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path: root/drivers/isdn/gigaset/ser-gigaset.c
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Diffstat (limited to 'drivers/isdn/gigaset/ser-gigaset.c')
-rw-r--r--drivers/isdn/gigaset/ser-gigaset.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/isdn/gigaset/ser-gigaset.c b/drivers/isdn/gigaset/ser-gigaset.c
index d8771b5d6904..8e21f6afa832 100644
--- a/drivers/isdn/gigaset/ser-gigaset.c
+++ b/drivers/isdn/gigaset/ser-gigaset.c
@@ -67,8 +67,7 @@ static int write_modem(struct cardstate *cs)
struct sk_buff *skb = bcs->tx_skb;
int sent = -EOPNOTSUPP;
- if (!tty || !tty->ops || !skb)
- return -EINVAL;
+ WARN_ON(!tty || !tty->ops || !skb);
if (!skb->len) {
dev_kfree_skb_any(skb);
@@ -109,8 +108,7 @@ static int send_cb(struct cardstate *cs)
unsigned long flags;
int sent = 0;
- if (!tty || !tty->ops)
- return -EFAULT;
+ WARN_ON(!tty || !tty->ops);
cb = cs->cmdbuf;
if (!cb)
@@ -432,7 +430,9 @@ static int gigaset_set_modem_ctrl(struct cardstate *cs, unsigned old_state,
struct tty_struct *tty = cs->hw.ser->tty;
unsigned int set, clear;
- if (!tty || !tty->ops || !tty->ops->tiocmset)
+ WARN_ON(!tty || !tty->ops);
+ /* tiocmset is an optional tty driver method */
+ if (!tty->ops->tiocmset)
return -EINVAL;
set = new_state & ~old_state;
clear = old_state & ~new_state;