From 712db0f3013425aeb4e29fb4f03315c466b696c1 Mon Sep 17 00:00:00 2001
From: Jan Beulich <JBeulich@suse.com>
Date: Mon, 7 Nov 2016 08:29:15 -0700
Subject: [PATCH] IOMMU: release lock on new exit path

This was overlooked in 7b2842a414 ("IOMMU: replace ASSERT()s checking
for NULL").

Reported-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Release-acked-by: Wei Liu <wei.liu2@citrix.com>
---
 xen/drivers/passthrough/io.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/xen/drivers/passthrough/io.c b/xen/drivers/passthrough/io.c
index 574d22a0cd..080183ea31 100644
--- a/xen/drivers/passthrough/io.c
+++ b/xen/drivers/passthrough/io.c
@@ -168,6 +168,7 @@ static void pt_irq_time_out(void *data)
     if ( unlikely(!dpci) )
     {
         ASSERT_UNREACHABLE();
+        spin_unlock(&irq_map->dom->event_lock);
         return;
     }
     list_for_each_entry ( digl, &irq_map->digl_list, list )
-- 
2.30.2