1 /**
2 * Copyright (c) 2014 Redpine Signals Inc.
3 *
4 * Permission to use, copy, modify, and/or distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 *
16 */
17
18 #include <linux/firmware.h>
19 #include "rsi_usb.h"
20
21 /**
22 * rsi_usb_rx_thread() - This is a kernel thread to receive the packets from
23 * the USB device.
24 * @common: Pointer to the driver private structure.
25 *
26 * Return: None.
27 */
28 void rsi_usb_rx_thread(struct rsi_common *common)
29 {
30 struct rsi_hw *adapter = common->priv;
31 struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
32 int status;
33 struct sk_buff *skb;
34
35 do {
36 rsi_wait_event(&dev->rx_thread.event, EVENT_WAIT_FOREVER);
37 rsi_reset_event(&dev->rx_thread.event);
38
39 while (true) {
40 if (atomic_read(&dev->rx_thread.thread_done))
41 goto out;
42
43 skb = skb_dequeue(&dev->rx_q);
44 if (!skb)
45 break;
46 status = rsi_read_pkt(common, skb->data, 0);
47 if (status) {
48 rsi_dbg(ERR_ZONE, "%s: Failed To read data",
49 __func__);
50 break;
51 }
52 dev_kfree_skb(skb);
53 }
54 } while (1);
55
56 out:
57 rsi_dbg(INFO_ZONE, "%s: Terminated thread\n", __func__);
58 skb_queue_purge(&dev->rx_q);
59 complete_and_exit(&dev->rx_thread.completion, 0);
60 }
61