From b413f00ab1a99ccb239fc5afd4b8e0c7ada6c9db Mon Sep 17 00:00:00 2001 From: Al Viro Date: Wed, 12 Sep 2018 18:32:47 -0400 Subject: [PATCH] dgnc: break-related ioctls won't reach ->ioctl() kill the dead code, especially since ->break_ctl() will do the right thing anyway. Signed-off-by: Al Viro --- drivers/staging/dgnc/dgnc_tty.c | 75 --------------------------------- 1 file changed, 75 deletions(-) diff --git a/drivers/staging/dgnc/dgnc_tty.c b/drivers/staging/dgnc/dgnc_tty.c index 9accaa705820..040af55e9e68 100644 --- a/drivers/staging/dgnc/dgnc_tty.c +++ b/drivers/staging/dgnc/dgnc_tty.c @@ -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); -- 2.25.1