From: Paul Durrant <paul.durrant@citrix.com>
Date: Tue, 27 Jan 2015 14:02:18 +0000 (+0000)
Subject: EVTCHN Bind method should check that the channel is active
X-Git-Tag: 8.1.0-rc1~76
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=cfde5a8163930ccdce030f02e684640406702e1e;p=pvdrivers%2Fwin%2Fxenbus.git

EVTCHN Bind method should check that the channel is active

Any method which performs ABI operations should check whether the channel is
active.

Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
---

diff --git a/src/xenbus/evtchn.c b/src/xenbus/evtchn.c
index 16060aa..acbb84c 100644
--- a/src/xenbus/evtchn.c
+++ b/src/xenbus/evtchn.c
@@ -513,6 +513,9 @@ EvtchnBind(
 
     KeAcquireSpinLock(&Channel->Lock, &Irql);
 
+    if (!Channel->Active)
+        goto done;
+
     if (Channel->Cpu == Cpu)
         goto done;