1 files changed, 38 insertions, 42 deletions

diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 8dfcbb8aff7..2fe15060dcd 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -120,30 +120,7 @@ static struct acpi_ec {
 	spinlock_t curr_lock;
 } *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},
-	{},
-};
+static int EC_FLAGS_MSI; /* Out-of-spec MSI controller */
 
 /* --------------------------------------------------------------------------
                              Transaction Management
@@ -284,6 +261,8 @@ static int acpi_ec_transaction_unlocked(struct acpi_ec *ec,
 		clear_bit(EC_FLAGS_GPE_MODE, &ec->flags);
 		acpi_disable_gpe(NULL, ec->gpe);
 	}
+	if (EC_FLAGS_MSI)
+		udelay(ACPI_EC_DELAY);
 	/* start transaction */
 	spin_lock_irqsave(&ec->curr_lock, tmp);
 	/* following two actions should be kept atomic */
@@ -983,8 +962,8 @@ static const struct acpi_device_id ec_device_ids[] = {
 int __init acpi_ec_ecdt_probe(void)
 {
 	acpi_status status;
+	struct acpi_ec *saved_ec = NULL;
 	struct acpi_table_ecdt *ecdt_ptr;
-	acpi_handle dummy;
 
 	boot_ec = make_acpi_ec();
 	if (!boot_ec)
@@ -992,27 +971,27 @@ 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;
+	}
 	status = acpi_get_table(ACPI_SIG_ECDT, 1,
 				(struct acpi_table_header **)&ecdt_ptr);
 	if (ACPI_SUCCESS(status)) {
 		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);
-		/* Add some basic check against completely broken table */
-		if (boot_ec->data_addr != boot_ec->command_addr)
+		/* Don't trust ECDT, which comes from ASUSTek */
+		if (!dmi_name_in_vendors("ASUS"))
 			goto install;
+		saved_ec = kmalloc(sizeof(struct acpi_ec), GFP_KERNEL);
+		if (!saved_ec)
+			return -ENOMEM;
+		memcpy(saved_ec, boot_ec, sizeof(*saved_ec));
 	/* fall through */
 	}
 	/* This workaround is needed only on some broken machines,
@@ -1023,12 +1002,29 @@ int __init acpi_ec_ecdt_probe(void)
 	/* Check that acpi_get_devices actually find something */
 	if (ACPI_FAILURE(status) || !boot_ec->handle)
 		goto error;
-	/* We really need to limit this workaround, the only ASUS,
-	 * which needs it, has fake EC._INI method, so use it as flag.
-	 * Keep boot_ec struct as it will be needed soon.
-	 */
-	if (ACPI_FAILURE(acpi_get_handle(boot_ec->handle, "_INI", &dummy)))
-		return -ENODEV;
+	if (saved_ec) {
+		/* try to find good ECDT from ASUSTek */
+		if (saved_ec->command_addr != boot_ec->command_addr ||
+		    saved_ec->data_addr != boot_ec->data_addr ||
+		    saved_ec->gpe != boot_ec->gpe ||
+		    saved_ec->handle != boot_ec->handle)
+			pr_info(PREFIX "ASUSTek keeps feeding us with broken "
+			"ECDT tables, which are very hard to workaround. "
+			"Trying to use DSDT EC info instead. Please send "
+			"output of acpidump to linux-acpi@vger.kernel.org\n");
+		kfree(saved_ec);
+		saved_ec = NULL;
+	} else {
+		/* We really need to limit this workaround, the only ASUS,
+		* which needs it, has fake EC._INI method, so use it as flag.
+		* Keep boot_ec struct as it will be needed soon.
+		*/
+		acpi_handle dummy;
+		if (!dmi_name_in_vendors("ASUS") ||
+		    ACPI_FAILURE(acpi_get_handle(boot_ec->handle, "_INI",
+							&dummy)))
+			return -ENODEV;
+	}
 install:
 	if (!ec_install_handlers(boot_ec)) {
 		first_ec = boot_ec;