From ea711415c49d27f4a3c0c050d0d5e801f3bde412 Mon Sep 17 00:00:00 2001
From: Timo Kreuzer <timo.kreuzer@reactos.org>
Date: Sat, 2 Mar 2024 13:49:21 +0200
Subject: [PATCH] [NTOS:KE/x64] Lower IRQL to passive while running idle
 function

---
 ntoskrnl/ke/amd64/stubs.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/ntoskrnl/ke/amd64/stubs.c b/ntoskrnl/ke/amd64/stubs.c
index 7bfdb98f00e..98c420ade8f 100644
--- a/ntoskrnl/ke/amd64/stubs.c
+++ b/ntoskrnl/ke/amd64/stubs.c
@@ -156,9 +156,15 @@ KiIdleLoop(VOID)
         {
             Prcb->IdleHalt = 1;
 
+            /* Lower IRQL to passive */
+            KeLowerIrql(PASSIVE_LEVEL);
+
             /* Continue staying idle. Note the HAL returns with interrupts on */
             Prcb->PowerState.IdleFunction(&Prcb->PowerState);
 
+            /* Raise IRQL back to DISPATCH_LEVEL */
+            KfRaiseIrql(DISPATCH_LEVEL);
+
             Prcb->IdleHalt = 0;
         }
     }