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 	kthread_complete_and_exit(&dev->rx_thread.completion, 0);
60 }
61 
62