Merge "soc: qcom: glink_pkt: Add mutex in glink_pkt_read"

/* Copyright (c) 2014-2016, The Linux Foundation. All rights reserved.

/* Copyright (c) 2014-2017, 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

		return -ENETRESET;

	}

	mutex_lock(&devp->ch_lock);

	if (!glink_rx_intent_exists(devp->handle, count)) {

		ret  = glink_queue_rx_intent(devp->handle, devp, count);

		if (ret) {

			GLINK_PKT_ERR("%s: failed to queue_rx_intent ret[%d]\n",

					__func__, ret);

			mutex_unlock(&devp->ch_lock);

			return ret;

		}

	}

	mutex_unlock(&devp->ch_lock);

	GLINK_PKT_INFO("Begin %s on glink_pkt_dev id:%d buffer_size %zu\n",

		__func__, devp->i, count);