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Commit ee7e2265 authored by Lv Zheng's avatar Lv Zheng Committed by Rafael J. Wysocki
Browse files

ACPI / button: Refactor functions to eliminate redundant code 



(Correct a wrong macro usage.)

This patch simplies the code by merging some redundant code.

No functional changes.

Signed-off-by: default avatarLv Zheng <lv.zheng@intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent c2dd4200

drivers/acpi/button.c

+49 −42
Original line number Diff line number Diff line
@@ -113,16 +113,52 @@ static struct acpi_device *lid_device; 
static struct proc_dir_entry *acpi_button_dir;

static struct proc_dir_entry *acpi_lid_dir;



static int acpi_lid_evaluate_state(struct acpi_device *device)

{

	unsigned long long lid_state;

	acpi_status status;



	status = acpi_evaluate_integer(device->handle, "_LID", NULL, &lid_state);

	if (ACPI_FAILURE(status))

		return -ENODEV;



	return lid_state ? 1 : 0;

}



static int acpi_lid_notify_state(struct acpi_device *device, int state)

{

	struct acpi_button *button = acpi_driver_data(device);

	int ret;



	/* input layer checks if event is redundant */

	input_report_switch(button->input, SW_LID, !state);

	input_sync(button->input);



	if (state)

		pm_wakeup_event(&device->dev, 0);



	ret = blocking_notifier_call_chain(&acpi_lid_notifier, state, device);

	if (ret == NOTIFY_DONE)

		ret = blocking_notifier_call_chain(&acpi_lid_notifier, state,

						   device);

	if (ret == NOTIFY_DONE || ret == NOTIFY_OK) {

		/*

		 * It is also regarded as success if the notifier_chain

		 * returns NOTIFY_OK or NOTIFY_DONE.

		 */

		ret = 0;

	}

	return ret;

}



static int acpi_button_state_seq_show(struct seq_file *seq, void *offset)

{

	struct acpi_device *device = seq->private;

	acpi_status status;

	unsigned long long state;

	int state;



	status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);

	state = acpi_lid_evaluate_state(device);

	seq_printf(seq, "state:      %s\n",

		   ACPI_FAILURE(status) ? "unsupported" :

			(state ? "open" : "closed"));

		   state < 0 ? "unsupported" : (state ? "open" : "closed"));

	return 0;

}
@@ -231,51 +267,22 @@ EXPORT_SYMBOL(acpi_lid_notifier_unregister); 


int acpi_lid_open(void)

{

	acpi_status status;

	unsigned long long state;



	if (!lid_device)

		return -ENODEV;



	status = acpi_evaluate_integer(lid_device->handle, "_LID", NULL,

				       &state);

	if (ACPI_FAILURE(status))

		return -ENODEV;



	return !!state;

	return acpi_lid_evaluate_state(lid_device);

}

EXPORT_SYMBOL(acpi_lid_open);



static int acpi_lid_send_state(struct acpi_device *device)

static int acpi_lid_update_state(struct acpi_device *device)

{

	struct acpi_button *button = acpi_driver_data(device);

	unsigned long long state;

	acpi_status status;

	int ret;



	status = acpi_evaluate_integer(device->handle, "_LID", NULL, &state);

	if (ACPI_FAILURE(status))

		return -ENODEV;

	int state;



	/* input layer checks if event is redundant */

	input_report_switch(button->input, SW_LID, !state);

	input_sync(button->input);

	state = acpi_lid_evaluate_state(device);

	if (state < 0)

		return state;



	if (state)

		pm_wakeup_event(&device->dev, 0);



	ret = blocking_notifier_call_chain(&acpi_lid_notifier, state, device);

	if (ret == NOTIFY_DONE)

		ret = blocking_notifier_call_chain(&acpi_lid_notifier, state,

						   device);

	if (ret == NOTIFY_DONE || ret == NOTIFY_OK) {

		/*

		 * It is also regarded as success if the notifier_chain

		 * returns NOTIFY_OK or NOTIFY_DONE.

		 */

		ret = 0;

	}

	return ret;

	return acpi_lid_notify_state(device, state);

}



static void acpi_button_notify(struct acpi_device *device, u32 event)
@@ -290,7 +297,7 @@ static void acpi_button_notify(struct acpi_device *device, u32 event) 
	case ACPI_BUTTON_NOTIFY_STATUS:

		input = button->input;

		if (button->type == ACPI_BUTTON_TYPE_LID) {

			acpi_lid_send_state(device);

			acpi_lid_update_state(device);

		} else {

			int keycode;