From cf5f382d7a819b4f9521da2e6f5e48416f60d77e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Marek=20Marczykowski-G=C3=B3recki?=
 <marmarek@invisiblethingslab.com>
Date: Wed, 1 Jun 2016 14:03:01 +0200
Subject: [PATCH] udev: ignore usbip-connected USB devices

Those devices are most likely attached using "PV USB" from another
domain, so it doesn't make sense to list them as available for further
passthrough.

QubesOS/qubes-issues#531
---
 udev/udev-usb-add-change | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/udev/udev-usb-add-change b/udev/udev-usb-add-change
index d7a3b64..3e9da35 100755
--- a/udev/udev-usb-add-change
+++ b/udev/udev-usb-add-change
@@ -33,6 +33,12 @@ else
 	exit 0
 fi
 
+# ignore usbip-connected devices, as most likely already passed through from
+# another VM
+if [ "`echo $DEVPATH | cut -d / -f 2-4`" = "devices/platform/vhci_hcd" ]; then
+    exit 0
+fi
+
 QDB_KEY="/qubes-usb-devices/$XSNAME"
 
 qubesdb-write "$QDB_KEY/desc" "$DESC"