mwifiex: remove unnecessary rx_q lock

SKB lists have their own lock. So this lock is not needed.
Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/mwifiex/init.c

@@ -447,7 +447,6 @@ int mwifiex_init_lock_list(struct mwifiex_adapter *adapter)
 	spin_lock_init(&adapter->cmd_free_q_lock);
 	spin_lock_init(&adapter->cmd_pending_q_lock);
 	spin_lock_init(&adapter->scan_pending_q_lock);
-	spin_lock_init(&adapter->rx_q_lock);
 	spin_lock_init(&adapter->rx_proc_lock);
 
 	skb_queue_head_init(&adapter->usb_rx_data_q);

drivers/net/wireless/mwifiex/main.h

@@ -764,8 +764,6 @@ struct mwifiex_adapter {
 	struct list_head scan_pending_q;
 	/* spin lock for scan_pending_q */
 	spinlock_t scan_pending_q_lock;
-	/* spin lock for RX queue */
-	spinlock_t rx_q_lock;
 	/* spin lock for RX processing routine */
 	spinlock_t rx_proc_lock;
 	struct sk_buff_head usb_rx_data_q;

drivers/net/wireless/mwifiex/pcie.c

@@ -1237,7 +1237,6 @@ static int mwifiex_pcie_process_recv_data(struct mwifiex_adapter *adapter)
 	struct sk_buff *skb_tmp = NULL;
 	struct mwifiex_pcie_buf_desc *desc;
 	struct mwifiex_pfu_buf_desc *desc2;
-	unsigned long flags;
 
 	if (!mwifiex_pcie_ok_to_access_hw(adapter))
 		mwifiex_pm_wakeup_card(adapter);
@@ -1289,10 +1288,7 @@ static int mwifiex_pcie_process_recv_data(struct mwifiex_adapter *adapter)
 				card->rxbd_rdptr, wrptr, rx_len);
 			skb_pull(skb_data, INTF_HEADER_LEN);
 			if (adapter->rx_work_enabled) {
-				spin_lock_irqsave(&adapter->rx_q_lock, flags);
 				skb_queue_tail(&adapter->rx_data_q, skb_data);
-				spin_unlock_irqrestore(&adapter->rx_q_lock,
-						       flags);
 				adapter->data_received = true;
 				atomic_inc(&adapter->rx_pending);
 			} else {

drivers/net/wireless/mwifiex/sdio.c

@@ -1039,7 +1039,6 @@ static int mwifiex_decode_rx_packet(struct mwifiex_adapter *adapter,
 				    struct sk_buff *skb, u32 upld_typ)
 {
 	u8 *cmd_buf;
-	unsigned long flags;
 	__le16 *curr_ptr = (__le16 *)skb->data;
 	u16 pkt_len = le16_to_cpu(*curr_ptr);
 
@@ -1050,9 +1049,7 @@ static int mwifiex_decode_rx_packet(struct mwifiex_adapter *adapter,
 	case MWIFIEX_TYPE_DATA:
 		dev_dbg(adapter->dev, "info: --- Rx: Data packet ---\n");
 		if (adapter->rx_work_enabled) {
-			spin_lock_irqsave(&adapter->rx_q_lock, flags);
 			skb_queue_tail(&adapter->rx_data_q, skb);
-			spin_unlock_irqrestore(&adapter->rx_q_lock, flags);
 			adapter->data_received = true;
 			atomic_inc(&adapter->rx_pending);
 		} else {