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-rw-r--r--drivers/isdn/gigaset/ev-layer.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/isdn/gigaset/ev-layer.c b/drivers/isdn/gigaset/ev-layer.c
index dcae14aef376..0f699ebd81c5 100644
--- a/drivers/isdn/gigaset/ev-layer.c
+++ b/drivers/isdn/gigaset/ev-layer.c
@@ -1380,6 +1380,11 @@ static void do_action(int action, struct cardstate *cs,
/* events from the LL */
case ACT_DIAL:
+ if (!ev->ptr) {
+ *p_genresp = 1;
+ *p_resp_code = RSP_ERROR;
+ break;
+ }
start_dial(at_state, ev->ptr, ev->parameter);
break;
case ACT_ACCEPT: