Merge "soc: qcom: glink_bgcom_xprt: Send READ_NOTIFY cmd in FIFO full case"

/* Copyright (c) 2017-2018, The Linux Foundation. All rights reserved.

/* Copyright (c) 2017-2019, The Linux Foundation. All rights reserved.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 and

	mutex_lock(&einfo->write_lock);

	if (glink_bgcom_get_tx_avail(einfo) <= sizeof(cmd)/WORD_SIZE) {

		einfo->tx_resume_needed = true;

		send_tx_blocked_signal(einfo);

		mutex_unlock(&einfo->write_lock);

		srcu_read_unlock(&einfo->use_ref, rcu_id);

		return -EAGAIN;