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Commit 67bfa9b6 authored by Feng Tang's avatar Feng Tang Committed by Len Brown
Browse files

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

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: default avatarFrancesco <trentini@dei.unipd.it>
Signed-off-by: default avatarFeng Tang <feng.tang@intel.com>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
cc: stable@vger.kernel.org
parent a520d52e

drivers/acpi/ec.c

+15 −1
Original line number Diff line number Diff line
@@ -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;