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/tbinstal.c | |
| 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/tbinstal.c')
| -rw-r--r-- | drivers/acpi/acpica/tbinstal.c | 12 |
1 files changed, 12 insertions, 0 deletions
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); |