1 files changed, 46 insertions, 6 deletions

diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 8a4897d3899d..baef28c1e630 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -119,6 +119,8 @@ static struct acpi_ec {
 } *boot_ec, *first_ec;
 
 static int EC_FLAGS_MSI; /* Out-of-spec MSI controller */
+static int EC_FLAGS_VALIDATE_ECDT; /* ASUStec ECDTs need to be validated */
+static int EC_FLAGS_SKIP_DSDT_SCAN; /* Not all BIOS survive early DSDT scan */
 
 /* --------------------------------------------------------------------------
                              Transaction Management
@@ -897,6 +899,44 @@ static const struct acpi_device_id ec_device_ids[] = {
         {"", 0},
 };
 
+/* Some BIOS do not survive early DSDT scan, skip it */
+static int ec_skip_dsdt_scan(const struct dmi_system_id *id)
+{
+        EC_FLAGS_SKIP_DSDT_SCAN = 1;
+        return 0;
+}
+
+/* ASUStek often supplies us with broken ECDT, validate it */
+static int ec_validate_ecdt(const struct dmi_system_id *id)
+{
+        EC_FLAGS_VALIDATE_ECDT = 1;
+        return 0;
+}
+
+/* MSI EC needs special treatment, enable it */
+static int ec_flag_msi(const struct dmi_system_id *id)
+{
+        EC_FLAGS_MSI = 1;
+        EC_FLAGS_VALIDATE_ECDT = 1;
+        return 0;
+}
+
+static struct dmi_system_id __initdata ec_dmi_table[] = {
+        {
+        ec_skip_dsdt_scan, "Compal JFL92", {
+        DMI_MATCH(DMI_BIOS_VENDOR, "COMPAL"),
+        DMI_MATCH(DMI_BOARD_NAME, "JFL92") }, NULL},
+        {
+        ec_flag_msi, "MSI hardware", {
+        DMI_MATCH(DMI_BIOS_VENDOR, "Micro-Star"),
+        DMI_MATCH(DMI_CHASSIS_VENDOR, "MICRO-Star") }, NULL},
+        {
+        ec_validate_ecdt, "ASUS hardware", {
+        DMI_MATCH(DMI_BIOS_VENDOR, "ASUS") }, NULL},
+        {},
+};
+
+
 int __init acpi_ec_ecdt_probe(void)
 {
         acpi_status status;
@@ -909,11 +949,7 @@ int __init acpi_ec_ecdt_probe(void)
         /*
          * Generate a boot ec context
          */
-        if (dmi_name_in_vendors("Micro-Star") ||
-            dmi_name_in_vendors("Notebook")) {
-                pr_info(PREFIX "Enabling special treatment for EC from MSI.\n");
-                EC_FLAGS_MSI = 1;
-        }
+        dmi_check_system(ec_dmi_table);
         status = acpi_get_table(ACPI_SIG_ECDT, 1,
                                 (struct acpi_table_header **)&ecdt_ptr);
         if (ACPI_SUCCESS(status)) {
@@ -924,7 +960,7 @@ int __init acpi_ec_ecdt_probe(void)
                 boot_ec->handle = ACPI_ROOT_OBJECT;
                 acpi_get_handle(ACPI_ROOT_OBJECT, ecdt_ptr->id, &boot_ec->handle);
                 /* Don't trust ECDT, which comes from ASUSTek */
-                if (!dmi_name_in_vendors("ASUS") && EC_FLAGS_MSI == 0)
+                if (!EC_FLAGS_VALIDATE_ECDT)
                         goto install;
                 saved_ec = kmalloc(sizeof(struct acpi_ec), GFP_KERNEL);
                 if (!saved_ec)
@@ -932,6 +968,10 @@ int __init acpi_ec_ecdt_probe(void)
                 memcpy(saved_ec, boot_ec, sizeof(struct acpi_ec));
         /* fall through */
         }
+
+        if (EC_FLAGS_SKIP_DSDT_SCAN)
+                return -ENODEV;
+
         /* This workaround is needed only on some broken machines,
          * which require early EC, but fail to provide ECDT */
         printk(KERN_DEBUG PREFIX "Look up EC in DSDT\n");