From f86bbc3b1d0b99543f4427b278e64d7543323e18 Mon Sep 17 00:00:00 2001
From: Dentomologist <dentomologist@gmail.com>
Date: Sun, 29 Mar 2026 17:29:36 -0700
Subject: [PATCH 1/2] AutoUpdate: Don't start redundant update checks

Ignore any new update check requests if one is already in progress.
---
 Source/Core/UICommon/AutoUpdate.cpp | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/Source/Core/UICommon/AutoUpdate.cpp b/Source/Core/UICommon/AutoUpdate.cpp
index 668a991545..768f607803 100644
--- a/Source/Core/UICommon/AutoUpdate.cpp
+++ b/Source/Core/UICommon/AutoUpdate.cpp
@@ -3,6 +3,7 @@
 
 #include "UICommon/AutoUpdate.h"
 
+#include <atomic>
 #include <cstdlib>
 #include <string>
 
@@ -12,6 +13,7 @@
 #include "Common/HttpRequest.h"
 #include "Common/Logging/Log.h"
 #include "Common/MsgHandler.h"
+#include "Common/ScopeGuard.h"
 #include "Common/StringUtil.h"
 #include "Common/Version.h"
 
@@ -36,6 +38,7 @@
 
 namespace
 {
+std::atomic_bool s_check_in_progress = false;
 bool s_update_triggered = false;
 
 #ifdef __APPLE__
@@ -188,6 +191,20 @@ static u32 GetOwnProcessId()
 void AutoUpdateChecker::CheckForUpdate(std::string_view update_track,
                                        std::string_view hash_override, const CheckType check_type)
 {
+  bool expected_check_in_progress = false;
+  if (!s_check_in_progress.compare_exchange_strong(expected_check_in_progress, true))
+    return;
+
+  Common::ScopeGuard guard([]() { s_check_in_progress.store(false); });
+
+  if (s_update_triggered)
+  {
+    if (check_type == CheckType::Manual)
+      SuccessAlertFmtT("A Dolphin update is already scheduled for the next time it closes.");
+
+    return;
+  }
+
   // Don't bother checking if updates are not supported or not enabled.
   if (!SystemSupportsAutoUpdates() || update_track.empty())
     return;

From 68ac3d651d94f904d8847dc3cefb85b2394aa0c6 Mon Sep 17 00:00:00 2001
From: Dentomologist <dentomologist@gmail.com>
Date: Sun, 29 Mar 2026 17:18:09 -0700
Subject: [PATCH 2/2] AutoUpdate: Only set triggered flag if process creation
 succeeds

Don't set `s_update_triggered` if the updater process fails to be
created. This will allow users in that situation to try to start an
update later without having to restart Dolphin first.
---
 Source/Core/UICommon/AutoUpdate.cpp | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/Source/Core/UICommon/AutoUpdate.cpp b/Source/Core/UICommon/AutoUpdate.cpp
index 768f607803..4298382b32 100644
--- a/Source/Core/UICommon/AutoUpdate.cpp
+++ b/Source/Core/UICommon/AutoUpdate.cpp
@@ -278,7 +278,6 @@ void AutoUpdateChecker::TriggerUpdate(const AutoUpdateChecker::NewVersionInforma
     return;
   }
 
-  s_update_triggered = true;
 #ifdef OS_SUPPORTS_UPDATER
   std::map<std::string, std::string> updater_flags;
   updater_flags["this-manifest-url"] = info.this_manifest_url;
@@ -319,6 +318,7 @@ void AutoUpdateChecker::TriggerUpdate(const AutoUpdateChecker::NewVersionInforma
   {
     CloseHandle(pinfo.hThread);
     CloseHandle(pinfo.hProcess);
+    s_update_triggered = true;
   }
   else
   {
@@ -331,6 +331,10 @@ void AutoUpdateChecker::TriggerUpdate(const AutoUpdateChecker::NewVersionInforma
     const std::string error = Common::LastStrerrorString();
     CriticalAlertFmtT("Could not start updater process: {0}", error);
   }
+  else
+  {
+    s_update_triggered = true;
+  }
 #endif
 
 #endif