linux/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;
	struct sk_buff *skb;

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

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

			skb = skb_dequeue(&dev->rx_q);
			if (!skb)
				break;
			status = rsi_read_pkt(common, skb->data, 0);
			if (status) {
				rsi_dbg(ERR_ZONE, "%s: Failed To read data",
					__func__);
				break;
			}
			dev_kfree_skb(skb);
		}
	} while (1);

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