From 7b930750b13aeb35d57d4dcacf3714b17e1186c3 Mon Sep 17 00:00:00 2001
From: Richard Moe Gustavsen <richard.gustavsen@qt.io>
Date: Mon, 13 Sep 2021 16:41:08 +0200
Subject: [PATCH] QPlatformWindow: fix isAncestorOf not breaking recursion
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The current implementation got stuck always asking for
the parent of the same child

This patch will make sure we actually walk up the
parent chain.

Change-Id: I9f67f6305e0143526f53952a563d496e760ac2e7
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
(cherry picked from commit f06f39779c11cabc9b4fc281f38c80edb65bd86a)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
---
 src/gui/kernel/qplatformwindow.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/gui/kernel/qplatformwindow.cpp b/src/gui/kernel/qplatformwindow.cpp
index 0bee2968f7e..633a262d562 100644
--- a/src/gui/kernel/qplatformwindow.cpp
+++ b/src/gui/kernel/qplatformwindow.cpp
@@ -229,7 +229,7 @@ bool QPlatformWindow::isActive() const
 */
 bool QPlatformWindow::isAncestorOf(const QPlatformWindow *child) const
 {
-    for (const QPlatformWindow *parent = child->parent(); parent; parent = child->parent()) {
+    for (const QPlatformWindow *parent = child->parent(); parent; parent = parent->parent()) {
         if (parent == this)
             return true;
     }