From 0c7c85e66314fdbb7e8bad7a6392e43e1a3a0526 Mon Sep 17 00:00:00 2001
From: OBattler <oubattler@gmail.com>
Date: Sun, 9 Mar 2025 02:18:18 +0100
Subject: [PATCH] ACPI: Do not raise or lower IRQ if IRQ line is set to IRQ 0.

---
 src/acpi.c             | 10 ++++++++--
 src/chipset/via_pipc.c |  2 ++
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/src/acpi.c b/src/acpi.c
index b33653663..ccd51ebca 100644
--- a/src/acpi.c
+++ b/src/acpi.c
@@ -211,7 +211,10 @@ acpi_update_irq(acpi_t *dev)
 
     if ((dev->regs.pmcntrl & 0x01) && sci_level)  switch (dev->irq_mode) {
         default:
-            picintlevel(1 << dev->irq_line, &dev->irq_state);
+            if (dev->irq_line != 0)
+                picintlevel(1 << dev->irq_line, &dev->irq_state);
+            else
+                dev->irq_state = 1;
             break;
         case 1:
             pci_set_irq(dev->slot, dev->irq_pin, &dev->irq_state);
@@ -223,7 +226,10 @@ acpi_update_irq(acpi_t *dev)
             break;
     } else  switch (dev->irq_mode) {
         default:
-            picintclevel(1 << dev->irq_line, &dev->irq_state);
+            if (dev->irq_line != 0)
+                picintclevel(1 << dev->irq_line, &dev->irq_state);
+            else
+                dev->irq_state = 0;
             break;
         case 1:
             pci_clear_irq(dev->slot, dev->irq_pin, &dev->irq_state);
diff --git a/src/chipset/via_pipc.c b/src/chipset/via_pipc.c
index 19355431e..11a192450 100644
--- a/src/chipset/via_pipc.c
+++ b/src/chipset/via_pipc.c
@@ -1699,6 +1699,8 @@ pipc_init(const device_t *info)
         acpi_set_nvr(dev->acpi, dev->nvr);
 
         acpi_init_gporeg(dev->acpi, 0xff, 0xbf, 0xff, 0x7f);
+
+        acpi_set_irq_mode(dev->acpi, 0);
     }
 
     return dev;