1 files changed, 34 insertions, 0 deletions

diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 5622aee996b2..76784ae7e6a1 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -110,6 +110,31 @@ static struct acpi_ec {
         u8 handlers_installed;
 } *boot_ec, *first_ec;
 
+/* 
+ * Some Asus system have exchanged ECDT data/command IO addresses.
+ */
+static int print_ecdt_error(const struct dmi_system_id *id)
+{
+        printk(KERN_NOTICE PREFIX "%s detected - "
+                "ECDT has exchanged control/data I/O address\n",
+                id->ident);
+        return 0;
+}
+
+static struct dmi_system_id __cpuinitdata ec_dmi_table[] = {
+        {
+        print_ecdt_error, "Asus L4R", {
+        DMI_MATCH(DMI_BIOS_VERSION, "1008.006"),
+        DMI_MATCH(DMI_PRODUCT_NAME, "L4R"),
+        DMI_MATCH(DMI_BOARD_NAME, "L4R") }, NULL},
+        {
+        print_ecdt_error, "Asus M6R", {
+        DMI_MATCH(DMI_BIOS_VERSION, "0207"),
+        DMI_MATCH(DMI_PRODUCT_NAME, "M6R"),
+        DMI_MATCH(DMI_BOARD_NAME, "M6R") }, NULL},
+        {},
+};
+
 /* --------------------------------------------------------------------------
                              Transaction Management
    -------------------------------------------------------------------------- */
@@ -911,6 +936,15 @@ int __init acpi_ec_ecdt_probe(void)
                 pr_info(PREFIX "EC description table is found, configuring boot EC\n");
                 boot_ec->command_addr = ecdt_ptr->control.address;
                 boot_ec->data_addr = ecdt_ptr->data.address;
+                if (dmi_check_system(ec_dmi_table)) {
+                        /*
+                         * If the board falls into ec_dmi_table, it means
+                         * that ECDT table gives the incorrect command/status
+                         * & data I/O address. Just fix it.
+                         */
+                        boot_ec->data_addr = ecdt_ptr->control.address;
+                        boot_ec->command_addr = ecdt_ptr->data.address;
+                }
                 boot_ec->gpe = ecdt_ptr->gpe;
                 boot_ec->handle = ACPI_ROOT_OBJECT;
                 acpi_get_handle(ACPI_ROOT_OBJECT, ecdt_ptr->id, &boot_ec->handle);