staging: vt6656: usbpipe.c PIPEnsControlOut use usb_control_msg

Now that this fucntion is nolonger atomic change to usb_control_msg

Return STATUS_FAILURE if ntStatus less than wLength.

Remove fMP_CONTROL_WRITES flag
Signed-off-by: Malcolm Priestley <tvboxspy@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vt6656/device.h

@@ -744,7 +744,6 @@ struct vnt_private {
 #define fMP_POST_READS                      0x00000100
 #define fMP_POST_WRITES                     0x00000200
 #define fMP_CONTROL_READS                   0x00000400
-#define fMP_CONTROL_WRITES                  0x00000800
 
 #define MP_SET_FLAG(_M, _F)             ((_M)->Flags |= (_F))
 #define MP_CLEAR_FLAG(_M, _F)            ((_M)->Flags &= ~(_F))

drivers/staging/vt6656/main_usb.c

@@ -965,7 +965,6 @@ static int  device_open(struct net_device *dev)
 
     MP_CLEAR_FLAG(pDevice, fMP_DISCONNECTED);
     MP_CLEAR_FLAG(pDevice, fMP_CONTROL_READS);
-    MP_CLEAR_FLAG(pDevice, fMP_CONTROL_WRITES);
     MP_SET_FLAG(pDevice, fMP_POST_READS);
     MP_SET_FLAG(pDevice, fMP_POST_WRITES);
 

drivers/staging/vt6656/usbpipe.c

@@ -64,7 +64,6 @@ static void s_nsInterruptUsbIoCompleteRead(struct urb *urb);
 static void s_nsBulkInUsbIoCompleteRead(struct urb *urb);
 static void s_nsBulkOutIoCompleteWrite(struct urb *urb);
 static void s_nsControlInUsbIoCompleteRead(struct urb *urb);
-static void s_nsControlInUsbIoCompleteWrite(struct urb *urb);
 
 int PIPEnsControlOutAsyn(struct vnt_private *pDevice, u8 byRequest,
 	u16 wValue, u16 wIndex, u16 wLength, u8 *pbyBuffer)
@@ -74,9 +73,6 @@ int PIPEnsControlOutAsyn(struct vnt_private *pDevice, u8 byRequest,
     if (pDevice->Flags & fMP_DISCONNECTED)
         return STATUS_FAILURE;
 
-    if (pDevice->Flags & fMP_CONTROL_WRITES)
-        return STATUS_FAILURE;
-
     if (in_interrupt()) {
         DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"in_interrupt return ..byRequest %x\n", byRequest);
         return STATUS_FAILURE;
@@ -109,67 +105,22 @@ int PIPEnsControlOutAsyn(struct vnt_private *pDevice, u8 byRequest,
 
 int PIPEnsControlOut(struct vnt_private *pDevice, u8 byRequest, u16 wValue,
 		u16 wIndex, u16 wLength, u8 *pbyBuffer)
-		__releases(&pDevice->lock)
-		__acquires(&pDevice->lock)
 {
 	int ntStatus = 0;
-	int ii;
 
 	if (pDevice->Flags & fMP_DISCONNECTED)
 		return STATUS_FAILURE;
 
-    if (pDevice->Flags & fMP_CONTROL_WRITES)
-        return STATUS_FAILURE;
-
-	if (pDevice->Flags & fMP_CONTROL_READS)
-		return STATUS_FAILURE;
-
-	if (pDevice->pControlURB->hcpriv)
-		return STATUS_FAILURE;
-
 	mutex_lock(&pDevice->usb_lock);
 
-	MP_SET_FLAG(pDevice, fMP_CONTROL_WRITES);
-
-	pDevice->sUsbCtlRequest.bRequestType = 0x40;
-	pDevice->sUsbCtlRequest.bRequest = byRequest;
-	pDevice->sUsbCtlRequest.wValue = cpu_to_le16p(&wValue);
-	pDevice->sUsbCtlRequest.wIndex = cpu_to_le16p(&wIndex);
-	pDevice->sUsbCtlRequest.wLength = cpu_to_le16p(&wLength);
-	pDevice->pControlURB->transfer_flags |= URB_ASYNC_UNLINK;
-    pDevice->pControlURB->actual_length = 0;
-    // Notice, pbyBuffer limited point to variable buffer, can't be constant.
-  	usb_fill_control_urb(pDevice->pControlURB, pDevice->usb,
-			 usb_sndctrlpipe(pDevice->usb , 0), (char *) &pDevice->sUsbCtlRequest,
-			 pbyBuffer, wLength, s_nsControlInUsbIoCompleteWrite, pDevice);
+	ntStatus = usb_control_msg(pDevice->usb,
+		usb_sndctrlpipe(pDevice->usb, 0), byRequest, 0x40, wValue,
+			wIndex, pbyBuffer, wLength, USB_CTL_WAIT);
 
-	ntStatus = usb_submit_urb(pDevice->pControlURB, GFP_ATOMIC);
-	if (ntStatus != 0) {
-		DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO
-			"control send request submission failed: %d\n",
-				ntStatus);
-		MP_CLEAR_FLAG(pDevice, fMP_CONTROL_WRITES);
 	mutex_unlock(&pDevice->usb_lock);
-		return STATUS_FAILURE;
-	}
-
-    for (ii = 0; ii <= USB_CTL_WAIT; ii ++) {
 
-	if (pDevice->Flags & fMP_CONTROL_WRITES)
-		mdelay(1);
-        else
-		break;
-
-        if (ii >= USB_CTL_WAIT) {
-		DBG_PRT(MSG_LEVEL_DEBUG,
-			KERN_INFO "control send request submission timeout\n");
-            MP_CLEAR_FLAG(pDevice, fMP_CONTROL_WRITES);
-	    mutex_unlock(&pDevice->usb_lock);
+	if (ntStatus < (int)wLength)
 		return STATUS_FAILURE;
-        }
-    }
-
-	mutex_unlock(&pDevice->usb_lock);
 
 	return STATUS_SUCCESS;
 }
@@ -188,9 +139,6 @@ int PIPEnsControlIn(struct vnt_private *pDevice, u8 byRequest, u16 wValue,
     if (pDevice->Flags & fMP_CONTROL_READS)
 	return STATUS_FAILURE;
 
-	if (pDevice->Flags & fMP_CONTROL_WRITES)
-		return STATUS_FAILURE;
-
 	if (pDevice->pControlURB->hcpriv)
 		return STATUS_FAILURE;
 
@@ -239,27 +187,6 @@ int PIPEnsControlIn(struct vnt_private *pDevice, u8 byRequest, u16 wValue,
     return ntStatus;
 }
 
-static void s_nsControlInUsbIoCompleteWrite(struct urb *urb)
-{
-	struct vnt_private *pDevice = (struct vnt_private *)urb->context;
-
-	pDevice = urb->context;
-	switch (urb->status) {
-	case 0:
-		break;
-	case -EINPROGRESS:
-		DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"ctrl write urb status EINPROGRESS%d\n", urb->status);
-		break;
-	case -ENOENT:
-		DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"ctrl write urb status ENOENT %d\n", urb->status);
-		break;
-	default:
-		DBG_PRT(MSG_LEVEL_DEBUG, KERN_INFO"ctrl write urb status %d\n", urb->status);
-	}
-
-    MP_CLEAR_FLAG(pDevice, fMP_CONTROL_WRITES);
-}
-
 /*
  * Description:
  *      Complete function of usb Control callback