[ 3.5.yuz extended stable ] Patch "ACPI: EC: Add a quirk for CLEVO M720T/M730T laptop" has been added to staging queue

[Herton Ronaldo Krzesinski]

This is a note to let you know that I have just added a patch titled

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

to the linux-3.5.y-queue branch of the 3.5.yuz extended stable tree 
which can be found at:

 http://kernel.ubuntu.com/git?p=ubuntu/linux.git;a=shortlog;h=refs/heads/linux-3.5.y-queue

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.5.yuz tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Herton

------

>From af3af9a88a02b310c8fe837e2b0d1faaccb008ac Mon Sep 17 00:00:00 2001
From: Feng Tang <feng.tang at intel.com>
Date: Fri, 28 Sep 2012 15:22:01 +0800
Subject: [PATCH] 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 at dei.unipd.it>
Signed-off-by: Feng Tang <feng.tang at intel.com>
Signed-off-by: Len Brown <len.brown at intel.com>
Signed-off-by: Herton Ronaldo Krzesinski <herton.krzesinski at canonical.com>
---
 drivers/acpi/ec.c |   16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 615264c..a51df96 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -930,6 +930,17 @@ 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", {
@@ -961,10 +972,13 @@ 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;
--
1.7.9.5