[reactos] 10/15: [NTOS:KE] Disable interrupts before lowering IRQL in KiDpcInterruptHandler to avoid stacking up DPC interrupts

[Timo Kreuzer]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=366e8a840ca8ef4484a183...

commit 366e8a840ca8ef4484a183ce6a22ba410a0cafed
Author:     Timo Kreuzer [e-mail]
AuthorDate: Fri Mar 9 21:07:10 2018 +0100
Commit:     Timo Kreuzer [e-mail]
CommitDate: Sun Sep 20 23:08:17 2020 +0200

[NTOS:KE] Disable interrupts before lowering IRQL in KiDpcInterruptHandler to avoid stacking up DPC interrupts
---
 ntoskrnl/ke/amd64/stubs.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/ntoskrnl/ke/amd64/stubs.c b/ntoskrnl/ke/amd64/stubs.c
index 43117fe6868..ff973935d69 100644
--- a/ntoskrnl/ke/amd64/stubs.c
+++ b/ntoskrnl/ke/amd64/stubs.c
@@ -71,9 +71,9 @@ KiDpcInterruptHandler(VOID)
         KiSwapContext(APC_LEVEL, OldThread);
     }

-    /* Go back to old irql and disable interrupts */
-    KeLowerIrql(OldIrql);
+    /* Disable interrupts and go back to old irql */
     _disable();
+    KeLowerIrql(OldIrql);
 }