diff --git a/drivers/isdn/hisax/amd7930_fn.c b/drivers/isdn/hisax/amd7930_fn.c
index bf526a7a63af4a7dd763130d3e1f30c773fa2da4..d6fdf1f66754b5886eae439a1ad61becac5e6b4f 100644
--- a/drivers/isdn/hisax/amd7930_fn.c
+++ b/drivers/isdn/hisax/amd7930_fn.c
@@ -594,6 +594,7 @@ Amd7930_l1hw(struct PStack *st, int pr, void *arg)
 				if (cs->debug & L1_DEB_WARN)
 					debugl1(cs, "Amd7930: l1hw: l2l1 tx_skb exist this shouldn't happen");
 				skb_queue_tail(&cs->sq, skb);
+				spin_unlock_irqrestore(&cs->lock, flags);
 				break;
 			}
 			if (cs->debug & DEB_DLOG_HEX)
diff --git a/drivers/isdn/hisax/icc.c b/drivers/isdn/hisax/icc.c
index 9aba646ba221c814e33cbddb0e60f9779b5a30f4..c80cbb8a2ef9f5ceb6452162bad1b01ccb6a7b0c 100644
--- a/drivers/isdn/hisax/icc.c
+++ b/drivers/isdn/hisax/icc.c
@@ -468,6 +468,7 @@ ICC_l1hw(struct PStack *st, int pr, void *arg)
 				if (cs->debug & L1_DEB_WARN)
 					debugl1(cs, " l2l1 tx_skb exist this shouldn't happen");
 				skb_queue_tail(&cs->sq, skb);
+				spin_unlock_irqrestore(&cs->lock, flags);
 				break;
 			}
 			if (cs->debug & DEB_DLOG_HEX)