From b3e6487cbebfaada40d407ac8d98daf9e370153c Mon Sep 17 00:00:00 2001
From: Fred Suter <suterf@ornl.gov>
Date: Thu, 3 Nov 2022 21:50:46 -0400
Subject: [PATCH 1/1] fix deadlock found by hcasanova in case of self
 communications

---
 src/surf/sio_S22.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/surf/sio_S22.cpp b/src/surf/sio_S22.cpp
index 24fa3bfffb..ee3620cfb9 100644
--- a/src/surf/sio_S22.cpp
+++ b/src/surf/sio_S22.cpp
@@ -170,7 +170,7 @@ S22Action::S22Action(Model* model, s4u::Host* src_host, DiskImpl* src_disk, s4u:
   if (dst_disk_ != nullptr)
     disk_nb++;
 
-  if (src_host_ != dst_host_ && size_ > 0) {
+  if (size_ > 0) {
     std::unordered_set<const char*> affected_links;
     double lat = 0.0;
     std::vector<StandardLinkImpl*> route;
@@ -198,7 +198,7 @@ S22Action::S22Action(Model* model, s4u::Host* src_host, DiskImpl* src_disk, s4u:
   if (dst_disk_ != nullptr)
     model->get_maxmin_system()->expand(dst_disk_->get_constraint(), get_variable(), size, true);
 
-  if (src_host_ != dst_host_) {
+  if (link_nb > 0) {
     std::vector<StandardLinkImpl*> route;
     src_host_->route_to(dst_host_, route, nullptr);
     for (auto const& link : route)
-- 
2.20.1