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From 262c9bb1e59c2cd561dad1cf9d47c50f07af0e0f Mon Sep 17 00:00:00 2001
From: Hans de Goede <>
Date: Fri, 17 Aug 2012 17:27:08 +0200
Subject: [PATCH] usb-redir: Never return USB_RET_NAK for async handled packets

USB_RET_NAK is not a valid response for async handled packets (and will
trigger an assert as such).

Also drop the warning when receiving a status of cancelled for packets not
cancelled by qemu itself, this can happen when a device gets unredirected
by the usbredir-host while transfers are pending.

Signed-off-by: Hans de Goede <>
Signed-off-by: Gerd Hoffmann <>
(cherry picked from commit 181133404f520fab40a3ad40d935d91cf3cf546c)

Signed-off-by: Michael Roth <>
 hw/usb/redirect.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/hw/usb/redirect.c b/hw/usb/redirect.c
index 10b4fbb..7f3719b 100644
--- a/hw/usb/redirect.c
+++ b/hw/usb/redirect.c
@@ -1028,11 +1028,14 @@ static int usbredir_handle_status(USBRedirDevice *dev,
     case usb_redir_stall:
         return USB_RET_STALL;
     case usb_redir_cancelled:
-        WARNING("returning cancelled packet to HC?\n");
-        return USB_RET_NAK;
+        /*
+         * When the usbredir-host unredirects a device, it will report a status
+         * of cancelled for all pending packets, followed by a disconnect msg.
+         */
+        return USB_RET_IOERROR;
     case usb_redir_inval:
         WARNING("got invalid param error from usb-host?\n");
-        return USB_RET_NAK;
+        return USB_RET_IOERROR;
     case usb_redir_babble:
         return USB_RET_BABBLE;
     case usb_redir_ioerror: