1 files changed, 4 insertions, 0 deletions
diff --git a/pony_spi.c b/pony_spi.c
index b5dfc2f..6ce467e 100644
--- a/pony_spi.c
+++ b/pony_spi.c
@@ -99,6 +99,10 @@ int pony_spi_init(void)
 
 	if (arg && strlen(arg)) {
 		sp_fd = sp_openserport( arg, 9600 );
+		if (sp_fd < 0) {
+			free(arg);
+			return 1;
+		}
 		have_device++;
 	}
 	free(arg);