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[Xen-changelog] [xen-unstable] x86: __pirq_guest_eoi() must check it is
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| Subject: | [Xen-changelog] [xen-unstable] x86: __pirq_guest_eoi() must check it is called for a fully |
| From: | Xen patchbot-unstable <patchbot@xxxxxxx> |
| Date: | Wed, 30 Mar 2011 21:50:14 +0100 |
| Delivery-date: | Wed, 30 Mar 2011 13:51:56 -0700 |
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# HG changeset patch
# User Keir Fraser <keir@xxxxxxx>
# Date 1301132521 0
# Node ID 48dac730a93b27ff60a340564e9a7afd7f9385f4
# Parent 8f001d864fefac689b7662bc9979eaddf4fd6e9c
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>
---
diff -r 8f001d864fef -r 48dac730a93b xen/arch/x86/irq.c
--- a/xen/arch/x86/irq.c Sat Mar 26 09:30:38 2011 +0000
+++ b/xen/arch/x86/irq.c Sat Mar 26 09:42:01 2011 +0000
@@ -1022,6 +1022,12 @@
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;
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