Fall back to bios defaults for requests for irq 9.
Ideally we could check the PIIX3 bridge device exists on
pci, but that would require pci access before pci-arbiter
exists. This is a convenient workaround for now.
---
acpi/acpi-ops.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/acpi/acpi-ops.c b/acpi/acpi-ops.c
index 16d96e71..8fc6104f 100644
--- a/acpi/acpi-ops.c
+++ b/acpi/acpi-ops.c
@@ -30,6 +30,13 @@
#include <acpi/acpi_init.h>
#include "acpifs.h"
+/* PIIX3 chipset returns IRQ 9 for all ACPI irq requests
+ * but IDE is actually wired to legacy irqs 14 and 15.
+ * To avoid needing pci access in acpi, we can consider
+ * all mappings to 9 to be invalid irqs and use
+ * bios defaults for these requests instead. */
+#define WRONG_IRQ 9
+
static error_t
check_permissions (struct protid *master, int flags)
{
@@ -83,6 +90,8 @@ S_acpi_get_pci_irq (struct protid *master,
return err;
ret = acpi_get_irq_number(bus, dev, func);
+ if (ret == WRONG_IRQ)
+ return EOPNOTSUPP;
if (ret < 0)
return EIO;
--
2.45.2
