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authorLin Ming <ming.m.lin@intel.com>2010-04-08 14:34:27 +0800
committerLen Brown <len.brown@intel.com>2010-04-20 10:43:16 -0400
commitaa2110cb1a7510f9b834adfb39b05d4843a35d35 (patch)
tree0dda563bb8a8251fb6f6b878f16598a3901f992f /drivers/acpi/bus.c
parent43323cb4c4b619414913f54fef9d492aabadd033 (diff)
ACPI: add boot option acpi=copy_dsdt to fix corrupt DSDT
Some BIOS on Toshiba machines corrupt the DSDT, so add a new boot option acpi=copy_dsdt to workaround it. Add warning message to ask users to use this option if corrupt DSDT detected. Also build a DMI blacklist to check it and automatically copy DSDT. https://bugzilla.kernel.org/show_bug.cgi?id=14679 Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/bus.c')
-rw-r--r--drivers/acpi/bus.c37
1 files changed, 37 insertions, 0 deletions
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 37132dc2da0..49af19bb8c9 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -69,6 +69,37 @@ static struct dmi_system_id __cpuinitdata power_nocheck_dmi_table[] = {
};
+static int set_copy_dsdt(const struct dmi_system_id *id)
+{
+ printk(KERN_NOTICE "%s detected - "
+ "force copy of DSDT to local memory\n", id->ident);
+ acpi_gbl_copy_dsdt_locally = 1;
+ return 0;
+}
+
+static struct dmi_system_id dsdt_dmi_table[] __initdata = {
+ /*
+ * Insyde BIOS on some TOSHIBA machines corrupt the DSDT.
+ * https://bugzilla.kernel.org/show_bug.cgi?id=14679
+ */
+ {
+ .callback = set_copy_dsdt,
+ .ident = "TOSHIBA Satellite A505",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Satellite A505"),
+ },
+ },
+ {
+ .callback = set_copy_dsdt,
+ .ident = "TOSHIBA Satellite L505D",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "Satellite L505D"),
+ },
+ }
+};
+
/* --------------------------------------------------------------------------
Device Management
-------------------------------------------------------------------------- */
@@ -813,6 +844,12 @@ void __init acpi_early_init(void)
acpi_gbl_permanent_mmap = 1;
+ /*
+ * If the machine falls into the DMI check table,
+ * DSDT will be copied to memory
+ */
+ dmi_check_system(dsdt_dmi_table);
+
status = acpi_reallocate_root_table();
if (ACPI_FAILURE(status)) {
printk(KERN_ERR PREFIX