staging: nvec: cleanup childs on remove

Disable device functions and unregister notifier if available. The
serio device must not be "kzallocated". Otherwise serio_unregister_port
will fail because the device is already freed.
Signed-off-by: Marc Dietrich <marvin24@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/nvec/nvec.c

@@ -829,7 +829,7 @@ static int tegra_nvec_probe(struct platform_device *pdev)
 		return -ENODEV;
 	}
 
-	i2c_clk = clk_get(&pdev->dev, "div-clk");
+	i2c_clk = devm_clk_get(&pdev->dev, "div-clk");
 	if (IS_ERR(i2c_clk)) {
 		dev_err(nvec->dev, "failed to get controller clock\n");
 		return -ENODEV;
@@ -916,8 +916,11 @@ static int tegra_nvec_remove(struct platform_device *pdev)
 
 	nvec_toggle_global_events(nvec, false);
 	mfd_remove_devices(nvec->dev);
+	nvec_unregister_notifier(nvec, &nvec->nvec_status_notifier);
 	cancel_work_sync(&nvec->rx_work);
 	cancel_work_sync(&nvec->tx_work);
+	/* FIXME: needs check wether nvec is responsible for power off */
+	pm_power_off = NULL;
 
 	return 0;
 }

drivers/staging/nvec/nvec_kbd.c

@@ -169,8 +169,15 @@ static int nvec_kbd_probe(struct platform_device *pdev)
 
 static int nvec_kbd_remove(struct platform_device *pdev)
 {
+	struct nvec_chip *nvec = dev_get_drvdata(pdev->dev.parent);
+	char disable_kbd[] = { NVEC_KBD, DISABLE_KBD },
+	     uncnfg_wake_key_reporting[] = { NVEC_KBD, CNFG_WAKE_KEY_REPORTING,
+						false };
+	nvec_write_async(nvec, uncnfg_wake_key_reporting, 3);
+	nvec_write_async(nvec, disable_kbd, 2);
+	nvec_unregister_notifier(nvec, &keys_dev.notifier);
+
 	input_unregister_device(keys_dev.input);
-	input_free_device(keys_dev.input);
 
 	return 0;
 }

drivers/staging/nvec/nvec_power.c

@@ -414,6 +414,7 @@ static int nvec_power_remove(struct platform_device *pdev)
 	struct nvec_power *power = platform_get_drvdata(pdev);
 
 	cancel_delayed_work_sync(&power->poller);
+	nvec_unregister_notifier(power->nvec, &power->notifier);
 	switch (pdev->id) {
 	case AC:
 		power_supply_unregister(&nvec_psy);

drivers/staging/nvec/nvec_ps2.c

@@ -106,7 +106,7 @@ static int nvec_mouse_probe(struct platform_device *pdev)
 	struct serio *ser_dev;
 	char mouse_reset[] = { NVEC_PS2, SEND_COMMAND, PSMOUSE_RST, 3 };
 
-	ser_dev = devm_kzalloc(&pdev->dev, sizeof(struct serio), GFP_KERNEL);
+	ser_dev = kzalloc(sizeof(struct serio), GFP_KERNEL);
 	if (ser_dev == NULL)
 		return -ENOMEM;
 
@@ -133,6 +133,11 @@ static int nvec_mouse_probe(struct platform_device *pdev)
 
 static int nvec_mouse_remove(struct platform_device *pdev)
 {
+	struct nvec_chip *nvec = dev_get_drvdata(pdev->dev.parent);
+
+	ps2_sendcommand(ps2_dev.ser_dev, DISABLE_MOUSE);
+	ps2_stopstreaming(ps2_dev.ser_dev);
+	nvec_unregister_notifier(nvec, &ps2_dev.notifier);
 	serio_unregister_port(ps2_dev.ser_dev);
 
 	return 0;