[E1 input] make sure config file with new E1 input config saves correctly
diff --git a/openbsc/src/e1_input.c b/openbsc/src/e1_input.c
index e8587c9..67a62e4 100644
--- a/openbsc/src/e1_input.c
+++ b/openbsc/src/e1_input.c
@@ -341,12 +341,18 @@
int i;
line = e1inp_line_get(e1_nr);
- if (line)
+ if (line) {
+ LOGP(DINP, LOGL_ERROR, "E1 Line %u already exists\n",
+ e1_nr);
return NULL;
+ }
driver = e1inp_driver_find(driver_name);
- if (!driver)
+ if (!driver) {
+ LOGP(DINP, LOGL_ERROR, "No such E1 driver '%s'\n",
+ driver_name);
return NULL;
+ }
line = talloc_zero(tall_bsc_ctx, struct e1inp_line);
if (!line)