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dgnc: break-related ioctls won't reach ->ioctl()

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kill the dead code, especially since ->break_ctl() will do the
right thing anyway.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2018-09-12 18:32:47 -04:00
parent 6bbf265892
commit b413f00ab1
1 changed files with 0 additions and 75 deletions
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75
drivers/staging/dgnc/dgnc_tty.c
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@ -2081,81 +2081,6 @@ static int dgnc_tty_ioctl(struct tty_struct *tty, unsigned int cmd,
switch (cmd) {
/* Here are all the standard ioctl's that we MUST implement */
case TCSBRK:
/*
* TCSBRK is SVID version: non-zero arg --> no break
* this behaviour is exploited by tcdrain().
*
* According to POSIX.1 spec (7.2.2.1.2) breaks should be
* between 0.25 and 0.5 seconds so we'll ask for something
* in the middle: 0.375 seconds.
*/
rc = tty_check_change(tty);
spin_unlock_irqrestore(&ch->ch_lock, flags);
if (rc)
return rc;
rc = ch_bd_ops->drain(tty, 0);
if (rc)
return -EINTR;
spin_lock_irqsave(&ch->ch_lock, flags);
if (((cmd == TCSBRK) && (!arg)) || (cmd == TCSBRKP))
ch_bd_ops->send_break(ch, 250);
spin_unlock_irqrestore(&ch->ch_lock, flags);
return 0;
case TCSBRKP:
/*
* support for POSIX tcsendbreak()
* According to POSIX.1 spec (7.2.2.1.2) breaks should be
* between 0.25 and 0.5 seconds so we'll ask for something
* in the middle: 0.375 seconds.
*/
rc = tty_check_change(tty);
spin_unlock_irqrestore(&ch->ch_lock, flags);
if (rc)
return rc;
rc = ch_bd_ops->drain(tty, 0);
if (rc)
return -EINTR;
spin_lock_irqsave(&ch->ch_lock, flags);
ch_bd_ops->send_break(ch, 250);
spin_unlock_irqrestore(&ch->ch_lock, flags);
return 0;
case TIOCSBRK:
rc = tty_check_change(tty);
spin_unlock_irqrestore(&ch->ch_lock, flags);
if (rc)
return rc;
rc = ch_bd_ops->drain(tty, 0);
if (rc)
return -EINTR;
spin_lock_irqsave(&ch->ch_lock, flags);
ch_bd_ops->send_break(ch, 250);
spin_unlock_irqrestore(&ch->ch_lock, flags);
return 0;
case TIOCCBRK:
/* Do Nothing */
spin_unlock_irqrestore(&ch->ch_lock, flags);
return 0;
case TIOCGSOFTCAR:
spin_unlock_irqrestore(&ch->ch_lock, flags);