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Commit cddd1f71 authored by Bjorn Helgaas's avatar Bjorn Helgaas Committed by Len Brown
Browse files

panasonic-laptop: use .notify method instead of installing handler directly 



This patch adds a .notify() method.  The presence of .notify() causes
Linux/ACPI to manage event handlers and notify handlers on our behalf,
so we don't have to install and remove them ourselves.

Signed-off-by: default avatarBjorn Helgaas <bjorn.helgaas@hp.com>
CC: Harald Welte <laforge@gnumonks.org>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent b4ec0275

drivers/platform/x86/panasonic-laptop.c

+5 −21
Original line number Diff line number Diff line
@@ -176,6 +176,7 @@ enum SINF_BITS { SINF_NUM_BATTERIES = 0, 
static int acpi_pcc_hotkey_add(struct acpi_device *device);

static int acpi_pcc_hotkey_remove(struct acpi_device *device, int type);

static int acpi_pcc_hotkey_resume(struct acpi_device *device);

static void acpi_pcc_hotkey_notify(struct acpi_device *device, u32 event);



static const struct acpi_device_id pcc_device_ids[] = {

	{ "MAT0012", 0},
@@ -194,6 +195,7 @@ static struct acpi_driver acpi_pcc_driver = { 
				.add =		acpi_pcc_hotkey_add,

				.remove =	acpi_pcc_hotkey_remove,

				.resume =       acpi_pcc_hotkey_resume,

				.notify =	acpi_pcc_hotkey_notify,

			},

};
@@ -527,9 +529,9 @@ static void acpi_pcc_generate_keyinput(struct pcc_acpi *pcc) 
	return;

}



static void acpi_pcc_hotkey_notify(acpi_handle handle, u32 event, void *data)

static void acpi_pcc_hotkey_notify(struct acpi_device *device, u32 event)

{

	struct pcc_acpi *pcc = (struct pcc_acpi *) data;

	struct pcc_acpi *pcc = acpi_driver_data(device);



	switch (event) {

	case HKEY_NOTIFY:
@@ -599,7 +601,6 @@ static int acpi_pcc_hotkey_resume(struct acpi_device *device) 


static int acpi_pcc_hotkey_add(struct acpi_device *device)

{

	acpi_status status;

	struct pcc_acpi *pcc;

	int num_sifr, result;
@@ -640,22 +641,11 @@ static int acpi_pcc_hotkey_add(struct acpi_device *device) 
		goto out_sinf;

	}



	/* initialize hotkey input device */

	status = acpi_install_notify_handler(pcc->handle, ACPI_DEVICE_NOTIFY,

					     acpi_pcc_hotkey_notify, pcc);



	if (ACPI_FAILURE(status)) {

		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,

				  "Error installing notify handler\n"));

		result = -ENODEV;

		goto out_input;

	}



	/* initialize backlight */

	pcc->backlight = backlight_device_register("panasonic", NULL, pcc,

						   &pcc_backlight_ops);

	if (IS_ERR(pcc->backlight))

		goto out_notify;

		goto out_input;



	if (!acpi_pcc_retrieve_biosdata(pcc, pcc->sinf)) {

		ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
@@ -680,9 +670,6 @@ static int acpi_pcc_hotkey_add(struct acpi_device *device) 


out_backlight:

	backlight_device_unregister(pcc->backlight);

out_notify:

	acpi_remove_notify_handler(pcc->handle, ACPI_DEVICE_NOTIFY,

				   acpi_pcc_hotkey_notify);

out_input:

	input_unregister_device(pcc->input_dev);

	/* no need to input_free_device() since core input API refcount and
@@ -723,9 +710,6 @@ static int acpi_pcc_hotkey_remove(struct acpi_device *device, int type) 


	backlight_device_unregister(pcc->backlight);



	acpi_remove_notify_handler(pcc->handle, ACPI_DEVICE_NOTIFY,

				   acpi_pcc_hotkey_notify);



	input_unregister_device(pcc->input_dev);

	/* no need to input_free_device() since core input API refcount and

	 * free()s the device */