diff options
Diffstat (limited to 'drivers/acpi/ec.c')
| -rw-r--r-- | drivers/acpi/ec.c | 28 |
1 files changed, 19 insertions, 9 deletions
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index d6471bb6852..27e0b92b2e3 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -307,7 +307,11 @@ static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t) pr_debug(PREFIX "transaction start\n"); /* disable GPE during transaction if storm is detected */ if (test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) { - acpi_disable_gpe(NULL, ec->gpe); + /* + * It has to be disabled at the hardware level regardless of the + * GPE reference counting, so that it doesn't trigger. + */ + acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_DISABLE); } status = acpi_ec_transaction_unlocked(ec, t); @@ -316,8 +320,12 @@ static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t) ec_check_sci_sync(ec, acpi_ec_read_status(ec)); if (test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) { msleep(1); - /* it is safe to enable GPE outside of transaction */ - acpi_enable_gpe(NULL, ec->gpe); + /* + * It is safe to enable the GPE outside of the transaction. Use + * acpi_set_gpe() for that, since we used it to disable the GPE + * above. + */ + acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_ENABLE); } else if (t->irq_count > ACPI_EC_STORM_THRESHOLD) { pr_info(PREFIX "GPE storm detected, " "transactions will use polling mode\n"); @@ -788,8 +796,8 @@ static int ec_install_handlers(struct acpi_ec *ec) &acpi_ec_gpe_handler, ec); if (ACPI_FAILURE(status)) return -ENODEV; - acpi_set_gpe_type(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME); - acpi_enable_gpe(NULL, ec->gpe); + + acpi_enable_gpe(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME); status = acpi_install_address_space_handler(ec->handle, ACPI_ADR_SPACE_EC, &acpi_ec_space_handler, @@ -806,6 +814,7 @@ static int ec_install_handlers(struct acpi_ec *ec) } else { acpi_remove_gpe_handler(NULL, ec->gpe, &acpi_ec_gpe_handler); + acpi_disable_gpe(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME); return -ENODEV; } } @@ -816,6 +825,7 @@ static int ec_install_handlers(struct acpi_ec *ec) static void ec_remove_handlers(struct acpi_ec *ec) { + acpi_disable_gpe(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME); if (ACPI_FAILURE(acpi_remove_address_space_handler(ec->handle, ACPI_ADR_SPACE_EC, &acpi_ec_space_handler))) pr_err(PREFIX "failed to remove space handler\n"); @@ -1057,16 +1067,16 @@ error: static int acpi_ec_suspend(struct acpi_device *device, pm_message_t state) { struct acpi_ec *ec = acpi_driver_data(device); - /* Stop using GPE */ - acpi_disable_gpe(NULL, ec->gpe); + /* Stop using the GPE, but keep it reference counted. */ + acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_DISABLE); return 0; } static int acpi_ec_resume(struct acpi_device *device) { struct acpi_ec *ec = acpi_driver_data(device); - /* Enable use of GPE back */ - acpi_enable_gpe(NULL, ec->gpe); + /* Enable the GPE again, but don't reference count it once more. */ + acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_ENABLE); return 0; } |