diff options
Diffstat (limited to 'drivers/acpi/osl.c')
| -rw-r--r-- | drivers/acpi/osl.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c index 70af3fbbebe5..fed446aace42 100644 --- a/drivers/acpi/osl.c +++ b/drivers/acpi/osl.c @@ -642,6 +642,15 @@ acpi_status acpi_os_read_port(acpi_io_address port, u32 *value, u32 width) { u32 dummy; + if (!IS_ENABLED(CONFIG_HAS_IOPORT)) { + /* + * set all-1 result as if reading from non-existing + * I/O port + */ + *value = GENMASK(width, 0); + return AE_NOT_IMPLEMENTED; + } + if (value) *value = 0; else @@ -665,6 +674,9 @@ EXPORT_SYMBOL(acpi_os_read_port); acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) { + if (!IS_ENABLED(CONFIG_HAS_IOPORT)) + return AE_NOT_IMPLEMENTED; + if (width <= 8) { outb(value, port); } else if (width <= 16) { |