USB: fix minor nit in usbfs checking

One minor nit did show up, though.  The patch below
seems to make more sense than the code does without it.

Signed-off-by: Mark Lord <mlord@pobox.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>


diff --git a/drivers/usb/core/devio.c b/drivers/usb/core/devio.c
index c85e293..26fece1 100644
--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -1317,7 +1317,7 @@
 	if (__get_user(uptr, &uurb->buffer))
 		return -EFAULT;
 	kurb->buffer = compat_ptr(uptr);
-	if (__get_user(uptr, &uurb->buffer))
+	if (__get_user(uptr, &uurb->usercontext))
 		return -EFAULT;
 	kurb->usercontext = compat_ptr(uptr);