From 98861f512bbd8789bd7935a75316d3278be23a0a Mon Sep 17 00:00:00 2001
From: Gerd Hoffmann <kraxel@redhat.com>
Date: Tue, 10 Jan 2012 17:33:02 +0100
Subject: usb: handle dev == NULL in usb_handle_packet()

Allow passing in a NULL pointer, return USB_RET_NODEV in that case.
Removes the burden to to a NULL pointer check from the callers.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 hw/usb.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'hw/usb.c')

diff --git a/hw/usb.c b/hw/usb.c
index bacdc81bfc..9976f81bd7 100644
--- a/hw/usb.c
+++ b/hw/usb.c
@@ -315,6 +315,10 @@ int usb_handle_packet(USBDevice *dev, USBPacket *p)
 {
     int ret;
 
+    if (dev == NULL) {
+        return USB_RET_NODEV;
+    }
+
     assert(p->owner == NULL);
     ret = usb_device_handle_packet(dev, p);
     if (ret == USB_RET_ASYNC) {
-- 
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