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tty: rework break handling

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Some hardware needs to do break handling itself and may have partial
support only. Make break_ctl return an error code. Add a tty driver flag
so you can indicate driver hardware side break support.

Signed-off-by: Alan Cox <alan@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alan Cox
2008-07-22 11:18:03 +01:00
committed by Linus Torvalds
parent abbe629ae4
commit 9e98966c7b
20 changed files with 97 additions and 84 deletions
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3
drivers/serial/serial_core.c
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@ -934,7 +934,7 @@ uart_tiocmset(struct tty_struct *tty, struct file *file,
return ret;
}
static void uart_break_ctl(struct tty_struct *tty, int break_state)
static int uart_break_ctl(struct tty_struct *tty, int break_state)
{
struct uart_state *state = tty->driver_data;
struct uart_port *port = state->port;
@ -945,6 +945,7 @@ static void uart_break_ctl(struct tty_struct *tty, int break_state)
port->ops->break_ctl(port, break_state);
mutex_unlock(&state->mutex);
return 0;
}
static int uart_do_autoconfig(struct uart_state *state)