ACPI: EC: Don't parse DSDT for EC early init on Compal

[pandora-kernel.git] / drivers / acpi / ec.c

diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 3fcb913..2c790b5 100644 (file)
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -120,6 +120,7 @@ static struct acpi_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
@@ -900,6 +901,13 @@ 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)
 {
@@ -916,6 +924,10 @@ static int ec_flag_msi(const struct dmi_system_id *id)
 }
 
 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"),
@@ -959,6 +971,9 @@ int __init acpi_ec_ecdt_probe(void)
        /* 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");