static void log_message(am7xxx_context *ctx,
                        int level,
-                       const char *function,
+                       const char *function_name,
                        int line,
                        const char *fmt,
                        ...) __attribute__ ((format (printf, 5, 6)));
  * set up */
 static void log_message(am7xxx_context *ctx,
                        int level,
-                       const char *function,
+                       const char *function_name,
                        int line,
                        const char *fmt,
                        ...)
        va_list ap;
 
        if (level == AM7XXX_LOG_FATAL || (ctx && level <= ctx->log_level)) {
-               if (function) {
-                       fprintf(stderr, "%s", function);
+               if (function_name) {
+                       fprintf(stderr, "%s", function_name);
                        if (line)
                                fprintf(stderr, "[%d]", line);
                        fprintf(stderr, ": ");
 
        new_device = malloc(sizeof(*new_device));
        if (new_device == NULL) {
-               fatal("cannot allocate a new device (%s)\n", strerror(errno));
+               debug(ctx, "cannot allocate a new device (%s)\n", strerror(errno));
                return NULL;
        }
        memset(new_device, 0, sizeof(*new_device));
 
        /* the usb device has already been opened */
        if ((*dev)->usb_device) {
-               debug(ctx, "(*dev)->usb_device already set\n");
                ret = 1;
                goto out;
        }