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: Ben Hutchings <ben@decadent.org.uk>

diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 05b3331ff2c1f956455813bfb98937fe4f3a2e1d..d2519b200e95e7a66ee60325bd3d062cb3d61a1e 100644 (file)
--- 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;