[libvirt] [PATCH v2 12/27] qemu: qemuDomainSetVcpusAgent: re-check agent before calling it the again
With a very unfortunate timing, the agent might vanish before we do the
second call while the locks were down. Re-check that the agent is
available before attempting it again.
---
src/qemu/qemu_driver.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index 62f1054..7a99ed2 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -4881,6 +4881,9 @@ qemuDomainSetVcpusAgent(virDomainObjPtr vm,
if (qemuAgentUpdateCPUInfo(nvcpus, cpuinfo, ncpuinfo) < 0)
goto cleanup;
+ if (!qemuDomainAgentAvailable(vm, true))
+ goto cleanup;
+
qemuDomainObjEnterAgent(vm);
ret = qemuAgentSetVCPUs(qemuDomainGetAgent(vm), cpuinfo, ncpuinfo);
qemuDomainObjExitAgent(vm);
--
2.6.2