From 1f094025458ca3ab37346a952e05eec94450ade7 Mon Sep 17 00:00:00 2001
From: Guillaume Chinal <guiiix@invisiblethingslab.com>
Date: Fri, 7 Feb 2025 17:07:41 +0100
Subject: [PATCH] free RAM before reloading wireless driver after suspend

---
 qubes-rpc/prepare-suspend                | 6 ++++++
 qubes-rpc/qubes-suspend-module-blacklist | 1 +
 2 files changed, 7 insertions(+)

diff --git a/qubes-rpc/prepare-suspend b/qubes-rpc/prepare-suspend
index 949940ecf..03c427490 100755
--- a/qubes-rpc/prepare-suspend
+++ b/qubes-rpc/prepare-suspend
@@ -81,6 +81,12 @@ if [ "$action" = "suspend" ]; then
     done
     echo "$LOADED_MODULES" > /var/run/qubes-suspend-modules-loaded
 else
+    # Free some RAM for minimal netvm to prevent memory issues when loading
+    # drivers
+    if [ -f /var/run/qubes/this-is-netvm ] && [ -f /var/run/qubes-service/minimal-netvm ]; then
+      sync
+      echo 3 > /proc/sys/vm/drop_caches
+    fi
     # shellcheck disable=SC2013
     for mod in $(cat /var/run/qubes-suspend-modules-loaded); do
         modprobe "$mod"
diff --git a/qubes-rpc/qubes-suspend-module-blacklist b/qubes-rpc/qubes-suspend-module-blacklist
index d3f4638b6..22a4ca84f 100644
--- a/qubes-rpc/qubes-suspend-module-blacklist
+++ b/qubes-rpc/qubes-suspend-module-blacklist
@@ -6,3 +6,4 @@ ehci_pci
 xhci_pci
 iwldvm
 iwlmvm
+iwlwifi