From 11c0384bf0563718806e92d83fbd23e588231f10 Mon Sep 17 00:00:00 2001
From: Evgeny Kurnevsky <kurnevsky@gmail.com>
Date: Tue, 6 Jul 2021 10:18:58 +0300
Subject: [PATCH] nixos/swap: allow luks discards if swap discards are enabled

---
 nixos/modules/config/swap.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/nixos/modules/config/swap.nix b/nixos/modules/config/swap.nix
index a37b46b8c468..faf4d2bde74b 100644
--- a/nixos/modules/config/swap.nix
+++ b/nixos/modules/config/swap.nix
@@ -215,7 +215,7 @@ in
                   fi
                 ''}
                 ${optionalString sw.randomEncryption.enable ''
-                  cryptsetup plainOpen -c ${sw.randomEncryption.cipher} -d ${sw.randomEncryption.source} ${sw.device} ${sw.deviceName}
+                  cryptsetup plainOpen -c ${sw.randomEncryption.cipher} -d ${sw.randomEncryption.source} ${optionalString (sw.discardPolicy != null) "--allow-discards"} ${sw.device} ${sw.deviceName}
                   mkswap ${sw.realDevice}
                 ''}
               '';