Merge "TTY: msm_smd_tty: Handle tty port registration failure"

/* arch/arm/mach-msm/smd_tty.c

 *

 * Copyright (C) 2007 Google, Inc.

 * Copyright (c) 2009-2014, The Linux Foundation. All rights reserved.

 * Copyright (c) 2009-2015, The Linux Foundation. All rights reserved.

 * Author: Brian Swetland <swetland@google.com>

 *

 * This software is licensed under the terms of the GNU General Public

	port->ops = &smd_tty_port_ops;

	smd_tty[idx].device_ptr = tty_port_register_device(port, smd_tty_driver,

							   idx, NULL);

	if (IS_ERR_OR_NULL(smd_tty[idx].device_ptr)) {

		SMD_TTY_ERR("%s: Unable to register tty port %s reason %d\n",

				__func__,

				smd_tty[idx].ch_name,

				PTR_ERR_OR_ZERO(smd_tty[idx].device_ptr));

		return;

	}

	init_completion(&smd_tty[idx].ch_allocated);

	mutex_init(&smd_tty[idx].open_lock_lha1);

	spin_lock_init(&smd_tty[idx].reset_lock_lha2);