PERFORCE change 157608 for review

[Hans Petter Selasky]

http://perforce.freebsd.org/chv.cgi?CH=157608

Change 157608 by hselasky at hselasky_laptop001 on 2009/02/12 20:02:21

	
	USB CORE: Make usb2_transfer_pending() NULL safe.

Affected files ...

.. //depot/projects/usb/src/sys/dev/usb2/core/usb2_transfer.c#43 edit

Differences ...

==== //depot/projects/usb/src/sys/dev/usb2/core/usb2_transfer.c#43 (text+ko) ====

@@ -1690,6 +1690,10 @@
 	struct usb2_xfer_root *info;
 	struct usb2_xfer_queue *pq;
 
+	if (xfer == NULL) {
+		/* transfer is gone */
+		return (0);
+	}
 	USB_XFER_LOCK_ASSERT(xfer, MA_OWNED);
 
 	if (xfer->flags_int.transferring) {