1 files changed, 25 insertions, 5 deletions

diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 7edaccce6640..a51df9681319 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -71,9 +71,6 @@ enum ec_command {
 #define ACPI_EC_UDELAY_GLK      1000    /* Wait 1ms max. to get global lock */
 #define ACPI_EC_MSI_UDELAY      550     /* Wait 550us for MSI EC */
 
-#define ACPI_EC_STORM_THRESHOLD 8       /* number of false interrupts
-                                           per one transaction */
-
 enum {
         EC_FLAGS_QUERY_PENDING,         /* Query is pending */
         EC_FLAGS_GPE_STORM,             /* GPE storm detected */
@@ -87,6 +84,15 @@ static unsigned int ec_delay __read_mostly = ACPI_EC_DELAY;
 module_param(ec_delay, uint, 0644);
 MODULE_PARM_DESC(ec_delay, "Timeout(ms) waited until an EC command completes");
 
+/*
+ * If the number of false interrupts per one transaction exceeds
+ * this threshold, will think there is a GPE storm happened and
+ * will disable the GPE for normal transaction.
+ */
+static unsigned int ec_storm_threshold  __read_mostly = 8;
+module_param(ec_storm_threshold, uint, 0644);
+MODULE_PARM_DESC(ec_storm_threshold, "Maxim false GPE numbers not considered as GPE storm");
+
 /* If we find an EC via the ECDT, we need to keep a ptr to its context */
 /* External interfaces use first EC only, so remember */
 typedef int (*acpi_ec_query_func) (void *data);
@@ -319,7 +325,7 @@ static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t)
                 msleep(1);
                 /* It is safe to enable the GPE outside of the transaction. */
                 acpi_enable_gpe(NULL, ec->gpe);
-        } else if (t->irq_count > ACPI_EC_STORM_THRESHOLD) {
+        } else if (t->irq_count > ec_storm_threshold) {
                 pr_info(PREFIX "GPE storm detected, "
                         "transactions will use polling mode\n");
                 set_bit(EC_FLAGS_GPE_STORM, &ec->flags);
@@ -924,6 +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", {
@@ -955,10 +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;