Commit ede03d30 authored by Alan Cox's avatar Alan Cox Committed by David S. Miller

ser_gigaset: turn nonsense checks into WARN_ON

These checks do nothing useful to protect the code from races. On the
other hand if the old code has been masking a real bug we would like to
know about it.

The check for tiocmset is kept because it is valid for a tty driver to
have a NULL tiocmset method. That in itself is probably a mistake given
modern coding practices - but needs fixing in the tty layer.
Signed-off-by: default avatarAlan Cox <alan@linux.intel.com>
Acked-by: default avatarTilman Schmidt <tilman@imap.cc>
Signed-off-by: default avatarPaul Bolle <pebolle@tiscali.nl>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 74375c05
......@@ -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;
......
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