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authorLin Ming <ming.m.lin@intel.com>2010-04-01 10:47:56 +0800
committerLen Brown <len.brown@intel.com>2010-04-20 10:43:16 -0400
commit729df0f848daf2f17d02107199fa92efe909d995 (patch)
treed4ece34a277019368999fd36a0bf15a39eeaa742 /drivers/acpi/acpica/psxface.c
parentc1637e9c649a0eb72c467041d78275aabdd48a41 (diff)
downloadlinux-linaro-stable-729df0f848daf2f17d02107199fa92efe909d995.tar.gz
ACPICA: Add detection of corrupted/replaced DSDT
This change adds support to detect a DSDT that has been corrupted and/or replaced from outside the OS (by firmware). This is typically catastrophic for the system, but has been seen on some machines. https://bugzilla.kernel.org/show_bug.cgi?id=14679 Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/acpica/psxface.c')
-rw-r--r--drivers/acpi/acpica/psxface.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/acpi/acpica/psxface.c b/drivers/acpi/acpica/psxface.c
index 6064dd4e94c2..67e7ad517051 100644
--- a/drivers/acpi/acpica/psxface.c
+++ b/drivers/acpi/acpica/psxface.c
@@ -220,6 +220,10 @@ acpi_status acpi_ps_execute_method(struct acpi_evaluate_info *info)
ACPI_FUNCTION_TRACE(ps_execute_method);
+ /* Quick validation of DSDT header */
+
+ acpi_tb_check_dsdt_header();
+
/* Validate the Info and method Node */
if (!info || !info->resolved_node) {