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sparc64: vcc: Add hangup TTY operation 

Add handler to support TTY hangup operation

Signed-off-by: Jagannathan Raman <jag.raman@oracle.com>
Reviewed-by: Liam Merwick <liam.merwick@oracle.com>
Reviewed-by: Shannon Nelson <shannon.nelson@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jag Raman 2017-08-15 17:03:05 -04:00 committed by David S. Miller
parent 63a7174484
commit 6a3ff25bc6
1 changed files with 41 additions and 0 deletions
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41
drivers/tty/vcc.c
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@ -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)