staging: vt6656: convert RXvWorkItem to work queue

Tasklet to workqueue.
ReadWorkItem -> read_work_item

Reduce atomic area of driver.
Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vt6656/device.h

@@ -384,7 +384,7 @@ struct vnt_private {
 
 	struct tasklet_struct CmdWorkItem;
 	struct tasklet_struct EventWorkItem;
-	struct tasklet_struct ReadWorkItem;
+	struct work_struct read_work_item;
 	struct tasklet_struct RxMngWorkItem;
 
 	u32 rx_buf_sz;

drivers/staging/vt6656/dpc.c

@@ -1332,8 +1332,10 @@ static int s_bAPModeRxData(struct vnt_private *pDevice, struct sk_buff *skb,
     return true;
 }
 
-void RXvWorkItem(struct vnt_private *pDevice)
+void RXvWorkItem(struct work_struct *work)
 {
+	struct vnt_private *pDevice =
+		container_of(work, struct vnt_private, read_work_item);
 	int ntStatus;
 	struct vnt_rcb *pRCB = NULL;
 
@@ -1383,7 +1385,7 @@ void RXvFreeRCB(struct vnt_rcb *pRCB, int bReAllocSkb)
         (pDevice->bIsRxWorkItemQueued == false) ) {
 
         pDevice->bIsRxWorkItemQueued = true;
-        tasklet_schedule(&pDevice->ReadWorkItem);
+	schedule_work(&pDevice->read_work_item);
     }
     DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"<----RXFreeRCB %d %d\n",pDevice->NumRecvFreeList, pDevice->NumRecvMngList);
 }

drivers/staging/vt6656/dpc.h

@@ -32,7 +32,7 @@
 #include "device.h"
 #include "wcmd.h"
 
-void RXvWorkItem(void *Context);
+void RXvWorkItem(struct work_struct *work);
 
 void RXvMngWorkItem(void *Context);
 

drivers/staging/vt6656/main_usb.c

@@ -704,6 +704,7 @@ vt6656_probe(struct usb_interface *intf, const struct usb_device_id *id)
 	spin_lock_init(&pDevice->lock);
 	INIT_DELAYED_WORK(&pDevice->run_command_work, vRunCommand);
 	INIT_DELAYED_WORK(&pDevice->second_callback_work, BSSvSecondCallBack);
+	INIT_WORK(&pDevice->read_work_item, RXvWorkItem);
 
 	pDevice->tx_80211 = device_dma0_tx_80211;
 	pDevice->vnt_mgmt.pAdapter = (void *) pDevice;
@@ -984,7 +985,6 @@ static int  device_open(struct net_device *dev)
 
     vMgrObjectInit(pDevice);
     tasklet_init(&pDevice->RxMngWorkItem, (void *)RXvMngWorkItem, (unsigned long)pDevice);
-    tasklet_init(&pDevice->ReadWorkItem, (void *)RXvWorkItem, (unsigned long)pDevice);
     tasklet_init(&pDevice->EventWorkItem, (void *)INTvWorkItem, (unsigned long)pDevice);
 
 	schedule_delayed_work(&pDevice->second_callback_work, HZ);
@@ -1004,7 +1004,7 @@ static int  device_open(struct net_device *dev)
      pDevice->bWPASuppWextEnabled = false;
     pDevice->byReAssocCount = 0;
 
-    RXvWorkItem(pDevice);
+	schedule_work(&pDevice->read_work_item);
     INTvWorkItem(pDevice);
 
     /* if WEP key already set by iwconfig but device not yet open */
@@ -1092,7 +1092,9 @@ static int device_close(struct net_device *dev)
         del_timer(&pDevice->TimerSQ3Tmax3);
     }
     tasklet_kill(&pDevice->RxMngWorkItem);
-    tasklet_kill(&pDevice->ReadWorkItem);
+
+	cancel_work_sync(&pDevice->read_work_item);
+
     tasklet_kill(&pDevice->EventWorkItem);
 
    pDevice->bRoaming = false;