diff --git a/[refs] b/[refs]
index 5b4b340854d0..761de3d81a98 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 32f6249ba7d63d5d86dae930d63ca70ec11d59af
+refs/heads/master: e72e9f3814cb8c1076d627c29cec90b005838ac3
diff --git a/trunk/drivers/isdn/hardware/mISDN/hfcsusb.c b/trunk/drivers/isdn/hardware/mISDN/hfcsusb.c
index b3b7e2879bac..8700474747e8 100644
--- a/trunk/drivers/isdn/hardware/mISDN/hfcsusb.c
+++ b/trunk/drivers/isdn/hardware/mISDN/hfcsusb.c
@@ -97,8 +97,10 @@ static int write_reg(struct hfcsusb *hw, __u8 reg, __u8 val)
 			hw->name, __func__, reg, val);
 
 	spin_lock(&hw->ctrl_lock);
-	if (hw->ctrl_cnt >= HFC_CTRL_BUFSIZE)
+	if (hw->ctrl_cnt >= HFC_CTRL_BUFSIZE) {
+		spin_unlock(&hw->ctrl_lock);
 		return 1;
+	}
 	buf = &hw->ctrl_buff[hw->ctrl_in_idx];
 	buf->hfcs_reg = reg;
 	buf->reg_val = val;