am7xxx: print an error message when libusb_init fails

diff --git a/src/am7xxx.c b/src/am7xxx.c
index b4e3e54..94b01ac 100644 (file)
--- a/src/am7xxx.c
+++ b/src/am7xxx.c
@@ -1101,8 +1101,10 @@ AM7XXX_PUBLIC int am7xxx_init(am7xxx_context **ctx)
        (*ctx)->log_level = AM7XXX_LOG_TRACE;
 
        ret = libusb_init(&((*ctx)->usb_context));
-       if (ret < 0)
+       if (ret < 0) {
+               error(*ctx, "libusb_init failed: %s\n", libusb_error_name(ret));
                goto out_free_context;
+       }
 
        libusb_set_debug((*ctx)->usb_context, LIBUSB_LOG_LEVEL_INFO);