From af008eee80bda6de4ceba3325b568da3587714e0 Mon Sep 17 00:00:00 2001
From: Aleksey Bragin <aleksey@reactos.org>
Date: Tue, 25 Nov 2008 15:57:03 +0000
Subject: [PATCH] Daniel Zimmerman - First check for NULL before reference a
 member in it. See issue #3907 for more details.

svn path=/trunk/; revision=37636
---
 reactos/drivers/usb/nt4compat/usbdriver/ohci.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/reactos/drivers/usb/nt4compat/usbdriver/ohci.c b/reactos/drivers/usb/nt4compat/usbdriver/ohci.c
index e68592e2845..0d02b9ecbce 100644
--- a/reactos/drivers/usb/nt4compat/usbdriver/ohci.c
+++ b/reactos/drivers/usb/nt4compat/usbdriver/ohci.c
@@ -1428,10 +1428,11 @@ ohci_generic_urb_completion(PURB purb, PVOID context)
     if (old_irql < DISPATCH_LEVEL)
         KeRaiseIrql(DISPATCH_LEVEL, &old_irql);
 
-    pdev = purb->pdev;
     if (purb == NULL)
         goto LBL_LOWER_IRQL;
 
+    pdev = purb->pdev;
+
     if (pdev == NULL)
         goto LBL_LOWER_IRQL;