diff options
| -rw-r--r-- | acpi/acpi-ops.c | 9 |
1 files changed, 9 insertions, 0 deletions
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; |