[PATCH 6.6.y 2/2] xhci: dbgtty: fix device unregister: fixup

[Sasha Levin <sashal@kernel.org>]

From: Łukasz Bartosik <ukaszb@chromium.org>

[ Upstream commit 74098cc06e753d3ffd8398b040a3a1dfb65260c0 ]

This fixup replaces tty_vhangup() call with call to
tty_port_tty_vhangup(). Both calls hangup tty device
synchronously however tty_port_tty_vhangup() increases
reference count during the hangup operation using
scoped_guard(tty_port_tty).

Cc: stable <stable@kernel.org>
Fixes: 1f73b8b56cf3 ("xhci: dbgtty: fix device unregister")
Signed-off-by: Łukasz Bartosik <ukaszb@chromium.org>
Link: https://patch.msgid.link/20251127111644.3161386-1-ukaszb@google.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/usb/host/xhci-dbgtty.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/usb/host/xhci-dbgtty.c b/drivers/usb/host/xhci-dbgtty.c
index f2c74e20b572..3bc7bb958524 100644
--- a/drivers/usb/host/xhci-dbgtty.c
+++ b/drivers/usb/host/xhci-dbgtty.c
@@ -522,7 +522,7 @@ static void xhci_dbc_tty_unregister_device(struct xhci_dbc *dbc)
 	 * Hang up the TTY. This wakes up any blocked
 	 * writers and causes subsequent writes to fail.
 	 */
-	tty_vhangup(port->port.tty);
+	tty_port_tty_vhangup(&port->port);
 
 	tty_unregister_device(dbc_tty_driver, port->minor);
 	xhci_dbc_tty_exit_port(port);
-- 
2.51.0