From ec135126c1ed79be84f2abd13b0981b5d4bc89ff Mon Sep 17 00:00:00 2001
From: "Issam E. Maghni" <issam.e.maghni@mailbox.org>
Date: Tue, 4 Nov 2025 10:05:41 -0500
Subject: [PATCH] raspberry-pi/4: add genet module to initrd if netboot

This module is required to have Ethernet in initial RAM disk.

It solves the issue encountered in this thread:
https://discourse.nixos.org/t/netboot-into-nfs-root-instead-of-the-fat-netboot-ramdisk/8556/2
---
 raspberry-pi/4/default.nix | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/raspberry-pi/4/default.nix b/raspberry-pi/4/default.nix
index d862a2e7..46f8d58c 100644
--- a/raspberry-pi/4/default.nix
+++ b/raspberry-pi/4/default.nix
@@ -35,7 +35,8 @@
       "vc4"
       "pcie_brcmstb" # required for the pcie bus to work
       "reset-raspberrypi" # required for vl805 firmware to load
-    ];
+    ]
+    ++ lib.optional config.boot.initrd.network.enable "genet";
 
     # Allow building kernel
     initrd.systemd.tpm2.enable = false;