Merge commit '24274c4' into bfgminer-3.5.x

driver-littlefury.c

@@ -298,6 +298,9 @@ bool littlefury_detect_one(const char *devpath)
 	
 	serial_close(fd);
 	
+	if (serial_claim_v(devpath, &littlefury_drv))
+		return false;
+	
 	struct cgpu_info *cgpu;
 	cgpu = malloc(sizeof(*cgpu));
 	*cgpu = (struct cgpu_info){