[Xen-changelog] [xen-4.0-testing] x86: __pirq_guest_eoi() must check it is called for a fully

[Xen patchbot-4.0-testing <patchbot@xxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir@xxxxxxx>
# Date 1301756901 -3600
# Node ID fa37cf7f6ceca75621c08f169b2af1145ce33d6c
# Parent  c3bb17be91d7392c3608adafd316313578a98a02
x86: __pirq_guest_eoi() must check it is called for a fully
guest-bound irq before accessing desc->action.

Signed-off-by: Keir Fraser <keir@xxxxxxx>
xen-unstable changeset:   23103:48dac730a93b
xen-unstable date:        Sat Mar 26 09:42:01 2011 +0000
---


diff -r c3bb17be91d7 -r fa37cf7f6cec xen/arch/x86/irq.c
--- a/xen/arch/x86/irq.c        Sat Mar 26 09:34:08 2011 +0000
+++ b/xen/arch/x86/irq.c        Sat Apr 02 16:08:21 2011 +0100
@@ -1012,6 +1012,12 @@
     if ( desc == NULL )
         return;
 
+    if ( !(desc->status & IRQ_GUEST) )
+    {
+        spin_unlock_irq(&desc->lock);
+        return;
+    }
+
     action = (irq_guest_action_t *)desc->action;
     irq = desc - irq_desc;
 

_______________________________________________
Xen-changelog mailing list
Xen-changelog@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-changelog