diff options
Diffstat (limited to 'drivers/acpi/ec.c')
| -rw-r--r-- | drivers/acpi/ec.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index 7edaccce6640..615264c89c31 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); |