diff options
Diffstat (limited to 'drivers/tty/vcc.c')
| -rw-r--r-- | drivers/tty/vcc.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/drivers/tty/vcc.c b/drivers/tty/vcc.c index f964fb20e4ba..67be5a57c1b5 100644 --- a/drivers/tty/vcc.c +++ b/drivers/tty/vcc.c @@ -804,9 +804,50 @@ static void vcc_close(struct tty_struct *tty, struct file *vcc_file) tty_port_close(tty->port, tty, vcc_file); } +static void vcc_ldc_hup(struct vcc_port *port) +{ + unsigned long flags; + + spin_lock_irqsave(&port->lock, flags); + + if (vcc_send_ctl(port, VCC_CTL_HUP) < 0) + vcc_kick_tx(port); + + spin_unlock_irqrestore(&port->lock, flags); +} + +static void vcc_hangup(struct tty_struct *tty) +{ + struct vcc_port *port; + + if (unlikely(!tty)) { + pr_err("VCC: hangup: Invalid TTY handle\n"); + return; + } + + port = vcc_get_ne(tty->index); + if (unlikely(!port)) { + pr_err("VCC: hangup: Failed to find VCC port\n"); + return; + } + + if (unlikely(!tty->port)) { + pr_err("VCC: hangup: TTY port not found\n"); + vcc_put(port, false); + return; + } + + vcc_ldc_hup(port); + + vcc_put(port, false); + + tty_port_hangup(tty->port); +} + static const struct tty_operations vcc_ops = { .open = vcc_open, .close = vcc_close, + .hangup = vcc_hangup, }; #define VCC_TTY_FLAGS (TTY_DRIVER_DYNAMIC_DEV | TTY_DRIVER_REAL_RAW) |