Add handler to support TTY hangup operation
Signed-off-by: Jagannathan Raman <jag.raman@xxxxxxxxxx>
Reviewed-by: Liam Merwick <liam.merwick@xxxxxxxxxx>
Reviewed-by: Shannon Nelson <shannon.nelson@xxxxxxxxxx>
---
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 f964fb2..67be5a5 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)
--
1.7.1
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