From: Feng Tang <feng.tang@intel.com>
Date: Fri, 28 Sep 2012 07:22:01 +0000 (+0800)
Subject: ACPI: EC: Add a quirk for CLEVO M720T/M730T laptop
X-Git-Tag: v3.0.47~34
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=57600cd8d471a6a0a1f97ecdc838954fd202c28f;p=karo-tx-linux.git

ACPI: EC: Add a quirk for CLEVO M720T/M730T laptop

commit 67bfa9b60bd689601554526d144b21d529f78a09 upstream.

By enlarging the GPE storm threshold back to 20, that laptop's
EC works fine with interrupt mode instead of polling mode.

https://bugzilla.kernel.org/show_bug.cgi?id=45151

Reported-and-Tested-by: Francesco <trentini@dei.unipd.it>
Signed-off-by: Feng Tang <feng.tang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---

diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 05b3331ff2c1..d2519b200e95 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -920,6 +920,17 @@ static int ec_flag_msi(const struct dmi_system_id *id)
 	return 0;
 }
 
+/*
+ * Clevo M720 notebook actually works ok with IRQ mode, if we lifted
+ * the GPE storm threshold back to 20
+ */
+static int ec_enlarge_storm_threshold(const struct dmi_system_id *id)
+{
+	pr_debug("Setting the EC GPE storm threshold to 20\n");
+	ec_storm_threshold  = 20;
+	return 0;
+}
+
 static struct dmi_system_id __initdata ec_dmi_table[] = {
 	{
 	ec_skip_dsdt_scan, "Compal JFL92", {
@@ -951,10 +962,13 @@ static struct dmi_system_id __initdata ec_dmi_table[] = {
 	{
 	ec_validate_ecdt, "ASUS hardware", {
 	DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer Inc.") }, NULL},
+	{
+	ec_enlarge_storm_threshold, "CLEVO hardware", {
+	DMI_MATCH(DMI_SYS_VENDOR, "CLEVO Co."),
+	DMI_MATCH(DMI_PRODUCT_NAME, "M720T/M730T"),}, NULL},
 	{},
 };
 
-
 int __init acpi_ec_ecdt_probe(void)
 {
 	acpi_status status;