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>

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/acpi/acpica/tbutils.c b/drivers/acpi/acpica/tbutils.c
index 54a8712bae62..a9b105fc2e55 100644
--- a/drivers/acpi/acpica/tbutils.c
+++ b/drivers/acpi/acpica/tbutils.c
@@ -373,6 +373,10 @@ void acpi_tb_check_dsdt_header(void)
                 acpi_tb_print_table_header(0, &acpi_gbl_original_dsdt_header);
                 acpi_tb_print_table_header(0, acpi_gbl_DSDT);
 
+                ACPI_ERROR((AE_INFO,
+                            "Please send DMI info to linux-acpi@vger.kernel.org\n"
+                            "If system does not work as expected, please boot with acpi=copy_dsdt"));
+
                 /* Disable further error messages */
 
                 acpi_gbl_original_dsdt_header.length = acpi_gbl_DSDT->length;