staging: octeon-usb: cvmx_usb_submit_control: get params from urb

Get the transfer parameters from urb.
Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/octeon-usb/octeon-hcd.c

@@ -2474,45 +2474,27 @@ static int cvmx_usb_submit_interrupt(struct cvmx_usb_state *usb,
  * @usb:	    USB device state populated by cvmx_usb_initialize().
  * @pipe_handle:
  *		    Handle to the pipe for the transfer.
- * @control_header:
- *		    USB 8 byte control header physical address.
- *		    Note that this is NOT A POINTER, but the
- *		    full 64bit physical address of the buffer.
- * @buffer:	    Physical address of the data buffer in
- *		    memory. Note that this is NOT A POINTER, but
- *		    the full 64bit physical address of the
- *		    buffer. This may be zero if buffer_length is
- *		    zero.
- * @buffer_length:
- *		    Length of buffer in bytes.
- * @urb:	    URB returned when the callback is called.
+ * @urb:	    URB.
  *
  * Returns: A submitted transaction handle or negative on
  *	    failure. Negative values are error codes.
  */
-static int cvmx_usb_submit_control(struct cvmx_usb_state *usb,
-				   int pipe_handle, uint64_t control_header,
-				   uint64_t buffer, int buffer_length,
+static int cvmx_usb_submit_control(struct cvmx_usb_state *usb, int pipe_handle,
 				   struct urb *urb)
 {
 	int submit_handle;
+	int buffer_length = urb->transfer_buffer_length;
+	uint64_t control_header = urb->setup_dma;
 	union cvmx_usb_control_header *header =
 		cvmx_phys_to_ptr(control_header);
 
 	/* Pipe handle checking is done later in a common place */
-	if (unlikely(!control_header))
-		return -EINVAL;
-	/* Some drivers send a buffer with a zero length. God only knows why */
-	if (unlikely(buffer && (buffer_length < 0)))
-		return -EINVAL;
-	if (unlikely(!buffer && (buffer_length != 0)))
-		return -EINVAL;
 	if ((header->s.request_type & 0x80) == 0)
 		buffer_length = le16_to_cpu(header->s.length);
 
 	submit_handle = __cvmx_usb_submit_transaction(usb, pipe_handle,
 						      CVMX_USB_TRANSFER_CONTROL,
-						      buffer,
+						      urb->transfer_dma,
 						      buffer_length,
 						      control_header,
 						      0, /* iso_start_frame */
@@ -3471,10 +3453,7 @@ static int octeon_usb_urb_enqueue(struct usb_hcd *hcd,
 		dev_dbg(dev, "Submit control to %d.%d\n",
 			usb_pipedevice(urb->pipe), usb_pipeendpoint(urb->pipe));
 		submit_handle = cvmx_usb_submit_control(&priv->usb, pipe_handle,
-					    urb->setup_dma,
-					    urb->transfer_dma,
-					    urb->transfer_buffer_length,
-					    urb);
+							urb);
 		break;
 	case PIPE_BULK:
 		dev_dbg(dev, "Submit bulk to %d.%d\n",