From d549db5a732ef2ec145b84c5008a7585cf17cf67 Mon Sep 17 00:00:00 2001
From: Glauber Costa <glommer@redhat.com>
Date: Wed, 7 Oct 2009 16:38:03 -0300
Subject: unlock iothread mutex before running kvm ioctl

Without this, kvm will hold the mutex while it issues its run ioctl,
and never be able to step out of it, causing a deadlock.

Patchworks-ID: 35359
Signed-off-by: Glauber Costa <glommer@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
---
 kvm-all.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'kvm-all.c')

diff --git a/kvm-all.c b/kvm-all.c
index 5ea0dd8b1e..48ae26caed 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -605,7 +605,9 @@ int kvm_cpu_exec(CPUState *env)
         }
 
         kvm_arch_pre_run(env, run);
+        qemu_mutex_unlock_iothread();
         ret = kvm_vcpu_ioctl(env, KVM_RUN, 0);
+        qemu_mutex_lock_iothread();
         kvm_arch_post_run(env, run);
 
         if (ret == -EINTR || ret == -EAGAIN) {
-- 
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