heikki Hannikainen <hessu@hes.iki.fi>
Date: Tue, 24 Feb 2015 14:56:19 +0200
Subject: [PATCH] hackrf_init: only call libusb_init() once

---
 host/libhackrf/src/hackrf.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/host/libhackrf/src/hackrf.c b/host/libhackrf/src/hackrf.c
index d46f91a5..256948e9 100644
--- a/host/libhackrf/src/hackrf.c
+++ b/host/libhackrf/src/hackrf.c
@@ -240,6 +240,10 @@ extern "C"
 
 int ADDCALL hackrf_init(void)
 {
+	if (g_libusb_context != NULL) {
+		return HACKRF_SUCCESS;
+	}
+	
 	const int libusb_error = libusb_init(&g_libusb_context);
 	if( libusb_error != 0 )
 	{