linux_kernel/drivers/net/wireless/rsi/rsi_91x_usb_ops.c

/**
 * Copyright (c) 2014 Redpine Signals Inc.
 *
 * Permission to use, copy, modify, and/or distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 */

#include <linux/firmware.h>
#include "rsi_usb.h"

/**
 * rsi_usb_rx_thread() - This is a kernel thread to receive the packets from
 *			 the USB device.
 * @common: Pointer to the driver private structure.
 *
 * Return: None.
 */
void rsi_usb_rx_thread(struct rsi_common *common)
{
	struct rsi_hw *adapter = common->priv;
	struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
	int status;

	do {
		rsi_wait_event(&dev->rx_thread.event, EVENT_WAIT_FOREVER);

		if (atomic_read(&dev->rx_thread.thread_done))
			goto out;

		mutex_lock(&common->rx_lock);
		status = rsi_read_pkt(common, 0);
		if (status) {
			rsi_dbg(ERR_ZONE, "%s: Failed To read data", __func__);
			mutex_unlock(&common->rx_lock);
			return;
		}
		mutex_unlock(&common->rx_lock);
		rsi_reset_event(&dev->rx_thread.event);
		if (adapter->rx_urb_submit(adapter)) {
			rsi_dbg(ERR_ZONE,
				"%s: Failed in urb submission", __func__);
			return;
		}
	} while (1);

out:
	rsi_dbg(INFO_ZONE, "%s: Terminated thread\n", __func__);
	complete_and_exit(&dev->rx_thread.completion, 0);
}