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[ Upstream commit74098cc06e] 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:1f73b8b56c("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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>