diff --git a/hw/ipmi/ipmi.c b/hw/ipmi/ipmi.c
index dfab272f9ed5549d54132b7d45909f1d175dfbdc..6adec1e990b101d1cf44e62d2d78f37ba0a11a50 100644
--- a/hw/ipmi/ipmi.c
+++ b/hw/ipmi/ipmi.c
@@ -51,9 +51,7 @@ static int ipmi_do_hw_op(IPMIInterface *s, enum ipmi_op op, int checkonly)
         if (checkonly) {
             return 0;
         }
-        qemu_mutex_lock_iothread();
         qmp_inject_nmi(NULL);
-        qemu_mutex_unlock_iothread();
         return 0;
 
     case IPMI_POWERCYCLE_CHASSIS: