EC_FLAGS_GPE_STORM, /* GPE storm detected */
EC_FLAGS_HANDLERS_INSTALLED, /* Handlers for GPE and
* OpReg are installed */
- EC_FLAGS_FROZEN, /* Transactions are suspended */
+ EC_FLAGS_BLOCKED, /* Transactions are blocked */
};
/* If we find an EC via the ECDT, we need to keep a ptr to its context */
if (t->rdata)
memset(t->rdata, 0, t->rlen);
mutex_lock(&ec->lock);
- if (test_bit(EC_FLAGS_FROZEN, &ec->flags)) {
+ if (test_bit(EC_FLAGS_BLOCKED, &ec->flags)) {
status = -EINVAL;
goto unlock;
}
EXPORT_SYMBOL(ec_transaction);
-void acpi_ec_suspend_transactions(void)
+void acpi_ec_block_transactions(void)
{
struct acpi_ec *ec = first_ec;
mutex_lock(&ec->lock);
/* Prevent transactions from being carried out */
- set_bit(EC_FLAGS_FROZEN, &ec->flags);
+ set_bit(EC_FLAGS_BLOCKED, &ec->flags);
mutex_unlock(&ec->lock);
}
-void acpi_ec_resume_transactions(void)
+void acpi_ec_unblock_transactions(void)
{
struct acpi_ec *ec = first_ec;
mutex_lock(&ec->lock);
/* Allow transactions to be carried out again */
- clear_bit(EC_FLAGS_FROZEN, &ec->flags);
+ clear_bit(EC_FLAGS_BLOCKED, &ec->flags);
mutex_unlock(&ec->lock);
}
+void acpi_ec_unblock_transactions_early(void)
+{
+ /*
+ * Allow transactions to happen again (this function is called from
+ * atomic context during wakeup, so we don't need to acquire the mutex).
+ */
+ if (first_ec)
+ clear_bit(EC_FLAGS_BLOCKED, &first_ec->flags);
+}
+
static int acpi_ec_query_unlocked(struct acpi_ec *ec, u8 * data)
{
int result;
}
/**
- * acpi_pm_disable_gpes - Disable the GPEs.
+ * acpi_pm_freeze - Disable the GPEs and suspend EC transactions.
*/
-static int acpi_pm_disable_gpes(void)
+static int acpi_pm_freeze(void)
{
acpi_disable_all_gpes();
+ acpi_os_wait_events_complete(NULL);
+ acpi_ec_block_transactions();
return 0;
}
int error = __acpi_pm_prepare();
if (!error)
- acpi_disable_all_gpes();
+ acpi_pm_freeze();
+
return error;
}
* acpi_leave_sleep_state will reenable specific GPEs later
*/
acpi_disable_all_gpes();
+ /* Allow EC transactions to happen. */
+ acpi_ec_unblock_transactions_early();
local_irq_restore(flags);
printk(KERN_DEBUG "Back to C!\n");
return ACPI_SUCCESS(status) ? 0 : -EFAULT;
}
+static void acpi_suspend_finish(void)
+{
+ acpi_ec_unblock_transactions();
+ acpi_pm_finish();
+}
+
static int acpi_suspend_state_valid(suspend_state_t pm_state)
{
u32 acpi_state;
.begin = acpi_suspend_begin,
.prepare_late = acpi_pm_prepare,
.enter = acpi_suspend_enter,
- .wake = acpi_pm_finish,
+ .wake = acpi_suspend_finish,
.end = acpi_pm_end,
};
static struct platform_suspend_ops acpi_suspend_ops_old = {
.valid = acpi_suspend_state_valid,
.begin = acpi_suspend_begin_old,
- .prepare_late = acpi_pm_disable_gpes,
+ .prepare_late = acpi_pm_freeze,
.enter = acpi_suspend_enter,
- .wake = acpi_pm_finish,
+ .wake = acpi_suspend_finish,
.end = acpi_pm_end,
.recover = acpi_pm_finish,
};
static void acpi_hibernation_finish(void)
{
hibernate_nvs_free();
+ acpi_ec_unblock_transactions();
acpi_pm_finish();
}
}
/* Restore the NVS memory area */
hibernate_nvs_restore();
+ /* Allow EC transactions to happen. */
+ acpi_ec_unblock_transactions_early();
}
-static int acpi_pm_pre_restore(void)
-{
- acpi_disable_all_gpes();
- acpi_os_wait_events_complete(NULL);
- acpi_ec_suspend_transactions();
- return 0;
-}
-
-static void acpi_pm_restore_cleanup(void)
+static void acpi_pm_thaw(void)
{
- acpi_ec_resume_transactions();
+ acpi_ec_unblock_transactions();
acpi_enable_all_runtime_gpes();
}
.prepare = acpi_pm_prepare,
.enter = acpi_hibernation_enter,
.leave = acpi_hibernation_leave,
- .pre_restore = acpi_pm_pre_restore,
- .restore_cleanup = acpi_pm_restore_cleanup,
+ .pre_restore = acpi_pm_freeze,
+ .restore_cleanup = acpi_pm_thaw,
};
/**
static int acpi_hibernation_pre_snapshot_old(void)
{
- int error = acpi_pm_disable_gpes();
-
- if (!error)
- hibernate_nvs_save();
-
- return error;
+ acpi_pm_freeze();
+ hibernate_nvs_save();
+ return 0;
}
/*
.end = acpi_pm_end,
.pre_snapshot = acpi_hibernation_pre_snapshot_old,
.finish = acpi_hibernation_finish,
- .prepare = acpi_pm_disable_gpes,
+ .prepare = acpi_pm_freeze,
.enter = acpi_hibernation_enter,
.leave = acpi_hibernation_leave,
- .pre_restore = acpi_pm_pre_restore,
- .restore_cleanup = acpi_pm_restore_cleanup,
+ .pre_restore = acpi_pm_freeze,
+ .restore_cleanup = acpi_pm_thaw,
.recover = acpi_pm_finish,
};
#endif /* CONFIG_HIBERNATION */