diff options
| author | Lv Zheng <lv.zheng@intel.com> | 2014-04-04 08:39:11 +0400 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2014-04-21 00:59:39 +0400 |
| commit | a94e88cdd8057fe8ea84bbb6d9a89a823c7bc49b (patch) | |
| tree | b18cb3ba8912b3c6266a4560d77ce2e2eb33546d /drivers/acpi/acpica | |
| parent | 8a216d7f6aa94c3e252bbfdb2c422e2d0380084e (diff) | |
| download | linux-a94e88cdd8057fe8ea84bbb6d9a89a823c7bc49b.tar.xz | |
ACPICA: Tables: Avoid SSDT installation with acpi_gbl_disable_ssdt_table_load.
It is reported that when acpi_gbl_disable_ssdt_table_load is specified, user
still can see it installed into /sys/firmware/acpi/tables on Linux boxes.
This is because the option only stops table "loading", but doesn't stop
table "installing", thus it is still in the acpi_gbl_root_table_list. With
previous cleanups, it is possible to prevent SSDT installations to make
it not such confusing. The global variable is also renamed. Lv Zheng.
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
[rjw: Subject]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'drivers/acpi/acpica')
| -rw-r--r-- | drivers/acpi/acpica/acglobal.h | 4 | ||||
| -rw-r--r-- | drivers/acpi/acpica/tbinstal.c | 12 | ||||
| -rw-r--r-- | drivers/acpi/acpica/tbxfload.c | 13 |
3 files changed, 14 insertions, 15 deletions
diff --git a/drivers/acpi/acpica/acglobal.h b/drivers/acpi/acpica/acglobal.h index 71bb5b50c656..0cac564ffe93 100644 --- a/drivers/acpi/acpica/acglobal.h +++ b/drivers/acpi/acpica/acglobal.h @@ -160,10 +160,10 @@ ACPI_INIT_GLOBAL(u8, acpi_gbl_truncate_io_addresses, FALSE); ACPI_INIT_GLOBAL(u8, acpi_gbl_disable_auto_repair, FALSE); /* - * Optionally do not load any SSDTs from the RSDT/XSDT during initialization. + * Optionally do not install any SSDTs from the RSDT/XSDT during initialization. * This can be useful for debugging ACPI problems on some machines. */ -ACPI_INIT_GLOBAL(u8, acpi_gbl_disable_ssdt_table_load, FALSE); +ACPI_INIT_GLOBAL(u8, acpi_gbl_disable_ssdt_table_install, FALSE); /* * We keep track of the latest version of Windows that has been requested by diff --git a/drivers/acpi/acpica/tbinstal.c b/drivers/acpi/acpica/tbinstal.c index cf1ccc576629..de10d3245d9c 100644 --- a/drivers/acpi/acpica/tbinstal.c +++ b/drivers/acpi/acpica/tbinstal.c @@ -580,6 +580,18 @@ acpi_tb_install_non_fixed_table(acpi_physical_address address, return_ACPI_STATUS(status); } + /* + * Optionally do not load any SSDTs from the RSDT/XSDT. This can + * be useful for debugging ACPI problems on some machines. + */ + if (!reload && acpi_gbl_disable_ssdt_table_install && + ACPI_COMPARE_NAME(&new_table_desc.signature, ACPI_SIG_SSDT)) { + ACPI_INFO((AE_INFO, "Ignoring installation of %4.4s at %p", + new_table_desc.signature.ascii, ACPI_CAST_PTR(void, + address))); + goto release_and_exit; + } + /* Validate and verify a table before installation */ status = acpi_tb_verify_table(&new_table_desc, NULL); diff --git a/drivers/acpi/acpica/tbxfload.c b/drivers/acpi/acpica/tbxfload.c index 62bbd384ac49..3f9eaf5c9fb7 100644 --- a/drivers/acpi/acpica/tbxfload.c +++ b/drivers/acpi/acpica/tbxfload.c @@ -179,19 +179,6 @@ static acpi_status acpi_tb_load_namespace(void) continue; } - /* - * Optionally do not load any SSDTs from the RSDT/XSDT. This can - * be useful for debugging ACPI problems on some machines. - */ - if (acpi_gbl_disable_ssdt_table_load) { - ACPI_INFO((AE_INFO, "Ignoring %4.4s at %p", - acpi_gbl_root_table_list.tables[i].signature. - ascii, ACPI_CAST_PTR(void, - acpi_gbl_root_table_list. - tables[i].address))); - continue; - } - /* Ignore errors while loading tables, get as many as possible */ (void)acpi_ut_release_mutex(ACPI_MTX_TABLES); |