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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: Francesco <trentini@dei.unipd.it>
Signed-off-by: Feng Tang <feng.tang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
cc: stable@vger.kernel.org
This commit is contained in:
Feng Tang 2012-09-28 15:22:01 +08:00 committed by Len Brown
parent a520d52e99
commit 67bfa9b60b
1 changed files with 15 additions and 1 deletions
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16
drivers/acpi/ec.c
View File

@ -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;