tty: rework break handling
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>
diff --git a/drivers/char/rocket.c b/drivers/char/rocket.c
index e670eae..584d791 100644
--- a/drivers/char/rocket.c
+++ b/drivers/char/rocket.c
@@ -1236,13 +1236,13 @@
}
}
-static void rp_break(struct tty_struct *tty, int break_state)
+static int rp_break(struct tty_struct *tty, int break_state)
{
struct r_port *info = (struct r_port *) tty->driver_data;
unsigned long flags;
if (rocket_paranoia_check(info, "rp_break"))
- return;
+ return -EINVAL;
spin_lock_irqsave(&info->slock, flags);
if (break_state == -1)
@@ -1250,6 +1250,7 @@
else
sClrBreak(&info->channel);
spin_unlock_irqrestore(&info->slock, flags);
+ return 0;
}
/*